IR3725

IR3725 Data Sheet INPUT POWER MONITOR WITH DIGITAL INTERFACE www.datasheet4u.com FEATURES DESCRIPTION The IR3725 is a highly configurable power monitor IC that uses proprietary digital technology to measure a 12V rail current, its voltage, or its average power over a user specified time interval. Configuration and result reporting are managed through a serial digital interface. The current is measured as a voltage across a shunt resistance, an input inductor, or a copper trace resistance. The real time voltage and current signals are multiplied, digitized, and averaged over a user selectable averaging interval providing TruePower™ measurement of highly dynamic loads. „ Accurate power, current, or voltage reporting ƒ 1.5 % maximum power error ƒ 1.0 % maximum current error „ Serial digital interface ƒ SMBus and I2C compatible „ Programmable averaging interval „ Flexible current sensing ƒ Resistive or Inductor DCR „ Applications ƒ Synchronous rectified buck converters ƒ Multiphase converters „ 12pin 3x4 DFN lead free „ RoHS Compliant TYPICAL APPLICATION CIRCUIT +12V L Input Capacitors Buck Regulators 3.3V VDD To system Controller DCR CCS1 IR3725 VO I2C CCS2 ALERT# 2 VT VCS2 ADDR VCS1 GND RT 0.1 uF +12V Return ORDERING INFORMATION Device IR3725MTRPBF IR3725MPBF Package 12 lead DFN (4x3 mm body) 12 lead DFN (4x3 mm body) Order Quantity 3000 piece reel Sample Quantity Page 1 of 19 www.irf.com 2008_12_09 IR3725 Data Sheet ABSOLUTE MAXIMUM RATINGS All voltages...