AAT3242_08 Datasheet, PDF (1/15 Pages) Advanced Analogic Technologies – 300mA/150mA Dual CMOS LDO Linear Regulator

PowerLinear^TM
PRODUCT DATASHEET
AAT3242
300mA/150mA Dual CMOS LDO Linear Regulator
General Description
The AAT3242 is a dual low dropout linear regulator with
Power OK (POK) outputs. Two integrated regulators pro-
vide a high power 300mA output and a lower power
150mA output, making this device ideal for use with
microprocessors and DSP cores in portable products.
Two POK pins provide open drain output signals when
their respective regulator output is within regulation.
The AAT3242 has independent input voltage and enable
pins for increased design flexibility. This device features
a very low quiescent current (140μA typical) and low
dropout voltages (typically 200mV and 400mV at the full
output current level), making it ideal for portable appli-
cations where extended battery life is critical. The
AAT3242 has complete over-current/short-circuit and
over-temperature protection circuits to guard against
extreme operating conditions.
The AAT3242 is available in the space-saving, Pb-free,
12-pin TSOPJW and TDFN33 packages. This device is
capable of operation over the -40°C to +85°C tempera-
ture range.
Features
• High/Low Current Outputs, 300mA/150mA
• Low Dropout:
▪ LDO A: 400mV at 300mA
▪ LDO B: 200mV at 150mA
• High Output Voltage Accuracy: ±1.5%
• High PSRR: 65dB at 1kHz
• 70μA Quiescent Current for Each LDO
• Over-Current/Short-Circuit Protection
• Over-Temperature Protection
• Two POK Outputs
• Independent Power and Enable Inputs
• Uses Low Equivalent Series Resistance (ESR) Ceramic
Capacitors
• 12-Pin TSOPJW and TDFN33 Packages
• -40°C to +85°C Temperature Range
Applications
• Cellular Phones
• Digital Cameras
• Handheld Instruments
• Microprocessor / DSP Core / I/O Power
• Notebook Computers
• PDAs and Handheld Computers
• Portable Communication Devices
Typical Application
VIN
Enable A
Enable B
INA
OUTA
AAT3242
ENA
POKA
OUTB
INB
POKB
ENB
GND
100kΩ
POKA
100kΩ
POKB
2.2μF
OUTPUT A
OUTPUT B
2.2μF
3242.2008.08.1.11
www.analogictech.com
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