APW7036
Advanced Dual PWM Power Controller
Features
General Description
The APW7036 provides complete power control and
protection for two DC-DC converter optimized in VGA
Card applications. It integrates two PWM controllers ,
as well as the monitoring and protection function into
a single package.
The APW7036 provides simple , single feedback loop
, voltage mode control with fast transient response.
The output voltage of the SYNC converter can be pre-
cisely regulated to as low as VREF (1.25V , 1.5V , 1.
8V and 2.05V) , with a maximum tolerence of ±1.0%
over temperature.
The APW7036 can provides in excess of 14A of out-
put current for an on-board DC/DC converter. It can
monitors all the output voltage , and a single Power
Good signal is issued when the SYNC output is within
±10% of the VREF setting and the ASYNC output lev-
els is above under-voltage levels. Additional built-in
over-voltage protection for the SYNC output uses the
lower MOSFET to prevent output voltage above 115%
of the VREF setting. The PWM controller’s over-cur-
rent function monitor the output current by sensing
•
2 Regulated Voltage are provided
− SYNC Switching Power Internal Reference
Voltage (1.25V , 1.5V , 1.8V and 2.05V)
− ASYNC Switching Power Internal Reference
Voltage (1.5V)
•
•
Simple Single-Loop Control Design
− Voltage-Mode PWM Control
Excellent Output Voltage Regulation
− SYNC Output : ±1% Over Temperature
− ASYNC Output : ±3% Over Temperature
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
the voltage drop across the upper MOSFET’s RDS(ON)
eliminating the need for a current sensing resistor .
,
− Constant Frequency Operation(200kHz)
− Programmable Oscillator from 50kHz to 800kHz
− Reduce External Component Count
20Pin , SOIC Package
Pin Description
UGATE
VCC
20
19
18
17
16
15
14
13
12
11
PHASE1
LGATE
PGND
OCSET1
VSEN
FB1
1
2
•
GATE
3
4
PHASE2
PGOOD
OCSET2
FB2
Applications
5
6
7
CO MP
NC
•
•
High Power 5V to 2.5 or 3.3V DC-DC Regulator
VGA Card Power Regulation
SS
8
GND
FAULT/RT
NC
9
10
VAUX
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.1 - May, 2001
1
www.anpec.com.tw