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Anpec Electronics Coropration

APW7025 Datasheet Preview

APW7025 Datasheet

Advanced PWM and Dual Linear Power Control

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APW7025
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)
www.DataSheet4U.com Linear2 Regulator for NVVDD(2.05V)
Simple Single-Loop Control Design
Voltage-Mode PWM Control
Excellent Output Voltage Regulation
PWM Output: ±1%
Linear Output: ±3%
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 1MHz
Reduce External Component Count
Applications
Motherboard Power Regulation for Computers
Low-Voltage Distributed Power Supplies
VGA Card Power Regulation
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.
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 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.
Pin Description
VCC
DRIVE2
NC
NC
NC
NC
NC
PGOOD
VSEN2
SS
FAULT
NC
1
2
3
4
5
6
7
8
9
10
11
12
24 UGATE
23 PHASE
22 LGATE
21 PGND
20 OCSET
19 VSEN1
18 FB
17 COMP
16 VSEN3
15 DRIVE3
14 GND
13 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




Anpec Electronics Coropration

APW7025 Datasheet Preview

APW7025 Datasheet

Advanced PWM and Dual Linear Power Control

No Preview Available !

APW7025
Ordering Information
APW7025
Handling Code
Temp. Range
Package Code
Package Code
K : SOP - 24
Temp. Range
C : 0 to 70°C
Handling Code
TU : Tube
TR : Tape & Reel
Blockwww.DataSheet4U.com Diagram
VAUX
VSEN3
DRIVE3
× 0.75
+
1.26V
-
-
+
LUV
LINEAR
UNDER-
VOLTAGE
VSEN1
× 1.10
× 0.90
+
-
+
-
× 1.15
+
-
OCSET
200µA
VCC
Power-on
Reset
(POR)
VSEN2
DRIVE2
-
+
+
1.5V
-
INHIBIT
SOFT
START &
OV
-
FAULT
FAULT
LOGIC
+
OSCILLATOR
FAULT
ERROR
AMP1
+
-
VCC
+ 1.25V
28µA -
4.5V
SS FB
OC1 +
-
+
- PWM
COMP1
DRIVER1
VCC
INHIBIT
PWM1
GATE
CONTROL
SYNCH
DRIVE
VCC
COMP
VAUX
PGOOD
UGATE
PHASE
LGATE
PGND
GND
Absolute Maximum Ratings
Symbol
VCC
VI , VO
TA
TJ
TSTG
TS
Parameter
Supply Voltage
Input , Output or I/O Voltage
Operating Ambient Temperature Range
Junction Temperature Range
Storage Temperature Range
Soldering Temperature
Copyright ANPEC Electronics Corp.
Rev. P.1 - Mar., 2001
2
Rating
15
GND -0.3 V to VCC +0.3
0 to 70
0 to 125
-65 to +150
300 ,10 seconds
Unit
V
V
°C
°C
°C
°C
www.anpec.com.tw


Part Number APW7025
Description Advanced PWM and Dual Linear Power Control
Maker Anpec Electronics Coropration
Total Page 6 Pages
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