Datasheet
AS1367
150mA, Adaptive Low Drop-Out Linear Regulator
1 General Description
The AS1367 is a precise, low noise, high speed, low
dropout regulator with adaptive operation. Features
included are high ripple rejection and low dropout volt-
age, a reference voltage source, an error amplifier and a
current limiter.
The AS1367 provides high speed operation, low power
consumption and high efficiency by automatically
switching between a light load and a heavy load mode
depending upon the output current level.
The EN function enables the output to be turned off,
while the electric charge at the output capacitor is
discharged via the internal auto-discharge resistance,
and as a result the V
OUT
pin quickly returns to the GND
level.
Furthermore a Bypass Pin is included to reduce noise.
The device features integrate short-circuit and over
current protection. Under-Voltage lockout prevents
erratic operation when the input voltage is slowly
decaying. Thermal Protection shuts down the device
when die temperature reaches 160°C. This is a useful
protection when the device is under sustained short
circuit conditions.
The device is available in a 8-pin TDFN 2x2 package.
2 Key Features
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Low Dropout Voltage: 110mV @ 150mA load
Operating Input Voltage Range: 2.0V to 5.5V
Output Voltage Range: 1.2V to 5.0V (50mV steps)
Max. Output Current: 150mA
Low Shutdown Current: 100nA
High PSRR: 60dB @ 10kHz
Integrated Overtemperature/Overcurrent Protection
Under-Voltage Lockout Feature
Chip Enable Input
Power-OK
Low Quiescent Current: 10µA
Low Output Noise: 15µV @ 100kHz Bandwidth
Operating Temperature Range: -40°C to +85°C
8-pin TDFN 2x2 Package
3 Applications
The AS1367 is ideal for cellular phones, cordless
phones, wireless communication equipment, portable
games, cameras, video recorders, portable audio-video
equipment and personal digital assistants.
Figure 1. AS1367 - Typical Application Diagram
Input
2V to 5.5V
C
IN
1
µ
F
IN
OUT
Output
1.2V to 5.0V
AS1367
IN
POK
R
PU
100kΩ
C
OUT
3.3µF
C
BYP
10nF
ON /
OFF
EN
BYP
GND
SET
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