鈥?/div>
Linear2 Regulator for NVVDD(2.05V)
General Description
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
鹵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鈥檚 R
DS(ON)
, eliminating the need
for a current sensing resistor.
鈥?/div>
鈥?/div>
Simple Single-Loop Control Design
鈥?/div>
Voltage-Mode PWM Control
Excellent Output Voltage Regulation
鈥?/div>
PWM Output:
鹵1%
鈥?/div>
Linear Output:
鹵3%
鈥?/div>
Fast Transient Response
鈥?/div>
High-Bandwidth Error Amplifier
鈥?/div>
Full 0% to 100% Duty Ratio
鈥?/div>
Power-Good Output Voltage Monitor
鈥?/div>
Over-Voltage and Over-Current Fault Monitors
鈥?/div>
Small Converter Size
鈥?/div>
Constant Frequency Operation(200kHz)
鈥?/div>
Programmable Oscillator from 50kHz to 1MHz
鈥?/div>
Reduce External Component Count
Pin Description
Applications
VCC
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
UGATE
PHASE
LGATE
PGND
OCSET
VSEN1
FB
COMP
VSEN3
DRIVE3
GND
VAUX
鈥?/div>
鈥?/div>
鈥?/div>
DRIVE2
Motherboard Power Regulation for Computers
Low-Voltage Distributed Power Supplies
VGA Card Power Regulation
NC
NC
NC
NC
NC
PGOOD
VSEN2
SS
FAULT
NC
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
錚?/div>
ANPEC Electronics Corp.
Rev.P.1 - Mar., 2001
1
www.anpec.com.tw
APW7025 PDF文件相關(guān)型號
APW7026,APW7035,APW7036,APW7037
APW7025相關(guān)型號PDF文件下載
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