ADVANCE INFORMATION AIC1729
400mA LOW DROPOUT LINEAR REGULATO R WITH VOLTAGE DETECT OR FUNCTIO N
SPEC NO: DS-1729-P1 04/27/00
ANALOG INTEGRATIONS CORPORATION www.analog.com.tw
4 F, 9 In d us tr y E . 9t h Ro a d, S ci en c e- ba s ed I nd us t ri a l P ar k , H s in ch u , T a iw an , R .O . C . TEL: (8863)577-2500 FAX:(8863)577-2510 1
! FEATURES
" Including MOSFET for VOUT 1, LDO for VOUT2,
voltage detector, and shutdown control
" Low Dropout Voltage of 650mV(Typ.) at 400mA
Output Current (VOUT2).
" Guaranteed 400mA Output Current for VOUT1
and VOUT2.
" Low Ground Current at 100µA.
" 2% Accuracy Output Voltage of VOUT2.
" Current Limit Function.
" Built in Volta ge Detec tor
" Shutdown Control for VOUT1 and VOUT2
! APPLICATIONS
" Voltage Regulator for DVD-ROM and CD-ROM
Drivers.
! DESCRIPTION
The AIC1729 is a low dropout linear regulator
with voltage detec t ion func tion .
It can be divided into 5 main function blocks,
including MOSFET for VOUT1, LDO for
VOUT2 ,voltage detector, and two shutdown
controls.
Voltage detector can be use to detect Vcc. The
detecting voltage of the voltage detector is from
2.0V to 4.5V with 0.1V step. And the output
(DOUT) of detecting voltage for Vcc with delay
time adjustment function to indicate VCC low. User
only adds one external capacitor to finish it.
When VCC pin is under the set detection voltage.
DOUT pin is logic low.
Vou1 is c on t rol led by SD1 pin. When SD1 is l og ic
high, the internal MOSFET for VOUT1 will be
switched off, vice versa.
The LDO output voltage (VOUT2) is from 2.0V to
4.5V with 0.1V step for different application. It is
also controlled by SD2 pin. When SD2 is logic
high, the i nter n al LDO for VOUT2 will be sh utdown,
vice vers a.
The superior characteristics of the AIC1729
include very low dropout voltage, and 2%
accuracy output voltage. Typical ground current
remains 100µA, from no load to maximum
loading conditions. Dropout voltage of VOUT2 is
650mV at 400mA output current. Output current
limiting is provided at VOUT1 an d VOUT2.
AIC1729 comes in the popular SO8 package.