AIC1741 AIC [Analog Intergrations Corporation], AIC1741 Datasheet

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AIC1741

Manufacturer Part Number
AIC1741
Description
LOW DROPOUT ADJUSTABLE REGULATOR
Manufacturer
AIC [Analog Intergrations Corporation]
Datasheet
ANALOG INTEGRATIONS CORPORATION
4F, 9 Industry E. 9th Road, Science-based Industrial Park , Hsinchu, Taiwan, R.O.C.
FEATURES
APPLICATIONS
TYPICAL APPLICATION CIRCUIT
ORDERING INFORMATION
AIC1741 XX
1% Accuracy 1.235V Voltage Reference.
Fast Transient Response.
Low Ground Current at 55 A.
Wide Output Current Range, 10 A~80mA.
Output Programmable from 1.235V~11V.
Low Temperature Coefficiency.
Error Flag Warns of Output Dropout.
Voltage Regulator for Pentium
Wireless Communication System.
5V to 3.3V Regulator for VGA Cards.
Battery Powered Systems.
PACKAGE TYPE
N: PLASTIC DIP
S: SMALL OUTLINE
TEMPERATURE RANGE
C: 0 C~+70 C
V
3.3V/3 A
V
5V
OUT
IN
10 F
®
C3
CPUs.
TIP31C
5V to 3.3V Regulator for VGA Cards.
+
Q1
1.2K
R2
R3
2K
R1
390
+
33 F
C2
ORDER NUMBER
AIC1741CN
(PLASTIC DIP)
AIC1741CS
(PLASTIC SO)
Pentium
4
1
2
3
www.analog.com.tw
TEL: (8863)577-2500 FAX:(8863)577-2510
VOUT
NC
GND
NC
AIC1741
LOW DROPOUT ADJUSTABLE REGULATOR
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
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.
®
FLAG
is a registered trademark of Intel Corporation
VIN
NC
FB
VOUT
8
6
5
7
+
TOP VIEW
pin
C1
10 F
PIN CONFIGURATION
VOUT
GND
NC
NC
provides
1
2
3
4
SPEC NO: DS-1741-00
loop
AIC1741
8
7
6
5
frequency
VIN
FB
FLAG
NC
1

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AIC1741 Summary of contents

Page 1

... SO) Pentium www.analog.com.tw LOW DROPOUT ADJUSTABLE REGULATOR 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 ...

Page 2

... OUT GND 1. unless otherwise IN OUT MIN. TYP. =3.3V 3.267 3 0.2 200 55 100 www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 AIC1741 SPEC NO: DS-1741-00 V OUT 3.3V MAX. UNIT 3.333 V 150 PPM 300 300 ...

Page 3

... TEL: (8863)577-2500 FAX:(8863)577-2510 LOW DROPOUT ADJUSTABLE REGULATOR Ground Current vs. Input Voltage Input Voltage (V) Dropout Voltage vs. Load Current V =3.3V OUT Load Current (mA) Bias Current vs. Temperature -50 - Temperature ( C) AIC1741 SPEC NO: DS-1741- 100 75 100 125 3 ...

Page 4

... Reference www.analog.com.tw TEL: (8863)577-2500 FAX:(8863)577-2510 LOW DROPOUT ADJUSTABLE REGULATOR (CONTINUED) 8 VIN 1 VOUT 6 FLAG 3 GND PIN 6: FLAG - Open drain output of error flag warns. PIN Error amplifier positive feedback (see Block Diagram) PIN 8: VIN - Power supply input. AIC1741 SPEC NO: DS-1741-00 4 ...

Page 5

... AIC1741 output PMOSFET, typical output current. Use as an Error Amplifier Fig. 1 shows a popular application for the AIC1741 in switching power supply. The output voltage is sensed between FB pin and GND pin of the AIC1741 through the divider resistor. The VIN pin servos to control the duty cycle of the pulse width modulator to stabilize the output voltage at the set voltage ...

Page 6

... CPU Power Supply for P5 Mother Board 8.0 0.5 2.5 0.1 10°max 8.5 1.0 UNIT: mm www.analog.com.tw LOW DROPOUT ADJUSTABLE REGULATOR 1000 F/6.3Vx2 2.5V~3.5V/10A OUT + C11 C10 C4 0.1 F 0.1 F MICROPROCESSOR 1000 F/6. C13 R2* R10 0 LEAD PLASTIC SO 4.80 0.20 1.27 0.10 0.015X45 1.5 0.2 0.45 0.10 TEL: (8863)577-2500 FAX:(8863)577-2510 AIC1741 SPEC NO: DS-1741-00 P5 CPU 8 max. 6 ...

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