AS1367 Datasheet, PDF (1/14 Pages) ams AG – 150mA, Adaptive Low Drop-Out Linear Regulator

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 VOUT 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
! 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
1µF
ON /
OFF
IN
OUT
AS1367
IN
POK
EN
BYP
R_PU
100kΩ
Output
1.2V to 5.0V
C_OUT
3.3µF
C_BYP
10nF
GND
SET
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