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参数资料
| 型号： | APW7047K |
| 厂商： | Anpec Electronics Corporation |
| 英文描述： | Dual Advanced PWM and Source-Sink Linear Controller |
| 中文描述： | 双先进PWM和源库线性控制器 |
| 文件页数： | 1/12页 |
| 文件大小： | 154K |
| 代理商： | APW7047K |
Copyright
ANPEC Electronics Corp.
Rev.A.1 - May., 2002
APW 7047
www.anpec.com.tw
1
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.
Features
3 Regulated Voltages are provided
SYNC. Buck Converter for VCORE
(1.15V~1.50V)
Standard Buck Converter for VMEM
(2.40V~2.75V)
Linear Controller with SOURCE-SINK
Regulation for VTT(1.25V)
Simple Single-Loop Control Design
Voltage-Mode PWM Control
Excellent Output Voltage Regulation
VCORE Output : ±2% Over Temperature
VMEM Output : ±2% Over Temperature
VTT Output : 1/2 VIN ±25mV Over
Temperature
Min. VIN = 1.7V
Fast Transient Response
Built-in Feedback Compensation
Full 0% to 100% Duty Ratio
Over-Voltage and Over-Current Fault Monitor
Constant Frequency Operation(200kHz)
24 pins, SOIC Package
Applications
M/B DDR Power Regulation
AGP/PCI Graphics Power Regulation
SSTL-2 Termination
General Description
The APW7047 provides the power controls and protec-
tions for three output voltages on AGP/PCI Graphic Card
applications. It integrates two PWM controllers , one
SOURCE-SINK linear controller, as well as the monitor
and protection functions into a single package. One PWM
converter (PWM1) regulates the VCORE(1.5V) for the GPU
with a SYNC. buck converter. The other standard buck
converter (PWM2) regulates the VMEM(2.5V) for the pow-
er of DDR memory. The SOURCE-SINK linear controller
control two external MOSFETs to be a linear regulator
with the capability of sourcing and sinking current. It reg-
ulates the VTT (1.25V) power for DDR Termination voltage.
Additional built-in over-voltage protection (OVP) will be
started when the VCORE or VMEM output is above 115%
of each DAC setting (V
CORE
and V
MEM
). OVP function will
shutdown the all output voltages until re-powering on the
IC. For each PWM converter, the over-current function
monitors the output current by sensing the voltage drop
across the MOSFET‘s r
DS(ON)
, eliminating the need for a
current sensing resistor.
Dual Advanced PWM and Source-Sink Linear Controller
Pin Description
1
2
3
4
5
6
7
8
20
19
18
17
16
15
14
13
VCC
UGATE1
PHASE1
SS
SD
SOURCE
SINK
FB
VIN
OCSET1
VSEN1
GND
UGATE 2
UGATE2
PHASE2
PHASE2
PGND
MEM2
MEM1
MEM0
CORE2
CORE1
CORE0
OCSET2
VSEN2
9
10
11
12
24
23
22
21
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