APW7015 Datasheet, PDF (1/6 Pages) Anpec Electronics Coropration – Advanced PWM and Dual Linear Power Control

APW7015
Advanced PWM and Dual Linear Power Control
Features
General Description
• 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: ±2% Full Temperature
• Linear Output: ±3% Full Temperature
• Fast Transient Response
• High-Bandwidth Error Amplifier
• Full 0% to 100% Duty Ratio
• TTL-Compatible 3-Bit Digital-to-Analog Output
Voltage Selection
• 0.05V Steps from 1.3V_DC to 1.65V_DC
• 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
Applications
• Motherboard Power Regulation for Computers
• Low-Voltage Distributed Power Supplies
• VGA Card Power Regulation
The APW7015 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.
TTL Compatible 3-bit digital-to-analog converter
(DAC) that adjusts the output voltage from 1.3V_DC
to 1.65V in 0.05V steps is included in APW7015.
DC
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.
The APW7015 monitors all the output voltages, and
a single Power Good signal is issued when the PWM
Voltage is within 10% of the DAC 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 DAC
setting. The PWM over-current function 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.
Pin Description
VCC
1
24
DRIVE2
2
23
NC
3
22
NC
4
21
VID2
5
20
VID1
6
19
VID0
7
18
PGOOD
8
17
VSEN2
9
16
SS
10
15
FAULT
11
14
NC
12
13
UGATE
PHASE
LGATE
PGND
OCSET
VSEN1
FB
COMP
VSEN3
DRIVE3
GND
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. P.1 - Mar., 2001
www.anpec.com.tw