IR3721 International Rectifier, IR3721 Datasheet - Page 3

• Manufacturer Part Number: IR3721
• Description: Power Monitor IC
• Manufacturer: International Rectifier

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BLOCK DIAGRAM
IC PIN DESCRIPTION
Page 3 of 16
NAME
VCS
VO
VRT
GND
VDD
GND
GND
DI
VK
VDD
BASE PAD
NUMBER
10
1
2
3
4
5
6
7
8
9
VCS
VO
V
RT
I/O LEVEL
Analog
Analog
Analog
3.3V
Analog
1.8V
3.3V
I
REF
I
REF
DESCRIPTION
Current sensing input, connect through resistor to sensing node
Current sensing reference connect to output voltage
R
Bias return and signal reference
IC bias supply
Connect to pin 4
Connect to pin 4
Power Monitor output; connect to output filter
Connect to fixed voltage or VO, multiplied by DI to become analog output
Connect to pin 5
Connect to pin 4
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T
VCS
VO
thermistor network from this pin to GND programs thermal monitor
TruePower™
IR3721
GND
VDD
result out/
result out
DI
VK
DATA SHEET
IR3721
07/14/08