APW7036 Datasheet, PDF (1/11 Pages) Anpec Electronics Coropration – Advanced Dual PWM Power Controller

APW7036
Advanced Dual PWM Power Controller
Features
General Description
• 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
− Constant Frequency Operation(200kHz)
− Programmable Oscillator from 50kHz to 800kHz
− Reduce External Component Count
• 20Pin , SOIC Package
Applications
• High Power 5V to 2.5 or 3.3V DC-DC Regulator
• VGA Card Power Regulation
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 V_REF (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 V_REF 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 V_REF setting. The PWM controller’s over-cur-
rent 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 .
Pin Description
UGATE
1
VCC
2
GATE
3
PHASE2
4
PGOOD
5
OCSET2
6
FB2
7
SS
8
FAULT/RT
9
NC
10
20
PHASE1
19
LGATE
18
PGND
17
OCSET1
16
VSEN
15
FB1
14
COMP
13
NC
12
GND
11
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.
1
Rev. A.1 - May, 2001
www.anpec.com.tw