AAT3242ITP-IP-T1 AAT [Advanced Analog Technology, Inc.], AAT3242ITP-IP-T1 Datasheet

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AAT3242ITP-IP-T1

Manufacturer Part Number
AAT3242ITP-IP-T1
Description
300mA/150mA Dual CMOS LDO Linear Regulator
Manufacturer
AAT [Advanced Analog Technology, Inc.]
Datasheet
General Description
The AAT3242 is a dual low dropout linear regulator
with Power OK (POK) outputs. Two integrated reg-
ulators provide 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 inde-
pendent 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
applications where extended battery life is critical.
The AAT3242 has complete over-current/short-cir-
cuit and over-temperature protection circuits to
guard against extreme operating conditions.
The AAT3242 is available in a space-saving, Pb-
free, 12-pin TSOPJW package.
capable of operation over the -40°C to +85°C tem-
perature range.
Typical Application
3242.2006.04.1.10
VIN
Enable A
Enable B
This device is
300mA/150mA Dual CMOS LDO Linear Regulator
INA
ENA
INB
ENB
AAT3242
OUTA
POKA
OUTB
POKB
GND
Features
Applications
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 Package
-40°C to +85°C Temperature Range
Cellular Phones
Digital Cameras
Handheld Instruments
Microprocessor / DSP Core / I/O Power
Notebook Computers
PDAs and Handheld Computers
Portable Communication Devices
100kΩ
100kΩ
POKB
POKA
2.2μF
PowerLinear
AAT3242
2.2μF
OUTPUT A
OUTPUT B
1

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AAT3242ITP-IP-T1 Summary of contents

Page 1

General Description The AAT3242 is a dual low dropout linear regulator with Power OK (POK) outputs. Two integrated reg- ulators provide a high power 300mA output and a lower power 150mA output, making this device ideal for use with microprocessors ...

Page 2

Pin Descriptions Pin # Symbol Function 1 ENA Enable Regulator A pin; this pin should not be left floating. When pulled low, the PMOS pass transistor turns off and the device enters shutdown mode, consuming less than 1µ ...

Page 3

Absolute Maximum Ratings Symbol Description V Input Voltage IN V Maximum EN to Input Voltage ENIN(MAX Output Current 2 OUT T Operating Junction Temperature Range J T Maximum Soldering Temperature (at leads, 10 sec) LEAD Thermal Information Symbol ...

Page 4

Electrical Characteristics 1.0V for V options greater than 1.5V OUT(NOM) OUT 2.2µ 1.0µ -40°C to +85°C, unless otherwise noted. Typical values are Symbol Description LDO A; I ...

Page 5

Electrical Characteristics 1.0V for V options greater than 1.5V OUT(NOM) OUT 2.2µ 1.0µ -40°C to +85°C, unless otherwise noted. Typical values are Symbol Description LDO B; I ...

Page 6

Typical Characteristics Unless otherwise noted 5V Dropout Voltage vs. Temperature 540 I = 300mA 480 L 420 360 300 I = 100mA 150mA 240 L 180 120 60 0 -40 -30 -20 -10 ...

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Typical Characteristics Unless otherwise noted 5V Turn-On Time and POK Delay V ENABLE V OUT V POK Time (10μs/div) Load Transient Response 2.90 2.85 V OUT 2.80 2.75 2.70 I 2.65 OUT 2.60 Time (100μs/div) POK ...

Page 8

Typical Characteristics Unless otherwise noted 5V Self Noise 10 1 0.1 0.01 0.01 0 Frequency (kHz) 8 300mA/150mA Dual CMOS LDO Linear Regulator = 25°C. A 1.250 1.225 1.200 1.175 1.150 1.125 1.100 1.075 ...

Page 9

Functional Block Diagram INA + Error Amplifier - ENA INB + Error Amplifier - ENB Functional Description The AAT3242 is a high performance dual LDO reg- ulator with two Power OK pins. The first regulator (A) sources 300mA of current, ...

Page 10

Applications Information To assure the maximum possible performance is obtained from the AAT3242, please refer to the fol- lowing application recommendations. Input Capacitor A 1µF or larger capacitor is typically recommended for C in most applications required ...

Page 11

... These larger devices can improve circuit transient response when compared to an equal value capac- itor in a smaller package size. Consult capacitor vendor datasheets carefully when selecting capac- itors for LDO regulators. POK Output The AAT3242 features integrated Power OK com- parators which can be used as an error flag ...

Page 12

Thermal Considerations and High Output Current Applications The AAT3242 is designed to deliver continuous output load currents of 300mA and 150mA under normal operations, and can supply up to 500mA during circuit start-up conditions. This is desirable for circuit applications ...

Page 13

The following is an example for a 2.5V output 2.5V OUTA V = 1.5V OUTB I = 150mA OUTB 125μA GND 909mW - (2 × 4.2V × 125μA) - (4.2 - 1.5) ...

Page 14

... LJXYY 1.8V LHXYY 1.5V NTXYY 1.5V MOXYY 3.0V LVXYY 2.8V LDXYY 2.6V LQXYY 2.5V LLXYY 1.9V LRXYY 1.5V MCXYY 2.7V LOXYY 1.8V MJXYY 1.8V SGXYY 1.5V 2.7V PZXYY 2.8V RRXYY AAT3242 Part Number (Tape and Reel) 2 AAT3242ITP-WN-T1 AAT3242ITP-WI-T1 AAT3242ITP-TR-T1 AAT3242ITP-TN-T1 AAT3242ITP-TI-T1 AAT3242ITP-TG-T1 AAT3242ITP-SG-T1 AAT3242ITP-QT-T1 AAT3242ITP-QQ-T1 AAT3242ITP-QO-T1 AAT3242ITP-QN-T1 AAT3242ITP-QY-T1 AAT3242ITP-QG-T1 AAT3242ITP-PP-T1 AAT3242ITP-OI-T1 AAT3242ITP-IN-T1 AAT3242ITP-IG-T1 AAT3242ITP-IP-T1 AAT3242ITP-IQ-T1 3242.2006.04.1.10 ...

Page 15

Package Information 0.50 BSC 0.50 BSC 0.50 BSC 0.50 BSC 0.50 BSC 3.00 ± 0.10 All dimensions in millimeters. 3242.2006.04.1.10 300mA/150mA Dual CMOS LDO Linear Regulator TSOPJW-12 0.20 + 0.10 - 0.05 7° NOM 4° ± 4° 0.055 ± 0.045 ...

Page 16

Advanced Analogic Technologies, Inc. AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights, or other intellectual property rights are implied. AnalogicTech reserves ...

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