AP1086 1.5A LOW DROPOUT POSITIVE ADJUSTABLE OR FIXED-MODE REGULATOR Description

Pin Assignments (Top View)

AP1086 is a low dropout positive adjustable or fixed-mode regulator with 1.5A output current capability. The product is specifically designed to provide well-regulated supply for low voltage IC applications such as high-speed bus termination and low current 3.3V logic supply. AP1086 is also well suited for other applications such as VGA cards. AP1086 is guaranteed to have lower than 1.4V dropout at full load current making it ideal to provide well-regulated outputs of 1.25V to 5.0V with 4.7 to 12V input supply by different output voltage.

VIN

3 2

VOUT

1

Adj (GND)

Tab is VOUT

TO252-3L (Top View) 3

Features

VIN

2

• • • • • • • •

3-Terminal Adjustable or Fixed 1.5V, 1.8V, 2.5V,3.3V, 5.0V 1.4V Maximum Dropout at Full Load Current Fast Transient Response Built-in Thermal Shutdown Output Current Limiting Lead Free Packages: TO252-3L, TO263-3L, TO220-3L TO252-3L, TO263-3L, and TO220-3L: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1)

VOUT

1

Adj (GND)

Tab is VOUT

TO263-3L

(Top View) 3

VIN

2

VOUT

1

Adj (GND)

Tab is VOUT

TO220-3L Notes:

1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html.

Typical Application Circuit Adjustable Regulator

5V to 3.3V Fixed Mode Regulator 5V

5V

C1 100uF

C1 100uF Vin Vout GND Tab is Vout

Vin 3.3V/1.5A

VOUT=Vref × (1+R2/R1)

Vout

C2 100uF

2.5V/1.5A R1 121 Ω R2 121 Ω

Adj Tab is Vout

Note: Vo = V RE ∗ F

AP1086 Document number: DS31028 Rev. 6 - 2

C2 100uF

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( R2 + ) 1 R1 June 2010 © Diodes Incorporated

AP1086 1.5A LOW DROPOUT POSITIVE ADJUSTABLE OR FIXED-MODE REGULATOR Pin Descriptions Pin Name

I/O

Adj (GND) VOUT

O

VIN

I

Pin #

Description

1

Adjustable (Ground only for fixed mode)

2

The output of the regulator. A minimum of 10uF capacitor must be connected from this pin to ground to insure stability.

3

The input pin of regulator. Typically a large storage capacitor is connected from this pin to ground to insure that the input voltage does not sag below the minimum dropout voltage during the load transient response. This pin must always be 1.4V higher than VOUT in order for the device to regulate properly.

Functional Block Diagram

VIN

3

2

VOUT

1

Adj

+ -

+

+

1.25V CURRENT LIMIT + -

Thermal Shutdown

Absolute Maximum Ratings Symbol VIN TST TMJ

Parameter

Rating -0.3 to 12 -65 to +150 150

DC Supply Voltage Storage Temperature Maximum Junction Temperature

Unit V o C o C

Recommended Operating Conditions Symbol Top

Parameter Operating Junction Temperature Range

AP1086 Document number: DS31028 Rev. 6 - 2

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Min

Max

0

125

Unit o

C

June 2010 © Diodes Incorporated

AP1086 1.5A LOW DROPOUT POSITIVE ADJUSTABLE OR FIXED-MODE REGULATOR Electrical Characteristics (Under Operating Conditions) Parameter Reference Voltage

Conditions AP1086-Adj AP1086-1.5

Output Voltage

Line Regulation

ο

TA = 25 C, (VIN-VOUT)= 1.5V,IO = 10mA ο

IOUT = 10mA, TA = 25 C, 3V≦VIN≦12V ο

Min

Typ.

Max

Unit

1.225

1.250

1.275

1.470

1.500

1.530

V

AP1086-1.8

IOUT = 10mA, TA = 25 C, 3.3V≦VIN≦12V

1.764

1.800

1.836

V

AP1086-2.5

IOUT = 10mA, TA = 25οC, 4V≦VIN≦12V

2.450

2.500

2.550

V

AP1086-3.3

IOUT = 10mA, TA = 25οC, 4.8V≦VIN≦12V

3.235

3.300

3.365

V

4.900

5.000

5.100

V

-

-

0.2

%

ο

AP1086-5.0

IOUT = 10mA, TA = 25 C, 6.5V≦VIN≦12V

AP1086-XXX

IO = 10mA, VOUT+1.5V