AIC1401 Analog Intergrations Corporation, AIC1401 Datasheet

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AIC1401

Manufacturer Part Number
AIC1401
Description
PWM Step-Down Switching Controller with Shutdown
Manufacturer
Analog Intergrations Corporation
Datasheet
Analog Integrations Corporation
DS-1401-00 May 24, 01
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FEATURES
APPLICATIONS
ORDERING INFORMATION
AIC1401-XX
Operation Voltage up to 15V
Voltage-Mode Operation
Fast Transient Response
Built In Accurate 1.3V Voltage Reference
Adjustable Over Current Protection using
R
Required
Low Shutdown Current
200KHz Free-Running Oscillator
Built in Soft Start.
Notebook PC
Advanced PC Mboards
Information PCs
Servers and Workstations
PC Add-On Cards
DS(ON)
No External Current Sense Resistor
PACKAGE TYPE
S: SMALL OUTLINE
TEMPERATURE RANGE
C: 0 C ~+70 C
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
TEL: 886-3-5772500
PWM Step-Down Switching Controller with
FAX: 886-3-5772510
ORDER NUMBER
AIC1401CS
(SOP8)
n
The AIC1401 is a high efficiency, PWM step-
down, voltage-mode, switching controller. It is
suitable for IA, Notebook, LCD PC and LCD
monitor main power applications.
The built-in high voltage CMOS driver drives an
external N-channel MOSFET for replacing the
higher cost P-channel MOSFET in a standard
buck topology.
The 200KHz switching frequency allows using
smaller external components while maintaining
high
bandwidth and 6V/us slew rate of the error
amplifier
bandwidth and the fast transient response.
The
protection. It provides adjustable over current
trigger point and short-circuit protections by
sensing the output current across the on
resistance of the external N-channel MOSFET
rather then an expensive external low value
sense resistor.
DESCRIPTION
AIC1401
conversion
ensures
TOP VIEW
also
OCSET
PIN CONFIGURATION
/SHDN
COMP
efficiency.
FB
the
features
1
2
3
4
higher
Shutdown
www.analog.com.tw
AIC1401
The
over
converter
8
7
6
5
11MHz
current
VCC
UG
LX
GND
1

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AIC1401 Summary of contents

Page 1

... DS-1401-00 May 24, 01 TEL: 886-3-5772500 PWM Step-Down Switching Controller with n DESCRIPTION The AIC1401 is a high efficiency, PWM step- down, voltage-mode, switching controller suitable for IA, Notebook, LCD PC and LCD monitor main power applications. The built-in high voltage CMOS driver drives an ...

Page 2

... F *C1 must be very close to VCC PIN VCC GND 5K AIC1401 R3 2K DC/DC Converter 2 of Copper) … … … … … … … … … … … … … … ......… C/W AIC1401 12V 470 F IR3303 1.5V/ SRA1620 330 FX3 ...

Page 3

... Shutdown Low Input Shutdown High Input Shutdown Mode Current (VCC= 12V, Ta=25 C, unless otherwise TEST CONDITIONS SYMBOL MIN. UGATE Open I VCC V =4.5V OCSET GBW R UGATE R UGATE V =4.5VDC I OCSET OCSET V V AIC1401 TYP. MAX. UNIT 2 9.5 200 88 1.27 1.30 1. 200 0. ...

Page 4

... MOSFET R overcurrent protection. PIN External MOSFET gate drive pin. Connect this pin to gate of the external MOSFET. PIN 8: VCC - The chip power supply pin. Recommended supply voltage is 12V. AIC1401 FB pin to inverting detection pin. for DS(ON) 4 ...

Page 5

... PHYSICAL DIMENSIONS l 8 LEAD PLASTIC SO (unit: mm AIC1401 SYMBOL MIN A 1.35 A1 0.10 B 0.33 C 0.19 D 4.80 E 3.80 e 1.27(TYP) H 5.80 L 0.40 MAX 1.75 0.25 0.51 0.25 5.00 4.00 6.20 1.27 5 ...

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