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APW7025KC-TR

更新时间: 2024-01-07 16:29:52
品牌 Logo 应用领域
茂达 - ANPEC /
页数 文件大小 规格书
6页 62K
描述
Advanced PWM and Dual Linear Power Control

APW7025KC-TR 数据手册

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APW7025  
Advanced PWM and Dual Linear Power Control  
Features  
General Description  
The APW7025 integrates a PWM controller and Dual  
linear controller, as well as the monitoring and pro-  
tection functions into a single package , which pro-  
vides three controlled power outputs with over-volt-  
age and over-current protections. The PWM control-  
ler regulates the DDR reference voltage with a syn-  
chronous-rectified buck converter. The linear control-  
ler regulates power for microprocessor core voltage  
and Memory Voltage.  
3 Regulated Voltage are provided  
Switching Power for VTT(1.25V)  
Linear1 Regulator for FBVDDQ(2.5V)  
Linear2 Regulator for NVVDD(2.05V)  
Simple Single-Loop Control Design  
Voltage-Mode PWM Control  
Excellent Output Voltage Regulation  
PWM Output: ±1%  
The precision reference and voltage-mode PWM  
control provide ±2% static regulation. The linear  
controller drives an external N-channel MOSFET to  
provide adjustable voltage.  
Linear Output:±3%  
Fast Transient Response  
The APW7025 monitors all the output voltages , and  
a single Power Good signal is issued when the PWM  
Voltage is within 10% of the 1.25V setting and the  
other output levels are above their under-voltage  
thresholds. Additional built-in over-voltage protec-  
tion for the PWM output uses the lower MOSFET to  
prevent output voltages above 115% of the 1.25V  
setting. The PWM over-current function monitors  
the output current by using the voltage drop across  
the upper MOSFET’s RDS(ON) , eliminating the need  
for a current sensing resistor.  
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  
Constant Frequency Operation(200kHz)  
Programmable Oscillator from 50kHz to 1MHz  
Reduce External Component Count  
Pin Description  
Applications  
VCC  
1
2
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
14  
13  
UGATE  
PHASE  
LGATE  
PGND  
DRIVE2  
NC  
Motherboard Power Regulation for Computers  
Low-Voltage Distributed Power Supplies  
VGA Card Power Regulation  
3
NC  
4
NC  
NC  
NC  
5
OCSET  
6
VSEN1  
FB  
7
8
PGOOD  
VSEN2  
SS  
COMP  
VSEN3  
DRIVE3  
GND  
9
10  
11  
12  
FAULT  
NC  
VAUX  
SOP24  
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.P.1 - Mar., 2001  
1
www.anpec.com.tw  

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