AIC1341 Datasheet, PDF (1/14 Pages) Analog Intergrations Corporation – High Performance, Triple-Output, Auto-Tracking Combo Controller

AIC1341
High Performance, Triple-Output, Auto-
Tracking Combo Controller
n ^FEATURES
l Provide Triple Accurate Regulated Voltages
l Optimized Voltage-Mode PWM Control
l Dual N-Channel MOSFET Synchronous Drivers
l Fast Transient Response
l Adjustable Over Current Protection using R_DS(ON).
No External Current Sense Resistor Required.
l Programmable Softstart Function
l 200KHz Free-Running Oscillator
l Robust Outputs Auto-Tracking Characteristics
l Sink and Source Capabilities with External Circuit
n ^APPLICATIONS
l Advanced PC Mboards
l Information PCs
l Servers and Workstations
l Internet Appliances
l PC Add-On Cards
l DDR Termination
n ^{GENERAL DESCRIPTION}
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-
tion using R_DS(ON). It improves efficiency and saves
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.
Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
DS-1341-00 May 24, 01
TEL: [phone] FAX: [phone]
www.analog.com.tw
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