Power Monitor ICs
IR’s IR3721 Real-time Power Monitoring IC Accurately Captures Highly Dynamic Power Information and Maximizes System Performance
The IR3721 output power monitor IC for low-voltage DC-DC converters used in notebook, desktop computers, and energy-efficient server applications, utilizes IR’s patent-pending TruePowerTM technology to accurately capture highly dynamic power information with 2.5 percent accuracy at 65°C.
The IR3721 measures dynamic power at the output/load side of voltage regulators to deliver a significant improvement in dynamic power measurement accuracy compared to competing power monitor ICs. TruePowerTM technology addresses dynamic errors which can account for more than a 30% error in competing solutions which monitor voltage and current separately in dynamic conditions with independent A/D conversion.
The IR3721 power monitor IC monitors the output filter inductor current in a buck or multiphase converter from 0.5 V to 1.8 V and provides the options of using resistive sensing or inductor DCR current sensing with an internal thermal compensation feature to achieve one percent higher efficiency compared to existing solutions while reducing bill of materials and board size requirements.
Accurate TruePower™ monitor
- 2.5% static accuracy at 65°C
- minimizes dynamic errors
Minimizes power dissipation
- monitors both power or current at DC-DC converter output
- single phase or multiphase low voltage buck converters (0.5 – 1.8 V)
- inductor DCR or resistive shunt sensing
Simple add-on to existing converters
10 pin 3x3 DFN lead free package
Accurately reflects dynamic and static power
Maximizes system performance
– Within a given power envelope
Predicts the thermal environment
Minimizes system power dissipation
||Bias Supply Voltage
||2.5% @ 65°C
||0.5 - 1.8 V
||5 mV - 150 mV
||+3.3V +/- 5%
||0 °C to 125 °C
||10 L 3x3 DFN
IR’s optimized power management system solutions deliver benchmark power density, efficiency and performance to meet the challenge of dramatically reducing annual kilowatt-hour savings and annual operating costs for data centers without the design trade-offs of technologies and performance versus cost and ease-of-design.