IR3721MTRPBF International Rectifier, IR3721MTRPBF Datasheet - Page 8

• Manufacturer Part Number: IR3721MTRPBF
• Description: IC POWER SUPPLY MONITOR 10-DFN
• Manufacturer: International Rectifier
• Series: TruePower™r

Specifications of IR3721MTRPBF

• Applications: Power Supply Monitor
• Voltage - Supply: 3.135 V ~ 3.465 V
• Current - Supply: 350µA
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 10-DFN
• Quiescent Current: 450µA
• Bandwidth: 589kHz
• Sensor Case Style: DFN
• No. Of Pins: 10
• Supply Voltage Range: 3.135V To 3.465V
• Operating Temperature Range: 0°C To +125°C
• Filter Terminals: SMD
• Rohs Compliant: No
• Accuracy %: 2.5%
• Package: 10 Lead 3x3 DFN
• Static Accuracy: 2.5% @ 65oC
• Vk Range: 0.5V - 1.8V
• Vcs Range: 5mV - 150mV
• Bias Supply Voltage: +3.3V +/-5%
• Junction Temperature: 0oC to 125oC
• Pbf: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -
• Other names: IR3721MTRPBFTR

RESISTOR SENSING APPLICATION
The Resistor Sensing Circuit shown below is an
example of resistive current sensing. Because the
voltage on the shunt resistor is directly proportional to
the current I
not need to match the L / DCR time constant.
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VDD
Converter
L
Buck
through the inductor, R
Phase 1
Return
Power
VDD
Bypass
Cap
R
T
V
RT
CS2
I
L
L
and C
Figure 4 Resistor Sensing Circuit
www.irf.com
CS2
DCR
VDD
do
R
CS2
IR3721
VCS
GND
SHUNT
C
Because the value of the shunt resistance does not
change with temperature as the inductor DCR does,
R
CS2
T
can be a fixed resistor.
VO
DI
VK
VO
DATA SHEET
Power
IR3721
09/15/08