SPX2815 1.5A Low Dropout Voltage Regulator APPLICATIONS ■ Desktop PCs, Servers ■ Powering VGA and Sound Cards ■ Cordless Phones ■ Battery Chargers ■ Adjustable Power Supplies ■ Portable Instrumentation ■ SMPS Post-Regulator ■ Constant Current Regulators ■ Disk Drives
FEATURES ■ Guaranteed 1.5A Output Current ■ Three Terminal Adjustable or Fixed 2.5V, 3.3V and 5.0V ■ Low Quiescent Current ■ Low Dropout Voltage of 1.1V @ 1.5A ■ 0.1% Line and 0.1% Load Regulation ■ Stable with 10uF Ceramic Capacitor ■ Overcurrent and Thermal Protection ■ Available Packages: TO-252, TO-220, and TO-263 ■ Similar to Industry Standard LT1086/ LT1586
Refer to Page 5 for Pinouts Now Available in Lead Free Packaging DESCRIPTION The SPX2815 is a low power positive-voltage regulator designed to satisfy moderate power requirements with a cost effective, small footprint solution. This device is an excellent choice for use in battery-powered applications and portable computers. The SPX2815 features very low quiescent current and a low dropout voltage of 1.1V at a full load. As output current decreases, quiescent current flows into the load, increasing efficiency. SPX2815 is available in adjustable or fixed 2.5V, 3.3V and 5.0V output voltages. The SPX2815 is offered in several 3-pin surface mount packages: TO-252, TO-220 and TO-263. An output capacitor of 10μF ceramic or tantalum provides unconditional stability. FUNCTIONAL DIAGRAM (Adjustable) VIN
+
Current Limit
VOUT ICL
Thermal Limit
_ AMP + 1.25V
VREF
+ –
ADJ/GND IADJ ~ 50μA –
I TL
Date: 6/21/06 Rev C
SPX2815 1.5A Low Dropout Voltage Regulator
1
© 2006 Sipex Corporation
ABSOLUTE MAXIMUM RATINGS Operating Junction Temperature Range.....-40°C to +125°C Input Supply Voltage .................................................... +10V Input to Output Voltage ................................................ +8.8V ESD Rating .............................................................. 2kV min
Power Dissipation.......................................Internally Limited Lead Temperature (soldering, 5 seconds) ...............260°C Storage Temperature Range.......................-65°C to +150°C
ELECTRICAL CHARACTERISTICS at VIN=VOUT + 1.5V, TA = 25°C, CIN = COUT = 10μF, IOUT =10mA, unless otherwise specified. The Boldface applies over the full operating temperature range. PARAMETER
MIN
2.5V Version Output Voltage
TYP
MAX
MIN
SPX2815A
TYP
MAX
UNITS
CONDITIONS
SPX2815
2.475 2.500 2.450
2.525 2.450 2.500 2.550 2.425
2.550 2.575
V
IOUT = 10mA, VIN =4.5V 10mA ≤ IOUT ≤ 1.5A, 4.25V ≤ VIN ≤ 10V
3.267 3.300 3.234
3.333 3.234 3.300 3.366 3.201
3.366 3.399
V
IOUT = 10mA, VIN =5V 10mA ≤ IOUT ≤ 1.5A, 4.75V ≤ VIN ≤ 10V
4.950 5.000 4.900
5.050 4.900 5.000 5.100 4.850
5.100 5.150
V
IOUT=10mA, VIN=7V 10mA ≤ IOUT ≤ 1.5A, 6.50V ≤ VIN ≤ 10V
1.238 1.250 1.225
1.262 1.225 1.250 1.275 1.212
1.275 1.287
V
IOUT=10mA, (VIN - VOUT )= 2V 10mA≤IOUT≤ 1.5A, 1.5V≤(VIN-VOUT)≤ 10V
3.30V Version Output Voltage 5.0V Version Output Voltage All Voltage Options Reference Voltage Output Voltage Temperature Stability
0.3
Line Regulation
0.1 0.1 0.1
0.2 0.2 0.2
0.1 0.1 0.1
0.2 0.2 0.2
%
4.25V≤VIN≤ 10V,VOUT=2.5V,IOUT=10mA 4.75V≤VIN≤ 10V,VOUT=3.3V,IOUT=10mA 6.50V≤VIN≤ 10V,VOUT=5.0V,IOUT=10mA
Load Regulation
0.1 0.1 0.1
0.3 0.3 0.3
0.1 0.1 0.1
0.3 0.3 0.3
%
10mA≤IOUT≤ 1.5A, VOUT=2.5V 10mA≤IOUT≤ 1.5A, VOUT=3.3V 10mA≤IOUT≤ 1.5A, VOUT=5.0V
Dropout Voltage (Note 2)
1.00 1.10
1.00 1.10
V
1.2
1.2
IOUT=0.5A IOUT=1.5A
4
10
4
10
mA
Fixed voltage versions
50
120
50
120
μA A
(VIN-VOUT)=5V
0.01
0.1
%/W
25°C, 30mS pulse
75
dB
fRIPPLE=120Hz, (VIN-VOUT)=2V, VRIPPLE=1VPP
Quiescent Current Adjust Pin Current Current Limit
2.5
Thermal Regulation Ripple Rejection
0.5
2.5 0.01
60
%
75
0.1 60
Long Term Stability
0.03
0.03
%
125°C, 1000Hrs
RMS Output Noise
0.003
0.003
%
% of VOUT, 10Hz≤f≤10kHz
Thermal Resistance
3 29.3 3 31.4 6 50
3 29.3 3 31.4 6 50
°C/W
TO-220 Junction to Case, at Tab TO-220 Junction to Ambient TO-263 Junction to Case, at Tab TO-263 Junction to Ambient TO-252 Junction to Case, at Tab TO-252 Junction to Ambient
Date: 6/21/06 Rev C
SPX2815 1.5A Low Dropout Voltage Regulator
2
© 2006 Sipex Corporation
TYPICAL PERFORMANCE CHARACTERISTICS 1.275
3.325
1.27
3.315 Vout (V)
Vout (V)
3.320
3.310 3.305 3.300 4.5
6.5
8.5
10.5
12.5
14.5
1.265 1.26 1.255 1.25 1.245 1.24 1.235 1.23 1.225 -50
1.25v Adj
-30
-10
10
Vin (V)
70
90
110
130
Figure 2. VOUT vs Temperature, VIN=2.5V, IOUT=10mA
3.38 2.5v Adj 2.5v Fixed
3.3v Adj 3.3v Fixed
3.36 3.34 Vout (V)
Vout (V)
50
Temp (C)
Figure 1. Line Regulation for SPX2815U-3.3; IOUT=10mA
2.55 2.54 2.53 2.52 2.51 2.5 2.49 2.48 2.47 2.46 2.45 -50
30
3.32 3.3 3.28
-30
-10
10
30 50 Temp (C)
70
90
110
3.26 -50
130
-30
-10
10
30
50
70
90
110
130
Temp (C)
Figure 3. VIN=4.0V, IOUT=10mA
Figure 4. VIN=5.0V, IOUT=10mA
APPLICATION INFORMATION Output Capacitor
tions. Special care needs to be taken during continuous load conditions such that the maximum junction temperature does not exceed 125°C. Thermal protection is activated at >179°C and deactiviated at
