AAT3216
150mA MicroPower™ LDO with PowerOK
General Description
The AAT3216 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 AAT3216 has been
specifically designed for low output noise perform-
ance, fast transient response, and high power sup-
ply rejection ratio (PSRR), making it ideal for pow-
ering sensitive RF circuits.
Other features include low quiescent current, typi-
cally 70µA, and low dropout voltage, typically less
than 200mV at full output current. The device is
output short-circuit protected and has a thermal
shutdown circuit for additional protection under
extreme conditions.
The AAT3216 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 AAT3216 is available in a Pb-free, space-saving
5-pin SOT23 or 8-pin SC70JW package in 12 facto-
ry-programmed voltages: 1.2V, 1.5V, 1.8V, 2.0V,
2.3V, 2.5V, 2.7V, 2.8V, 2.85V, 3.0V, 3.3V, or 3.5V.
Features
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PowerLinear
™
SmartSwitch
™
Low Dropout: 200mV at 150mA
Guaranteed 150mA Output
High Accuracy: ±1.5%
70µA Quiescent Current
High Power Supply Ripple Rejection
Low Self Noise
Power-OK (POK) Output
Fast Line and Load Transient Response
Short-Circuit and Over-Temperature
Protection
Uses Low Equivalent Series Resistance
(ESR) Ceramic Capacitors
Shutdown Mode for Longer Battery Life
Low Temperature Coefficient
12 Factory-Programmed Output Voltages
SOT23 5-Pin or SC70JW 8-Pin Package
Applications
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Cellular Phones
Desktop Computers
Digital Cameras
Notebook Computers
Personal Portable Electronics
Portable Communication Devices
Typical Application
V
IN
IN
OUT
V
OUT
AAT3216
ON/OFF
EN
GND
1µF
POK
100k
POK
2.2µF
GND
GND
3216.2006.01.1.3
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ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
