AIC1741
LOW DROPOUT ADJUSTABLE REGULATOR
SPEC NO: DS-1741-00
FEATURES
1% Accuracy 1.235V Voltage Reference.
Fast Transient Response.
Low Ground Current at 55碌A.
Wide Output Current Range, 10碌A~80mA.
Output Programmable from 1.235V~11V.
Low Temperature Coefficiency.
Error Flag Warns of Output Dropout.
DESCRIPTION
The AIC1741 is a low power precision adjustable
regulator with 80mA output capability. The device
can be used as a secondary regular to provide
feedback in a switching power supply.
The AIC1741 circuitry includes an internal wide
band amplifier, a precision bandgap reference,
and a PMOS output transistor. The feedback
input can be connected to an external resistor
divider to program the sensed output voltage.
The
VOUT
pin
provides
loop
frequency
compensation when used as a part of a larger
servo system.
Although the device works as a stand-alone
regulator, it can also drive an NPN power
transistor to construct a high current low dropout
regulator, with only very minor current loss to
ground.
APPLICATIONS
Voltage Regulator for Pentium
廬
CPUs.
Wireless Communication System.
5V to 3.3V Regulator for VGA Cards.
Battery Powered Systems.
TYPICAL APPLICATION CIRCUIT
V
IN
5V
Q1
TIP31C
V
OUT
3.3V/3 A
C3
10碌F
+
R3
2K
R1
390
+
C2
33碌F
1
VOUT
2
NC
3
GND
4
VIN
8
+
FB
7
FLAG
6
NC
5
C1
10碌F
NC
AIC1741
R2
1.2K
5V to 3.3V Regulator for VGA Cards.
ORDERING INFORMATION
AIC1741 XX
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
TEMPERATURE RANGE
C: 0擄C~+70擄C
ORDER NUMBER
AIC1741CN
(PLASTIC DIP)
PIN CONFIGURATION
TOP VIEW
VOUT
NC
1
2
3
4
8
7
6
5
VIN
FB
FLAG
NC
AIC1741CS
(PLASTIC SO)
廬
GND
NC
Pentium
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
is a registered trademark of Intel Corporation
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
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