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APW7045 PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 APW7045
部品説明 Advanced PWM and Linear Power Controller
メーカ ANPEC
ロゴ ANPEC ロゴ 



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APW7045 Datasheet, APW7045 PDF,ピン配置, 機能
APW7045
Advanced PWM and Linear Power Controller
Features
General Description
2 Regulated Voltage are provided
Switching Power for Fixed Voltage (1.0V)
Linear Regulator for VMEM(2.5V)
Simple Single-Loop Control Design
Voltage-Mode PWM Control
Excellent Output Voltage Regulation
PWM Output: ±1%
Linear Output: ±3%
Fast Transient Response
High-Bandwidth Error Amplifier
Full 0% to 100% Duty Ratio
Power-Good Output Voltage Monitor
Over-Voltage and Over-Current Fault Monitors
Small Converter Size
200KHz Free-Running Oscillator ;
Progammable from 50KHz to 800KHz
Reduce External Component Count
The APW7045 integrates PWM controller and linear
controller, as well as the monitoring and protection
functions into a single package, which provides two
controlled power outputs with over-voltage and over-
current protections. The PWM controller regulates
the DDR termination voltage (1.25V) or GPU Voltage
(2.05V) with a synchronous-rectified buck converter.
The linear controller regulates the Memory Voltage
(2.5V). The pre cision reference and voltage-mode
PWM control provide ±1% static regulation. The lin-
ear controller drives an external N-channel MOSFET
to provide adjustable voltage. The APW7045 moni-
tors two output voltages, and a single Power Good
signal is issued when the PWM voltage is within ±10%
of the DAC setting and the lineat regulator output level
is above under-voltage threshold. Additional built-in
over-voltage protection for the PWM output uses the
lower MOSFET to prevent output voltages above 115%
of the DAC setting. The PWM over-current function
monitors the output current by using the voltage drop
across the upper MOSFET’s R , eliminating the
DS(ON)
need for a current sensing resistor.
Pin Description
Applications
Motherboard Power Regulation for Computers
Low-Voltage Distributed Power Supplies
VGA Card Power Regulation
DDR SDRAM Power Regulation
VCC
DRIVE
PGOOD
SD
FB2
SS
FAULT
GND
1
2
3
4
5
6
7
8
16 UGATE
15 PHASE
14 LGATE
13 PGND
12 OCSET
11 VSEN1
10 FB1
9 COMP
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 - Jan., 2003
1
www.anpec.com.tw

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