AIC1401CS AIC [Analog Intergrations Corporation], AIC1401CS Datasheet

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AIC1401CS

Manufacturer Part Number
AIC1401CS
Description
PWM Step-Down Switching Controller with Shutdown
Manufacturer
AIC [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)
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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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AIC1401CS Summary of contents

Page 1

... 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. ORDER NUMBER AIC1401CS (SOP8) FAX: 886-3-5772510 AIC1401 Shutdown conversion efficiency. The ...

Page 2

TYPICAL APPLICATION CIRCUIT C2 1000P R1 OCSET /SHDN COMP C5 33P 90.9K 1000P R4 13K n ABSOLUTE MAXIMUM RATINGS Supply Voltage, V ....… ...… … … ............................… … … … ......................................... 15V CC Input, Output, or ...

Page 3

ELECTRICAL CHARACTERISTICS specified.) PARAMETER VCC Supply Current Nominal Supply Power-On Reset V Threshold CC Oscillator Frequency Duty Cycle Internal Reference Voltage Reference Voltage Error Amplifier DC Gain Gain-Bandwidth Product Slew Rate Gate Driver Upper Gate Source Upper Gate Sink ...

Page 4

PIN DESCRIPTIONS PIN 1: OCSET- Current limit sense pin. Connect a resistor R the drain MOSFET. R 200 A current source (I and the external MOSFET on- resistance (R the overcurrent according equation: I OCSET I PEAK If FB ...

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 ...

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