AIC1729
400mA Low Dropout Linear Regulator with
Voltage Detector Function
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FEATURES
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DESCRIPTION
The AIC1729 is a low dropout linear regulator
with voltage detection function.
It can be divided into 4 main function blocks,
including MOSFET for V
OUT1
,
V
OUT2 ,
voltage detector, and
controls.
LDO
for
two shutdown
Including MOSFET for V
OUT
1
, LDO for V
OUT2
,
voltage detector, and shutdown control
Low Dropout Voltage of 550mV(Typ.) at 400mA
Output Current (V
OUT2
).
Guaranteed 700mA Output Current for V
OUT1
and 400mA for V
OUT2
.
Low Ground Current at 120碌A.
2% Accuracy Output Voltage of V
OUT2
.
Current Limit Function.
Built in Voltage Detector
Shutdown Control for V
OUT1
and V
OUT2
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Voltage detector can be use to detect Vcc.
The detecting voltage of the voltage detector
is from 3.0V to 4.6V with 0.1V step. And the
output (DOUT) of detecting voltage for Vcc
with delay time adjustment function to indicate
V
CC
low. User only adds one external
capacitor to finish it. When V
CC
pin is under
the set detection voltage. D
OUT
pin is logic
low.
V
OUT1
is controlled by SD1 pin. When SD1 is
logic high, the internal MOSFET for V
OUT1
will
be switched off, vice versa.
The LDO output voltage (V
OUT2
) is from 1.8V
to 4.0V with 0.1V step for different application.
It is also controlled by SD2 pin. When SD2 is
logic high, the internal LDO for V
OUT2
will be
shutdown, vice versa.
The superior characteristics of the AIC1729
include very low dropout voltage, and 2%
accuracy
output
voltage.
Typical
ground
current remains 120
碌
A, from no load to
maximum loading conditions. Dropout voltage
of V
OUT2
is 550mV at 400mA output current.
Output current limiting is provided at V
OUT1
and V
OUT2
.
AIC1729 comes in the popular SO8 package.
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APPLICATIONS
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Voltage Regulator for DVD-ROM and CD-ROM
Drivers.
Voltage Regulator for HDD and Floppy Drivers.
Voltage Regulator for circuits with Stepping
Motor or Servo Motor.
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Analog Integrations Corporation
4F, 9 Industry E. 9th Rd, Science-Based Industrial Park, Hsinchu, Taiwan
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
DS-1729-04 032102
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