AAT3237 Datasheet, PDF (1/13 Pages) Advanced Analogic Technologies – 300mA MicroPower™ LDO with PowerOK

AAT3237
300mA MicroPower™ LDO with PowerOK
General Description
The AAT3237 MicroPower low dropout (LDO) lin-
ear regulator is ideally suited for portable applica-
tions where low noise, extended battery life, and
small size are critical. The AAT3237 has been
specifically designed for low output noise perform-
ance, fast transient response, and high power sup-
ply rejection ratio (PSRR).
Other features include low quiescent current, typi-
cally 70µA, and low dropout voltage, typically less
than 400mV at full output current. The device is
output short-circuit protected and has a thermal
shutdown circuit for additional protection under
extreme conditions.
The AAT3237 also features a low-power shutdown
mode for extended battery life. A Power-OK open-
drain output signals when V_OUT is in regulation.
The AAT3237 is available in a Pb-free, space-sav-
ing 6-pin SOT23 or 8-pin SC70JW package in 13
factory-programmed voltages: 1.2V, 1.5V, 1.8V,
2.0V, 2.3V, 2.5V, 2.7V, 2.8V, 2.85V, 2.9V, 3.0V,
3.3V, or 3.5V.
Features
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• Low Dropout: 400mV at 300mA
• Guaranteed 300mA Output
• High Accuracy ±1.5%
• 70µA Quiescent Current
• High Power Supply Ripple Rejection
• Power-OK (POK) Output
• Fast Line and Load Transient Response
• Short-Circuit Protection
• Over-Temperature Protection
• Uses Low Equivalent Series Resistance
(ESR) Ceramic Capacitors
• Shutdown Mode for Longer Battery Life
• Low Temperature Coefficient
• 13 Factory-Programmed Output Voltages
• SOT23 6-Pin or SC70JW 8-Pin Package
Applications
• Cellular Phones
• Desktop Computers
• Digital Cameras
• Notebook Computers
• Personal Portable Electronics
• Portable Communication Devices
Typical Application
VIN
IN
OUT
AAT3237
ON/OFF EN
GND
POK
1µF
GND
VOUT
POK
2.2µF
GND
3237.2006.01.1.4
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