AIC1341

High Performance, Triple-Output, Auto-

Tracking Combo Controller

Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC

www.analog.com.tw

DS-1341-00 May 24, 01

TEL: 886-3-5772500

FAX: 886-3-5772510

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Provide Triple Accurate Regulated Voltages

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Optimized Voltage-Mode PWM Control

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Dual N-Channel MOSFET Synchronous Drivers

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Fast Transient Response

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No External Current Sense Resistor Required.

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Programmable Softstart Function

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200KHz Free-Running Oscillator

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Robust Outputs Auto-Tracking Characteristics

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Sink and Source Capabilities with External Circuit

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Advanced PC Mboards

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Information PCs

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Servers and Workstations

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Internet Appliances

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PC Add-On Cards

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DDR Termination

The AIC1341 combines a synchronous voltage

mode PWM controller with two linear controllers

as well as the monitoring and protection functions

in this chip. The PWM controller regulates the

output voltage with a synchronous rectified step-

down converter. The built-in N-Channel MOSFET

drivers also help to simplify the design of step-

down converter. It is able to power CPUs, GPUs,

memories, chipsets and multi-voltage applications.

The PWM controller features over current protec-

cost, as there is no expensive current sense resis-

tor required.

Two built-in adjustable linear controllers drive an

external MOSFETs to form two linear regulators

that regulates power for multiple system I/O. Out-

put voltage of both linear regulators can also be

adjusted by means of the external resistor divider.

Both linear regulators feature current limit. For a

system I/O requires current less than 500mA, the

AIC1340 is recommended for saving one external

MOSFET.

The programmable soft-start design provodes a

controlled output voltage rise, which limits the cur-

rent rate during power on time.

The shutdown function is also provided for dis-

abling the combo controller.