SPX1587_07 Datasheet, PDF (1/11 Pages) Sipex Corporation – 3A Low Dropout Voltage Regulator

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SPX1587
TM
3A Low Dropout Voltage Regulator
FEATURES
■ Guaranteed 3A Output Current
■ Three Terminal Adjustable or Fixed
1.5V, 1.8V, 2.5V, 3.3V and 5.0V
■ Low Quiescent Current
■ Low Dropout Voltage: 1.1V at 3A
■ Line Regulation: 0.1%
■ Load Regulation: 0.1%
■ Stable with 10uF Ceramic Capacitor
■ Overcurrent and Thermal Protection
■ Similar to Industry Standard LT1085/
LT1585
SPX1587
3 Pin TO-263
1 23
ADJ/GND V_OUT V_IN
SPX1587
3 Pin TO-220
1 23
ADJ/GND V_OUT V_IN
■ Available in RoHS Compliant, Lead Free
Packages: TO-252, TO-220, and TO-263
APPLICATIONS
■ Desktop PC's Servers
■ Powering VGA and Sound Cards
■ Cordless Phones
■ Battery Chargers
■ Adjustable Power Supplies
■ Portable Instrumentation
■ SMPS Post-Regulator
DESCRIPTION
The SPX1587 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 SPX1587 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. SPX1587 is available in adjustable or fixed 1.5V, 1.8V, 2.5V, 3.3V and 5.0V output voltages.
The SPX1587 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)
V_IN
Jun8-07 Rev D
Current Limit
+
-
I_CL
V_OUT
_
AMP+ _1.25V
Thermal Limit
+
–
I _TL
SPX1587 Low-Dropout Voltage Regulator

V_REF
ADJ/GND
I_ADJ ^~ 50µA
© 2007 Sipex Corporation