APW3007
Advanced Dual PWM and Dual Linear Power Controller
Features
•
Provides 4 Regulated Voltages
General Description
The APW3007 provides the power control and pro-
tection for four output voltage in high-performance mi-
croprocessor and computer applications.
The APW3007 is designed to provide termination
voltage VTT(1.25V) with ±1% accuracy.
It integrates two PWM controllers , a linear regulator
and a liear controller as well as the monitoring and
protection function into a single package. One PWM
controller regulates the microprocessor core voltage
with a synchronous-rectified buck converter , while the
second PWM controller supplies the I/O 3.3V power
with a standard buck converter. The linear controller
regulates power for GTL bus and the intermal 200mA
regulator for clock driver circuits.
The APW3007 can provide in excess of 14A of out-
put current for an on-board DC/DC converter via in-
ternal reference voltage. It can monitor all the output
voltage , and a single Power Good signal is issued
when the core is within 10% of the internal reference
voltage and the other levels are above their under-
voltage levels. Additional built-in over-voltage protec-
tion for the core output uses the lower MOSFET to
prevent output voltage above 115% of the reference
voltage. The PWM controller’s over-current function
monitor the output current by sensing the voltage drop
across the upper MOSFET’s R
DS(ON)
, eliminating the
need for a current sensing resistor.
−
Microprocessor Core , I/O , Clock Chip and
GTL Bus
•
•
Simple Single-Loop Control Design
−
Voltage-Mode PWM Control
Fast Transient Response
−
High-Bandwidth Error Amplifier
−
Full 0% to 100% Duty Ratio
•
Excellent Output Voltage Regulation
−
Core PWM Output :
±1%
Over Temperature
−
I/O PWM Output :
±2%
Over Temperature
−
Other Output :
±2.5%
Over Temperature
•
•
Power-Good Output Voltage Monitor
Microprocessor Core Voltage Protection Against
Shorted MOSFET
•
Over-Voltage and Over-Current Fault Monitors
•
Small Converter Size
−
Constant Frequency Operation
−
200kHz Free-Running Oscillator ;
Programmagle from 50kHz to 800kHz
Applications
•
•
•
•
Motherboard Power Regulation for Computers
Low-Voltage Distributed Power Supplies
VGA Card Power Regulation
Termination Voltage
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain
the latest version of relevant information to verify before placing orders.
Copyright
ANPEC Electronics Corp.
Rev. A.5 - Jun., 2003
1
www.anpec.com.tw
Industrial Control Electronics
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