IR3720MTRPBF International Rectifier, IR3720MTRPBF Datasheet - Page 9

• Manufacturer Part Number: IR3720MTRPBF
• Description: IC POWER SUPPLY MONITOR 10-DFN
• Manufacturer: International Rectifier
• Series: TruePower™r

Specifications of IR3720MTRPBF

• Package / Case: 10-DFN
• Mounting Type: Surface Mount
• Current - Supply: 480µA
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: 0°C ~ 125°C
• Applications: Power Supply Monitor
• Voltage - Input: -
• Input Voltage: 3.3V
• No. Of Outputs: 1
• Supply Voltage Range: 3.135V To 3.465V
• No. Of Pins: 10
• Operating Temperature Range: 0°C To +125°C
• Filter Terminals: SMD
• Input Voltage Primary Max: 3.3V
• Rohs Compliant: Yes
• Frequency: 400kHz
• Package: 10 Lead 3x3 DFN
• Vk Range: 0.5V - 1.8V
• Bias Supply Voltage: +3.3V +/-5%
• Junction Temperature: 0oC to 125oC
• Pbf: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Input: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

RESISTOR SENSING APPLICATION
The voltage on the shunt resistor of the circuit below
is directly proportional to the current from the source.
Shunts developing 5 mV to 75 mV at I
used. Accuracy is enhanced at the higher voltage.
Select R
tolerance resistor. This value will sink 1.5V /R
current from the VREF pin of the IR3720.
Page 9 of 20
T
to be a 25.5 kΩ 1% or better initial
Vin
VDD
Bypass
VDD
Cap
Phase
R
T
FS
Figure 2 Resistor Sensing Circuit
have been
www.irf.com
V
T
REF
R
of
I
CS2
L
L
VCS
DCR
C
CS2
R
it develops the same voltage that is developed by the
shunt at full scale current.
C
between 0.1 μF and 10 μF.
IR3720
CS2
CS2
should be chosen such that this current through
is the integrator capacitor and should be
VO
GND
SHUNT
VDD
VO
EXTCLK
SCL
ADDR
SDA
ALERT#
09/09/08