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APW7062B

Description
Synchronous Buck PWM Controller
File Size230KB,18 Pages
ManufacturerAnpec
Websitehttp://www.anpec.com.tw/
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APW7062B Overview

Synchronous Buck PWM Controller

APW7062B
Synchronous Buck PWM Controller
Features
Simple Single-Loop Control Design
- Voltage-Mode PWM Control
Fast Transient Response
- Full 0–100% Duty Ratio
Excellent Output Voltage Regulation
- 0.8V Internal Reference
-
±
1% Over Line Voltage and Temperature
General Description
The APW7062B is a voltage mode, synchronous PWM
controller which drives dual N-Channel MOSFETs. It
integrates the control, monitoring and protection func-
tions into a single package, provides one controlled
power outputs with under-voltage and over-current
protection.
APW7062B provide excellent regulation for output load
variation. An internal 0.8V temperature-compensated
reference voltage is designed to meet the requirement
of low output voltage applications. It includes a 200kHz
free-running triangle-wave oscillator that is adjustable
from 70kHz to 800kHz.
The power-on-reset (POR) circuit monitors the VCC,
EN, OCSET input voltage to start-up or shutdown the
IC. The over-current protection (OCP) monitors the
output current by using the voltage drop across the
upper MOSFET’s R
DS(ON)
, eliminating the need for a
current sensing resistor. The under-voltage protection
(UVP) monitors the voltage of FB pin for short-circuit
protection.
The over-current protection trip cycle the soft-start func-
tion until the fault events be removed. Under-voltage
protection will shutdown the IC directly.
Over Current Fault Monitor
- Uses Upper MOSFETs R
DS (ON)
Converter Can Source and Sink Current
Small Converter Size
- 200kHz Free-Running Oscillator
- Programmable from 70kHz to 800kHz
14-Lead SOIC Package
Lead Free Available (RoHS Compliant)
Applications
Graphic Cards
DDR Memory Power Supply
DDR Memory Termination Voltage
Low-Voltage Distributed Power Supplies
Pinouts
RT
OCSET
SS
COMP
FB
EN
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
VCC
PVCC
LGATE
PGND
BOOT
UGATE
PHASE
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.3 - Mar., 2005
1
www.anpec.com.tw

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