DC/DC Converter Selection Guide Rev. 4.0

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Table of Contents DC/DC Switching Regulators Buck Converters （Integrated FET Switch）

4

24

Boost / Buck‐Boost / SEPIC and Inverting Converters 

14

31

Controllers (External FET Switch)

15

32

Power MOSFETs

18

33

Isolated DC/DC Power Supplies

19

34

Low Dropout (LDO) Regulators 

21

35

For DDR SDRAM S

23

37

Linear Regulators Linear Regulators

38

Notes

DC/DC Converters Selection Guide

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1

ROHM’s Website

Please visit ROHM’s website to view the entire product lineup of power ICs.

http://www.rohm.com

Access Datasheets, Application/Technical Notes, Reference Designs, Evaluation Boards, and other useful information.

DC/DC Converters

MOSFETs

Please refer to the latest datasheet before actual use. DC/DC Converters Selection Guide

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2

ROHM Power Supply Solutions ROHM offers a broad portfolio covering the entire range of power supplies. supplies This selection guide includes DC/DC switching regulators, linear regulators, isolated DC/DC

Secondary Side

Primary Side

converters, and power MOSFETs. Pages 4-12 detail our newest series of buck converters. Users can select the ideal IC based on input voltage, output current and necessary functions. current, functions Page 13 introduces buck switching regulators that support

AC

AC/DC

Transformer

operation up to 6MHz. Ultra-compact chip-scale packages and compatibility with low-inductance coils contribute to

SSwitching Regulator it hi R l t DC/DC Wireless  Power  Supply

PFC

smaller power supply designs, making them suitable for

Linear Regulator Li R l t LDO Power Management Switch High‐side Switch

mobile bil devices. d i Page 14 lists buck-boost DC/DC switching regulators that

Isolated DC/DC

DC

provide stable power supply in portable devices using

Voltage  Detector

Power MOSFET

single-cell lithium-ion batteries. Pages 15-17 discusses our controller ICs that support large output currents via external MOSFET. Page 15 includes models that deliver both fast load response and large current output in FPGA power supplies, while 60V controllers are mentioned on page 17. Page 16 explains H3RegTM, our original fast transient response technology.

Power Supply Block Diagram This allows users to select the optimum IC based on application requirements. However, please verify all specifications, including functions and values, be referring to the latest datasheet before actual usage.

Page 18 introduces MOSFETs ideal for use as external

I d Industrial‐Grade ICs i l G d IC

switching elements for controller ICs.

Long-term supply of products is ensured for the industrial

Page 19 lists isolated DC/DC switching regulators that

market. ROHM guarantees stable product supply for over

eliminate the need for an optocoupler in the feedback circuit,

10 years to meet the requirements of industrial equipment

improving p g reliability. y

manufacturers.

Page 21 spotlights our wide linear regulator (LDOs) lineup,

Part numbers developed for industrial equipment end in

available in 4 different input withstand voltages, 5 output

LB. Typically, when purchasing the Minimum Order

currents, and a variety of output voltages.

Quantity (MOQ) of a standard reel containing 2,000-

Page 23

introduces termination regulators for DDR

3,000 pieces, there will often be pieces left over, which

SDRAM Superior output voltage precision and load SDRAM.

are then either disposed of or stored for a long period of

regulation help to maintain the required level of voltage

time. To prevent this, ROHM is supporting smaller

accuracy stipulated by JEDEC.

production lots by offering 250pc reels. Inventory/stock

Product lists and specifications can be found after page 24.

status can be checked in real-time on our website.

DC/DC Converters Selection Guide

www.rohm.com

Standard Reel 2,000 to 3,000 pcs

Small Reel for the  Industrial Market 250 pcs

3

DC/DC Switching Regulators

Buck Converters （Integrated FET Switch）

New High Efficiency DC/DC Buck Converters Select the appropriate buck DC/DC converter from

BD9x Series BD9x Series

the matrix of input voltage and output current. The

○ ‐ Current Mode Control

◎ ‐ On‐time Control

▼ ‐ Light Load Mode

△ ‐ Nonsynchronous

○ BD9C601EFJ

Maximum Rating

while the following letter represents the maximum

20V

input voltage rating and the next number indicates the

◎ BD9B600MUV ▼

6.0

‘9’ in the part number after ‘BD’ signifies ‘buck’ type,

output current.

○ BD9A600MUV ▼ ○ BD9C501EFJ

20V

○ BD9C401EFJ

20V

Part No. Description

5.0 ◎ BD9B500MUV ▼

B

◎ BD9B400MUV ▼

4.0

Output Currentt (A)

3.0

20V

◎ BD9D320EFJ

20V

○ BD9C301FJ / BD9C301FJ‐LB

20V

SW=570kHz

◎ BD9B300MUV / BD9B301MUV‐LB ▼

○ BD9E302EFJ ▼

30V

○ BD9E303EFJ‐LB

40V

○ BD9E301EFJ BD9E301EFJ‐LB LB

40V

○ BD9E300EFJ‐LB

40V

SW=300kHz

○ BD9A300MUV / BD9A301MUV‐LB ▼ SW=570kHz

2.5

SW=1MHz

◎ BD9B200MUV ▼

2.0

0

0

Serial No. 00, 01, 02, ･･･ Output Current 1 : ≤ 1A  2 : ≤ 2A 3 : ≤ 3A 4 : ≤ 4A ・ ・ A ≤ 10A A：≤ 10A ・ Z : Controller

30V

○ BD9E102FJ ▼

30V

coded, with part numbers of the same color indicating

○ BD9E101FJ‐LB

40V

pin compatibility. For example, the BD9Axxx series

○ BD9E100FJ‐LB

40V

○ BD9G101G △ BD9G101G △

45V

The chart at left, left showing the BD9x lineup, lineup is colorcolor

SW=570kHz

◎ BD9B100MUV ▼ SW=1MHz

○ BD9A100MUV / BD9A101MUV‐LB ▼ 05 0.5 5.0

12

Input Rail Voltage (V) DC/DC Converters Selection Guide

3

○ BD9E151NUX △ SW 570kH SW=570kHz

3.3

Maximum Rated Input  Maximum Rated Input Voltage and Control Mode A : ≤ 7V  Current Mode B : ≤ 7V   On‐time C : ≤ 20V  Current Mode D : ≤ 20V  On‐time E : ≤ 40V  Current Mode E : ≤ 40V Current Mode F : ≤ 40V  On‐time G : ≤ 80V  Current Mode

A

Note: There are some part numbers that do not conform with this rule 

1.2

1.0

9

Topology 9 : Buck 8 : Boost, Buck‐Boost, Inverting

○ BD9A400MUV ▼ ◎ BD9D321EFJ ▼

D

www.rohm.com

24

in green supports input rail voltages of 3.3V and 5.0V in output currents of 1A, 3A, 4A, and 6A. Currentmode d controll is i utilized ili d for f fast f load l d response. And A d the models are pin-compatible with one another, making replacement easy in response to changing current requirements.

4

DC/DC Switching Regulators

Buck Converters （Integrated FET Switch）

BD9x Series : Pin Compatibility Chart 24V 12V 5.0V 3.3V

BD9Dxxx Series

BD9Exxx Series

BD9B100  1A  *1 BD9B200  2A  *1 BD9B300  3A  *1 BD9B400  4A  *1 BD9B500 5A *1 BD9B500  5A  *1 BD9B600  6A  *1

BD9C301  3A BD9C401  4A BD9C501  5A BD9C601  6A

BD9D320  3A BD9D321  3A  *1

BD9E100  1.0A  1MHz BD9E101  1.0A  570kHz BD9E102  1.0A  570kHz  *1 BD9E300  2.5A  1MHz BD9E301 2 5A 570kHz BD9E301  2.5A  570kHz BD9E302  3.0A  570kHz  *1 BD9E303  3.0A   300kHz

Current Mode Control

On Time Control

Current Mode Control

On Time Control

Pin C Compatible

BD9Cxxx Series Pin Compatible

Pin C Compatible

BD9A100  1A  *1 BD9A300  3A  *1 BD9A600  6A  *1

Pin C Compatible

BD9Bxxx Series

*2 Pin Compatible

Pin C Compatible

BD9Axxx Series

Current Mode Control

*1 : Automatically switches from PWM to PFM at lighter loads *2 : Only one terminal is required to switch from the CR component to jumper resistance y q p j p

Similarly, the green BD9Bxxx series,

Current mode control is adopted and of

BD9E151 differs from the red BD9Exxx

The selection chart on the next slide

which employs the on-time control method,

course all models within the series are pin-

series. Compatible with input rail voltages

provides a breakdown of the BD9x series

is pin-compatible across all available

compatible.

of 12V and 24V, the units achieve

based on rectification method, control

output currents (1A, (1A 2A, 2A 3A, 3A 4A, 4A 5A, 5A and

The orange BD9Dxxx series is compatible

asynchronous rectification via current mode

mode and input voltage/output current mode,

6A) and features faster load response than

with input rail voltages of 5.0V or 12V.

control. Provides 1.2A output current in a

ranges. 2 types of rectification are utilized,

the

improved

Only one output current (3A) is offered,

compact 2mm×3mm×0.6mm package.

asynchronous (diode) and synchronous.

efficiency at light loads. In addition, pin

selectable with/without high efficiency

BD9G101

Asynchronous

compatibility with the BD9Axxx series

light load mode.

rectification and current mode control up to

enables bl easy replacement l t when h d i design

Th redd BD9Exxx The BD9E series, i suitable it bl for f rail il

an input i voltage l off 42V. 42V Easily E il configure fi

reducing d i IC die di area. However, H if the th

changes require faster load response.

voltages of 12V or 24V, utilizes current

0.5A output power supplies.

output voltage is low efficiency suffers.

The blue BD9Cxxx series supports input

mode control and is available in output

But when the output voltage is high

rail voltages of 5V or 12V in output

currents

efficiency is the same as with synchronous

currents of 3A, 4A, 5A, and 6A.

300kHz/570kHz/1MHz

BD9Axxx

series

for

of

1A,

2.5A,

3A

and

switching

delivers

asynchronous

rectification

utilizes

rectification.

In contrast, synchronous

frequencies. The 1A and 3A products

rectification minimizes efficiency drops

feature high efficiency at light load. All

across the entire output voltage range and

models are pin-compatible.

ensures continuous, stable operation even when the load current decreases.

DC/DC Converters Selection Guide

an

external diode instead of a low-side switch,

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5

BD9x Series Selection Chart Asynchronous Rectification （Diode Rectification）

Users can select between 2 types of control method: current mode and on-

Rectification Rectification  Method

time control. Current mode provides faster load response characteristics than

Synchronous  Rectification

Control Mode

conventional voltage mode control, and phase compensation settings are easily

Control Mode

Current Mode

Current Mode

implemented. In addition, output ripple voltage is small.

On‐Time 

On-time control

features faster load response than current Light‐Load Mode

Light‐Load Mode Yes

No

Light‐Load Mode

No

Yes

mode

No

BD9E151

BD9Axxx

BD9Cxxx

BD9Bxxx

BD9D320

6.0‐28V, 1.2A

2.7‐5.5V, 1A‐6A

4.5‐18V, 3A‐6A

2.7‐5.5V, 1A‐6A

4.5‐18V, 3A

BD9G101

BD9Ex02

BD9Ex00

BD9D321

6.0‐42V, 0.5A

7.0‐26V, 1A‐3A,  570kHz

7.0‐36V, 1A‐2.5A, 1MHz

4.5‐18V, 3A

doesn‘t

require

phase-

On-time On time control was further improved by increasing load response using ROHM’s proprietary H3RegTM control method. Models equipped with a high-efficiency light load mode are available that conserve power during standby. standby When

BD9Ex01

the load current decreases switching

7.0‐36V, 1A‐2.5A, 570kHz

Asynchronous Rectification Current Mode Control

and

compensation.

frequency and operating current are

BD9E303

reduced, improving efficiency. However,

7.0‐36V, 3A,  300kHz

since the switching frequency will vary

Synchronous Rectification

Synchronous Rectification

Current Mode Control

On‐Time Control

d depending di on the th load l d current, t signal i l interference within the device must be taken into account, along with increasing output ripple voltage.

Thin, Compact Packages The exposed pad enables efficient heat dissipation from the bottom of the ppackage g to the PCB,, makingg it ppossible to offer a 6A DC/DC solution in a

HTSOP‐J8

VQFN016V3030

4.90mm×6.00mm h: 1.00mm

3.00mm×3.00mm h: 1.00mm

compact form factor.

DC/DC Converters Selection Guide

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6

DC/DC Switching Regulators

Buck Converters （Integrated FET Switch） BD9B300MUV automatically switches to light load mode

3.3V/5V Input Rail Solutions Power Supply Solutions for Consumer Equipment

BD9A300MUV automatically switches to light load mode

BD9A100MUV/BD9A300MUV/BD9A600MUV/BD9B300MUV generate low voltages (i.e. 1.8V) from a 3.3V or 5V supply 3.3V or 5V PC/Tablet board

BD9A300MUV or BD9A600MUV

3.3V/3A 3.3V/6A

100

NAND Flash Memory

90

E bl Enable 1.8V/1A BD9A100MUV

70

DDR Memory

Effi ci ency (%)

Example： Storage

80

2.5V/1A / BD9A100MUV

1.2V/3A BD9B300MUV

Controllers ‐ DDR ‐ NAND Flash ‐ I/F ‐ I/O

60

BD9A300MUV PWM fixed mode

50 40

Conditions VIN = 5.0V VO = 1.8V fSW = 1MHz

30 20 10 0 0.001

0.01

0.1

Product Example: BD9B300MUV  Input Voltage Range ： 2.7V to 5.5V BD9B300MUV  Output Voltage Range ： 0.8V to (VIN×0.8)V VIN PGD PVIN PGD PGD  Reference Voltage ： 0.8V±1.0% 0 8V±1 0% AVIN AVIN BOOT BOOT  Output Current ： 3A EN Enable CBOOT  Switching Frequency ： 1MHz / 2MHz 10µF 0.1µF  Built-in Switching FET ： 35mΩ SW SW AGND 1.0µH AGND  Circuit Current ： 35μA PGND PGND p characteristics via fixed  Fast transient response R1 SS on-time control SS  High efficiency Light Load Mode MODE MODE CSS FB FB  Selectable Light-Load Automatic Switching FREQ and PWM Fixed modes R2  Adjustable soft start  Power Good output  Multiple protection functions BD9B300MUV  Application Circuit Over Current Protection (OCP), Short Circuit Protection (SCP), Thermal Shutdown Protection(TSD), Under-Voltage Lock Out (UVLO)

10

BD9B300MUV Efficiency vs. Load Current

15mm×8mm VOUT

CFB 22µF×2

BD9B300MUV PCB DC/DC Converters Selection Guide

1

Loa d Current (A)

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7

2 series offered to meet a variety of system requirements Both the BD9AxxxMU and BD9BxxxMUV series are pin-compatible from 1A to 6A, allowing users to select the ideal solution to meet set demands. Operation automatically switches between high speed PWM mode for larger currents and power high-speed power-saving saving SLLMTM (PFM mode) for smaller load currents currents. The BD9BxxxMUV series is a higher performance line that enables easy replacement with only minor changes to the PCB layout (1 pin), making it possible to quickly respond to sudden design changes.

Part No.

Increasing Performance

High  Performance  Series

Light Load  Operation

Control Method

BD9B100MUV BD9B200MUV BD9B300MUV BD9B301MUV‐LB BD9B400MUV BD9B500MUV BD9B600MUV

Constant On-Time

BD9A100MUV BD9A101MUV‐LB BD9A300MUV BD9A301MUV‐LB BD9A400MUV BD9A600MUV

Current Mode

Function Differences • Constant on-time method results in faster transient response than the BD9AxxxMUV series • Phase compensation not required • Improved efficiency across the entire load range (>BD9AxxxMUV) • MODE terminal = Low → Automatic light load switching, MODE terminal = High → Fixed PWM mode • FREQ terminal = Low → 2MHz operation, operation FREQ = High → 1MHz (2MHz operation enables support for compact 1μH coils)

Deep SLLM

• MODE terminal = Low → Fixed PWM mode, MODE terminal = High → Automatic light load TM SLLM : Simple Light Load Mode SLLM switching (Same function as the BD9Bxxx series, series but logic is reversed)

PVIN

C2 C

C8

GND

SS 9 AGND

FB

ITH

MODE

5

6

7

8

11 10

3

VOUT

GND

PGND SS 9

4 C5

4

L1 SW BD9B300MUV BD9BxxxMUV

GND

PGND

12

2

VIN C1 C

VOUT C7

10

3

13 BOOT

PVIN

11

BD9A300MUV BD9AxxxMUV

C2 C

C1 C GND

SW

14 PGD

1 L1

2

VIN

15 EN

C8

12

1

16 AVIN

C7

13 BOOT

C6

14 PGD

AGND

FB

5

6

FREQ MODE

7

8

R1

C5

15 EN

C6

16 AVIN

PGOOD

ENABLE

PGOOD

ENABLE

SLLMTM : Simple Light Load Mode (automatically switches from PWM to PFM at light loads)

R1

DC/DC Converters Selection Guide

www.rohm.com

J1

J3 J2

R2

J1

R3 C3

R2

C4

8

DC/DC Switching Regulators

Buck Converters （Integrated FET Switch）

12V Input Rail Solution Power Supply Solutions for Consumer Electronics BD9D320EFJ/BD9D321EFJ/BD9C301FJ/BD9C401EFJ/BD9C501EFJ/BD9C601EFJ generate 3.3V or 5V from a 12V power supply

100

VO =5.0V VO = 3.3V VO = 1.8V

90

Isolated AC/DC

12V

Example：AV devices

Product Example: BD9D321FEJ

BD9D320EFJ BD9D321EFJ

5V/3A

BD9D320EFJ BD9D321EFJ

5V/3A

BD9D320EFJ BD9D321EFJ

1.8V/3A

BD9D320EFJ BD9D321EFJ

3.3V/3A

BD9C301FJ BD9C401EFJ BD9C501EFJ BD9C601EFJ

 Input Voltage Range ： 4.5V to 18V  Output Voltage Range ： 0.765V to 7.0V, (VIN×0.07)V to (VIN×0.65)V  Reference Voltage ： 0.765V±1.5%  Output Current ： 3A  Switching Frequency ： 700kHz  Built-in FET Switch ： 100mΩ, 70mΩ  Fast transient response characteristics via constant on-time ti control t l  No phase compensation components required  Compatible with output ceramic capacitors  Synchronous rectification type  High efficiency mode for light loads  Variable soft start function prevents inrush current during power on  Multiple protection functions Over Current Protection (OCP), Short-Circuit Protection (SCP), Thermal Shutdown (TSD), Under-Voltage Lock Out (UVLO) DC/DC Converters Selection Guide

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80

Tuner, AV

70 E EFFICIENCY (%)

85 to 265VAC

USB ports

DDR Memoryy

60 50 40 30

3.3V 3A, 4A, 5A, 6A

Conditions VIN = 12V

20

Controller ‐ DDR ‐ I/F ‐ I/O

10 0 0.001

0.01

0.1 LOAD CURRENT (A)

1

10

BD9D321EFJ: Efficiency vs. Load Current BD9D321EFJ VIN

VIN = 12V VOUT = 1.8V

BOOT EN SW

VOUT 50mV/div

GND VREG

FB

SS

ILOAD 2A/div

IO = 1A→3A→1A 100μs/div BD9D321EFJ Transient Response

BD9D321EFJ  Application Circuit

17mm×20mm BD9D320EFJ PCB

9

DC/DC Switching Regulator

Buck Converter (Integrated FET Switch)

24V Input Rail Solution Power Supply Solution for Home Appliances BD9E102FJ/BD9E302EFJ generates 3.3V or 5V from 15V/24V power supply. Ideal replacement for LDOs to provide greater power savings. 100

BD9E102FJ

90

Example： Refrigerator ・Motor Motor Driver Driver ・IPM (Intelligent Power Module.)

80 Effi ci ency (%)

70

85 to 265VAC

Replaces LDO 5.0V/1A

15V BD9E102FJ

Isolated AC/DC

Sensors and Monitors ‐ Thermistor (Refrigerator) ‐ Thermistor (Freezer) ‐ CO2 Sensor

60 50

LDO (BA50BC0WT)

40 30

Replaces LDO 15V

BD9E302EFJ

5.0V/3A

Conditions VIN = 12V VO = 5.0V

20

Controllers ‐ Digital Signal ‐ Network ‐ Touchscreen ‐ Compressor

10 0 1

10 100 Loa d Current (mA)

1000

Product Example: BD9E102FJ BD9E102FJ: Efficiency vs. Load Current

 Input Voltage Range  Output Voltage Range

： 7.0V to 26V ： (VIN×0.143)V to (VIN×0.7)V (VIN×0.143) ≥ 1.0V VIN  Reference Voltage ： 0.8V±2.0% 12V 10μF  Output Current ： 1.0A  Switching Frequency ： 570kHz  Supports 28V input for home appliances Enable  High i h efficiency ffi i at light li h loads l d saves power during d i standby db  Built-in FET switch ： 250mΩ, 200mΩ  Fast transient response characteristics via current mode control  Easily set phase compensation  No external diode required (for synchronous rectification)  Soft start prevents inrush current during power on  Multiple protection functions Over Current Protection (OCP), Short Circuit Protection (SCP), Thermal Shutdown (TSD), Under Voltage Lock Out (UVLO) DC/DC Converters Selection Guide

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VIN VIN

BD9E102FJ BD9E102FJ

BOOT BOOT 0.1μF SW SW

6.8μH

VO 5.0V 22μF

EN EN

AGND PGND PGND FB COMP AGND FB COMP 430kΩ

82kΩ

BD9E102FJ Application Circuits

BD9E102FJ  Evaluation Board

10

DC/DC Switching Regulators

Buck Converters （Integrated FET Switch）

24V Input Rail Solution Power Supply Solutions for Industrial Products 100

BD9E100FJ/BD9E101FJ/BD9E300EFJ/BD9E301EFJ/BD9E303EFJ generate 3.3V or 5V from a 12V/24V power supply

Isolated AC/DC

24V BD9E100FJ‐LB

5V/1A

3.3V/1A BD9E101FJ‐LB

BD9E300EFJ‐LB

5V/2.5A

1.8V/3A BD9E303EFJ‐LB

Base Unit ‐ ASIC

VO = 12V

80

VO = 5.0V

70

Effi ci ency (%)

85 to 265VAC

90

I/O Unit ‐ ASIC

60 50 40

Conditions VIN = 24V

30

Analog Unit ‐ ASIC

20 10

CPU Unit ‐ CPU

0 0

05 0.5

1

15 1.5

2

25 2.5

Loa d Current (A)

Product Example: BD9E300EFJ‐LB

BD9E300EFJ‐LB: Efficiency vs. Load Current

 Long-term stable supply suitable for industrial applications  Supports pp 40V input p for industrial equipment q p  Input Voltage Range ： 7.0V to 36V  Output Voltage Range ： (VIN×0.15)V to (VIN×0.7)V (VIN×0.15) ≥ 1.0V  Reference Voltage ： 1.0V±2.0%  Output Current ： 2.5A  High 1MHz switching frequency enables compatibility with smaller inductors  Built-in FET switch ： 170mΩ, 140mΩ  Fast transient response characteristics via current mode control  No external diode required (for synchronous rectification)  Soft start prevents inrush current during power on  Multiple protection functions Over Current Protection (OCP), Short Circuit Protection (SCP), Thermal Shutdown (TSD), Under Voltage Lock Out (UVLO) DC/DC Converters Selection Guide

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VIN

BD9E300EFJ‐LB

BOOT

SW

27mm×10mm EN COMP

AGND PGND

FB

BD9E300EFJ PCB BD9E300EFJ PCB

4700pF 30kΩ

BD9E300EFJ‐LB  Application Circuit Exposed pad ensures efficient heat dissipation

11

Product Example: BD9E151NUX  DC-DC converter with built-in 30V MOSFET VIN  Input voltage range ： 6.0V 6 0V to 28V 24V  Output voltage range ： (VIN×0.06)V to (VIN×0.7)V 10μF (VIN×0.06) ≥ 1.0V  Reference voltage ： 1.0V±1.0%  Output current ： 1.2A Enable  Switching frequency: 600kHz  Automatically switches to Pulse Skip Mode during light loads (via diode rectification) to maintain high efficiency  Integrated high side switching FET: 80mΩ  Current mode control enables fast transient response  Easily set phase compensation  Variable soft start function prevents inrush current during power ON  Multiple protection circuits Overcurrent protection (OCP), overvoltage protection (OVP), Thermal shutdown (TSD), Under voltage lock out (UVLO)

VCC VCC

BD9E151NUX BD9E151NUX

BST BST 0.1μF

LX LX

VOUT 5.0V

15μH

47μF

EN EN SS SS

VC VC

GND GND

FB FB

VSON008X2030

12kΩ 1000pF

2.0mm×3.0mm h: 0.6mm

0.047μF 3kΩ

2.7kΩ

BD9E151NUX Application Circuit

Product Example: BD9G101G BD9G101G VCC VCC

100

BST BST

LX LX

6.8μH

GND

FB FB 3.9kΩ

680Ω

www.rohm.com

80 70

VIN=24V VO=5.0V

60 50 40 30

0.1μF

BD9G101G Application Circuit

20 10 0 1

SSOP6 2.9mm x 2.8mm h: 1.25mm

DC/DC Converters Selection Guide

VOUT 5.0V 10μF

EN EN

VIN=12V VO=5.0V

90

0.015μF

E EFFICIENCY (%)

VIN  DC-DC Converter with built-in 45V MOSFET 24V  Input voltage range ： 6.0V to 42V 4.7μF  Output voltage range ： (VIN×0.15)V to (VIN×0.7)V (VIN×0.15) ×0 15) ≥ 1.0V 1 0V  Reference voltage ： 0.75V±1.5% Enable  Output current ： 500mA  High 1.5MHz switching frequency makes it possible to use smaller inductors y switches to Pulse Skipp Mode duringg light g loads  Automatically (via diode rectification) to maintain high efficiency  Integrated high side switching FET: 800mΩ  Current mode control enables fast transient response  Built-in phase compensation circuit  Soft start function prevents inrush current during power ON  Multiple M lti l protection t ti circuits i it Overcurrent protection (OCP), Thermal shutdown (TSD), Under voltage lock out (UVLO)

10 100 LOAD CURRENT (mA)

1000

BD9G101G: Efficiency vs Load Current

12

DC/DC Switching Regulators

Buck Converters （Integrated FET Switch）

6MHz High Frequency Switching Regulators BU9000xGWZ Series

100 90 Efficciency (%)

 Input Voltage Range ： 2.3V to 5.5V  Output Voltage ： 1.2V, 1.25V, 1.8V, 2.5V, 3.0V, 3.3V  Output Voltage Accuracy： ±2.0%  Output Current ： 1.0A  6MHz (max.) switching operation  Ultra-compact chip scale package: 1.3mm x 0.9mm  Fast transient response characteristics via hysteresis control  No phase compensation components required  PWM/PFM automatic switching function ensures high efficiency across all load regions  Switching frequency can be fixed via forced PWM mode  Soft start prevents inrush current during power on  Multiple protection circuits Over Current Protection (OCP), Thermal Shutdown (TSD), Under Voltage Lock Out (UVLO)

80 70 3.6V→3.0V 3.6V→1.8V 5.0V→3.3V 3.6V→1.2V

60 50

L : LQM21MPN1R0NG0 (Murata)

40 1

10

100

1000

Load Current (mA)

BU9000xGWZ: Efficiency vs Load Current

VO 50mV/div

7mm×4mm

Ultra‐Compact Wafer‐Level Chip‐Scale Package IOUT 200mA/div

UCSP35L1 1.3mm×0.9mm×0.4mm

BU90002GWZ PCB

10μs/div

BU90003GWZ Transient Response (50mA → 350mA)

Output Voltage

Part No.

Input Voltage  Range

Switching Frequency

PWM/PFM Automatic  Switching

1.2V

BU90003GWZ

2.3V to 5.5V

4MHz

✔

－

✔

1.25V

BU90007GWZ

2.3V to 5.5V

4MHz

✔

－

✔

1.8V

BU90004GWZ

2.3V to 5.5V

5.4MHz

✔

－

✔

2 5V 2.5V

BU90005GWZ

2 3V to 5.5V 2.3V to 5 5V

6MHz

－

✔ (100mA max)

✔

3.0V

BU90006GWZ

2.3V to 5.5V

6MHz

✔

－

✔

3.3V

BU90002GWZ

4.0V to 5.5V

6MHz

✔

－

✔

DC/DC Converters Selection Guide

www.rohm.com

Forced PFM

Forced PWM

VIN

LX FB

EN MODE GND

BU9000xGWZ Application Circuit

13

DC/DC Switching Regulator 

Boost / Buck‐Boost / SEPIC and Inverting Converter 

Portable Power Supply Solution BD8306MUV generates 3.3V or 5.0V from 1 lithium-ion cell or 2-3 alkaline/NiCd/NiMH cells

Rechargeable or Dry‐Cell Battery

1.8V to 5.5V

BD8306MUV

3.3V/1A

NAND Flash Memory

or 5 0V/0 7A 5.0V/0.7A BD9A100MUV

1.8V DDR Memory

Product Example：BD8306MUV

PVCC

PGND

1.2V

Controllers ‐ DDR ‐ NAND Flash ‐ I/F ‐ I/O

Lx1

BD9B300MUV

2.5V

Lx1

BD9A100MUV

PVCC

 Input Voltage Range ： 1.8V to 5.5V  Output Voltage Range ： 1.8 to 5.2V  Reference Voltage ： 0.5V±1.0%  Integrated 2A FET switch  Configure a high efficiency buck-boost DC/DC converter with a single inductor  Soft S ft start t t prevents t inrush i h currentt during d i power on  Operating frequency: 500kHz to 1.5MHz  Multiple protection functions Short Circuit Protection (SCP), Thermal Shutdown (TSD), Under Voltage Lock Out (UVLO)

PGND

VCC

Lx2 BD8306MUV

STB

Lx2

BD8306MUV: Efficiency vs. Output Current DC/DC Converters Selection Guide

www.rohm.com

GND

INV

FB

Conditions fSW = 1MHz VO = 3.3V

VOUT

VOUT

RT

BD8306MUV  Application Circuit

14

DC/DC Switching Regulators 

Controllers (External FET Switch)

Power Supply Solutions for FPGA BD95601MUV-LB and BD95602MUV-LB utilize original H3RegTM technology to provide the fast transient response characteristics required for FPGAs. These power supply ICs are designed to generate power supply voltages that meet the tight voltage accuracy specifications demanded by FPGAs from 12V input. In addition, compatibility with startup power supply sequences is provided.

FPGA Selection Tree 12V

BD95601MUV‐LB

1.0V±3.00%, 6A

BD95601MUV‐LB

1.8V±5.00%, 6A

BD95601MUV‐LB

2.0V±3.00%, 2A 2.5V±5.00%, 8A

BD95602MUV‐LB 3.3V±5.00%, 8A BD95601MUV LB BD95601MUV‐LB

1 0V±3 00% 6A 1.0V±3.00%, 6A

BD95601MUV‐LB

1.5V/1.35V±5.00%, 4A

BD95601MUV‐LB

1.2V±2.50%, 4A

BD95602MUV‐LB Application Circuit

VIN: 12V, VO: 3.3V

BD95602MUV‐LB  H3RegTM 2ch DC/DC controller delivers fast transient response  3 selectable modes: Light load, Continuous PWM, and Quiet light load  Adjustable soft start function prevents inrush current during power on  Power Good output  Input Voltage Range ： 5.5V to 28V  Multiple protection functions  Output Voltage Range ： 1.0V to 5.5V - Over Current Protection (OCP)  Standard St d d Voltage V lt ： 0.7V±1.0% 0 7V±1 0% - Over O V Voltage lt P Protection(OVP) t ti (OVP)  Switching Frequency ：150kHz to 500kHz - Thermal Shutdown (TSD) - Under Voltage Lock Out (UVLO)

VOUT: 100mV/div

IO: 5A/div IL: 5A/div 5A/di 20μsec/div BD95602MUV‐LB  Fast Transient Response Characteristics

DC/DC Converters Selection Guide

www.rohm.com

Avnet, Inc. Power Module Board For Mini Module Plus Development System (Kintex‐7)

15

Fast Transient Response Technology H3Reg R TM Control Enables Quick Response to Load changes  C t l E bl Q i k R t L d h Current mode control is a popular control method for switching regulators, but there are cases where the specifications for transient response characteristics with respect to load current changes are insufficient. In these instances switching regulators utilizing hysteresis control are often used. Constant-on-time control, which is a type of hysteresis control, maintains constant output voltage by feeding back ripple voltage that occurs within the output voltage and performing switching control while comparing the reference voltage with the bottom of the ripple voltage. When the feedback voltage drops below the reference voltage a one-shot pulse is generated and the high-side switch turns on, supplying current to the output (from the input). In this method sequential switching control is performed by simple comparison, virtually eliminating delay time for feedback control, enabling faster transient response than current mode control. H3RegTM control is a more advanced type of constant on time control developed by ROHM. When the load current suddenly increases the output voltage drops and if the feedback voltage does not rise higher than the reference voltage (even after the predetermined on-time) the on-time of the high-side switch is extended and more power is supplied, accelerating the return of the output voltage. As a result, faster transient response can be obtained vs. constant on-time control. Plus, the number of switching operations during sudden load changes is decreased, minimizing noise generation.

H3Reg Controller

SW R

IL

Q Driver

IL

IO VOUT

Io

S

SW

Vref

Constant On Time Control: Operating Waveforms

H3RegTM Block Diagram

IL Io SW

t + α H3RegTM Control: Operating Waveforms DC/DC Converters Selection Guide

www.rohm.com

16

DC/DC Switching Regulator 

Controller (External FET Switch)

48V Input Buck Controller Product Example：BD9611MUV p The BD9611MUV buck synchronous rectification DC/DC controller features a withstand voltage of 60V and a wide input voltage range. PWM and voltage-mode control circuits are built in, along with 2 external 10V Nch FET drive circuits. In addition, functions for adjusting the oscillation frequency and soft start time, providing overcurrent protection, and enabling synchronization with external clocks are included, providing greater design flexibility. Furthermore, an under-voltage lock out circuit (EXUVLO) with a high accuracy reference voltage for the CTL pin is connected, adjustable between VCC and GND (via resistance ratio). The controller also offers pre-bias compatibility and minimizes inrush current from the output side during startup.  Input Voltage Range ： 10V to 56V  Output Voltage Range ： 1.0V to (VIN×0.8)V  Reference Voltage ： 0.8V±1.0%  External Nch FET drive circuits built in  Gate drive voltage ： 9.0V to 11V  Pre-bias compatibility  Variable soft-start prevents inrush current during power on  Adjustable operating frequency ： 50kHz to 500kHz  Set the UVLO value using external components  External E l clock l k synchronization h i i  Synchronous operation of multiple output channels possible using several ICs  Multiple protection functions Over Current Protection (OCP), Thermal Shutdown (TSD), Under Voltage Lock Out (UVLO)

FB

CTL

VCC CLH CLL RCL

INV SS

BST

BD9611MUV

HG

REG5 LX

RTSS RT

REG10 LG

SYNC CLKOUT GND PGND

100%

Efficiiency

95%

BD9611MUV Application Circuit VIN=24V VIN=36V

90% 85%

VIN=48V

80% Conditions VO = 12V fSW = 250kHz

75% 70% 0 0 

2 2 

4 4 

6 6 

8 8 

10 10 

12 12 

Load Current[A]

BD9611MUV  Efficiency  vs. Load Current

DC/DC Converters Selection Guide

www.rohm.com

VIN = 34V, V = 34V VO = 12V, I = 12V IO= 0A → 10A = 0A → 10A BD9611MUV Transient Response  Characteristics

Exposed pad ensures efficient heat dissipation

17

Power MOSFETs Medium Power / Dual Package MOSFET The HS8K/HP8K series are switchingg components p for DC/DC converters that integrate g high-side g and low-side MOSFETs in a single g ppackage, g , reducing g mountingg area significantly. g y Wiring inductance between the internal high-side and low-side MOSETs is minimized for improved conversion efficiency, and high efficiency operation at high frequencies is achieved by decreasing on-resistance and capacitance using the latest processes. FOM=Ron×Qgd

D1 G1 S1/D2 /

DC/DC DC/DC Controller Controller

VOUT

G2 S2

7

Current  Process FOM=16

4 New  Process FOM=8

2

1

1

New MOSFET

2 4 7 On‐Resistance Ron (mΩ)

10

Improved Performance Index FOM (Figure of Merit)

Efficien ncy (%)

HS8K/HP8K Series

Gate‐Drain Gaate Charge Qgd (nC)

10

VIN

Current  Cu e t product Conditions VIN = 19V VO = 1.05V fSW = 1MHz

Application Circuit Diagram

Product Example：HS8K/HP8K series  30V withstand voltage  Incorporates high-side and low-side MOSFETs into a single package to reduce mounting area  Achieves high efficiency operation even at high frequencies efficiency by combining the latest device process and packaging technologies  Performance index (FOM) improved by 2 times  Nch + Nch configuration  Drain current: 32A+12A

Load Current (A)

Single Type Dual Type High‐side MOSFET

Greater efficiency during high‐frequency  switching operation

Low‐side MOSFET

Integrated design reduces mounting area by 50%

DC/DC Converters Selection Guide

www.rohm.com

18

Isolated DC/DC Power Supply Flyback Converter Product Example：BD7F100HFN‐LB p The newly developed BD7F100HFN-LB isolated flyback DC/DC converter IC stabilizes the secondary output via primary flyback voltage control, eliminating the need for a feedback path from the output. As a result, the optocoupler typically used for isolating the feedback path in conventional isolated converters is no longer required. This reduces both costs and component count considerably, improving reliability. And in terms of performance, fast load response is achieved by utilizing adaptive on-time control, while an automatic light load mode ensures high efficiency across all load regions. Cross-regulation is also greatly improved. Ideal for isolated power supplies in a variety of equipment, including isolated gate driver power supplies for inverters. inverters  Input Voltage Range ： 3.0V to 40V (45V Rated)  Switch Terminal Voltage ： 50V (60V Rated)  Switch Current Limit ： 1.25A  Operating Frequency ： 400kHz  Reference Voltage ： ±1.5% ±1 5%  Fast load response via adaptive type on-time control  Fixed frequency operation simplifies EMC countermeasures  Automatic light load mode ensures high efficiency across all load regions  Eliminates the need for parts that cross the isolation boundary, improving functional safety  Limited-life components not required, enabling long-term operation  Supports multi-output configurations for superior cross-regulation  Load compensation function for secondary SBD  Output voltage adjustable based on 2 external resistors and transformer winding ratio  Soft start function  Multiple protection circuits Over Current Protection (OCP), Thermal Shutdown (TSD), Under Voltage Lock Out (UVLO)

Ex：Inverter

VIN

VOUT_UH

BD7F100HFN‐LB GND_UH VIN

VIN

VOUT_UH

Isolator MCU

VOUT_UH Gate Driver

GND_UH VIN

UH

GND_UH

VOUT_WH

BD7F100HFN‐LB GND_WH VIN

VOUT_WH WH

Isolator

Gate Driver GND_WH

VIN

VOUT_WH WH WH

GND_WH

VOUT_L

VIN SDX/EN

BD7F100HFN‐LB

BD7F100HFN‐LB

GND_L

FB

COMP

VIN

SW AGND

REF

PGND

VOUT_L

Isolator Isolator

BD7F100HFN-LB Application Circuit (24V→5V) DC/DC Converters Selection Guide

www.rohm.com

GND_L

VOUT_L Gate Driver

UL

Gate Driver

WL

GND_L

19

VIN SDX/EN

Vcc1

Ex：RS485 Transceiver

Vcc2

BD7F100HFN‐LB FB

COMP

BD7F100HFN‐LB

SW AGND

REF

PGND

Vcc1 BD7F100HFN-LB Application Circuit (24V→±15V)

MCU

Vcc2

Vcc1

DE DI

Isolator RS485 transceiver

RO

VIN SDX/EN BD7F100HFN‐LB

5.25

FB SW REF

PGND

BD7F100HFN LB Application Circuit (5V→5V) BD7F100HFN-LB

Max. Output Power (W)

AGND

5.2

8

5.15

7

Output Vo oltage (V)

COMP

6 5 4 3

Without Load  Compensatio

4.95 4.9 Conditions VIN = 24V VOUT  = 5 0V OUT = 5.0V

4.75

0 0

5

10 15 20 25 30 35 40 45 50 VIN Voltage (V)

BD9F100HFN-LB: Max. Output Power vs VIN Voltage

www.rohm.com

5

4.8

1

DC/DC Converters Selection Guide

5.05

4.85

2

BD7F100HFN-LB Evaluation Board

With Load  Compensation

5.1

0

200 400 600 800 Load Current (mA)

1000

Load Compensation Function Efficiency The Load Compensation Function corrects the output voltage drop based on the Vf characteristics of the secondary SBD that varies depending on the load current

20

Linear Regulators   Low Dropout (LDO) Regulators Low Noise Power Supply Solutions Connecting LDO regulators after switching regulators reduces noise while improving efficiency, efficiency making them ideal for circuits requiring low-noise low noise power supplies such as communication systems. 12V/24VDC

Switching Regulator

5V

Switching Regulator

3.3V

Switching Regulator

USB Ports

Controllers ‐ DDR ‐ I/F ‐ I/O

2.5V

1.2V BD12IC0WEFJ

1A

Transceiver

1.8V BD18IA5WEFJ

0.5A

PLL

Product Examples: BDxxIxx , BDxxHxx, BDxxGxx, BDxxFxx series  Input Voltages ： 7V, 10V, 15V, 30V  Output Currents ： 0.1A, 0.3A, 0.5A, 1.0A, 1.5A  Fixed and variable output voltage types available (adjustable via external resistor)  Output Voltage Range ： 0.8V to 15V  Output Voltage Accuracy ： ±1%  Compatible C ibl with i h output ceramic i capacitors i  Enable function  Soft-start prevents inrush current during power ON  Thermal Shutdown (TSD)  Over Current Protection (OCP)

Vo

Vcc BD00IA5WEFJ EN

GND

FB

Vo Vcc BD18IA5WEFJ Vo_s EN

GND

BD18IA5WEFJ Application Circuit

BD00IA5WEFJ Application Circuit BD00IA5WEFJ Application Circuit

DC/DC Converters Selection Guide

www.rohm.com

21

Part Number Explanation B Output Voltage 00 : Adjustable 10 : 1.0V 12 : 1 2V 12 : 1.2V 1C : 1.25V 15 : 1.5V 18 : 1.8V 25 : 2.5V 26 : 2.6V 30 : 3.0V 30 30 33 : 3.3V

D

1

BDxxFA1FP3 Series only

Note：Some part numbers do not conform to these guidelines

8

H

A

5

W

EFJ Package EFJ : HTSOP‐J8  HFV : HVSOF6 NUX : SON008X2030 FP3 : SOT89‐3

50 : 5.0V 54 : 5.4V 60 : 6 0V 60 : 6.0V 70 : 7.0V 80 : 8.0V 90 : 9.0V J0 : 10V J2 : 12V J5 : 15V J5 5

HTSOP‐J8 4.9mm×6.0mm H: 1.0mm H: 1.0mm

Shutdown Switch

BDxxIxxWHFV Series only

BDxxGA3WNUX Series only

HVSOF6 1.6mm×3.0mm H: 0 75mm H: 0.75mm

VSON008X2030 2.0mm×3.0mm H: 0 6mm H: 0.6mm

Brank : none  Brank :  none W      :  having

Maximum Input Voltage I  : 7V H : 10V  G : 15V F : 30V

Output Current A3 : 300mA  A5 : 500mA C0 : 1A C5 : 1.5A

Compact packages with exposed pad for efficient heat dissipation  characteristics

Product Example：BUxxUA3WNVX Series Product Example：BUxxUA3WNVX Series

900

VOUT

VIN

BU18UA3WNVX STBY

GND

BU18UA3WNVX  Application Circuit

800

Conditions: IOUT = 200mA

700 600

Existing  P d t Product

500 400 300 200

SSON004X1010 1.0mm x 1.0mm H: 0.6mm Compact Package

www.rohm.com

I/O Dropout Voltage (mV)

 Compact 1.0mm x 1.0mm x 0.6mm package (SSON004X1010)  Input Voltage Range ： 1.7V to 5.5V  Input Rated Voltage ： 6V  Output Current ： 300mA  Output Voltage ： 1.0V to 3.7V  Output Voltage Accuracy ： ±1% (±25mV for VOUT