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IR3721

International Rectifier
Part Number IR3721
Manufacturer International Rectifier
Description Power Monitor
Published Jun 7, 2009
Detailed Description IR3721 DATA SHEET Power Monitor IC with Analog Output FEATURES „ Accurate TruePowerTM monitor • 2.5% static accuracy • ...
Datasheet PDF File IR3721 PDF File

IR3721
IR3721

Overview
IR3721 DATA SHEET Power Monitor IC with Analog Output FEATURES „ Accurate TruePowerTM monitor • 2.
5% static accuracy • Minimizes dynamic errors „ Minimizes power dissipation • 5mV - 150mV full scale current range „ Versatile • Monitors power or current • Single buck or multiphase converters • Inductor DCR or resistive shunt sensing „ Simple add-on to existing converters „ 10 pin 3x3 DFN lead free package „ RoHS compliant DESCRIPTION The IR3721 is a versatile power or current monitor IC for low-voltage DC-DC converters.
The IR3721 monitors the inductor current in buck or multiphase converters using either a current sensing resistor or the inductor’s winding resistance (DCR).
The output (DI) is a pulse code modulated signal whose duty ratio is proportional to the inductor current.
An analog voltage that is proportional to power is realized by connecting VK to VO and connecting an RC filter to DI.
The IR3721 uses Patent Pending TruePowerTM technology to accurately capture highly dynamic power waveforms typical of microprocessor loads.
TYPICAL APPLICATION CIRCUIT ORDERING INFORMATION Device IR3721MTRPBF * IR3721MPBF Package 10 lead DFN (3x3 mm body) 10 lead DFN (3x3 mm body) * Samples only Page 1 of 16 www.
irf.
com Order Quantity 3000 piece reel 121 piece tube 09/15/08 IR3721 DATA SHEET ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings (Referenced to GND) VDD: 3.
9V All other Analog and Digital pins .
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3.
9V Operating Junction Temperature .
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.
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-10°C to 150°C Storage Temperature Range -65°C to 150°C ESD Rating .
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HBM Class 2 JEDEC Standard MSL Rating Level 2 Reflow Temperature .
.
260°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
These are stress ratings only and functional operation of the device at these or any oth...


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