Description

The MAX4210/MAX4211 low-cost, low-power, high-sidepower/current monitors provide an analog output voltageproportional to the power consumed by a load bymultiplying load current and source voltage. TheMAX4210/MAX4211 measure load current by using ahigh-side current-sense amplifier, making them especiallyuseful in battery-powered systems by not interferingwith the ground path of the load.The MAX4210 is a small, simple 6-pin power monitorintended for limited board space applications. TheMAX4210A/B/C integrate an internal 25:1 resistor-dividernetwork to reduce component count. The MAX4210D/E/Fuse an external resistor-divider network for greater designflexibility.The MAX4211 is a full-featured current and power monitor.The device combines a high-side current-senseamplifier, 1.21V bandgap reference, and two comparatorswith open-drain outputs to make detector circuitsfor overpower, overcurrent, and/or overvoltage conditions.The open-drain outputs can be connected topotentials as high as 28V, suitable for driving high-sideswitches for circuit-breaker applications.Both the MAX4210/MAX4211 feature three different current-sense amplifier gain options: 16.67V/V, 25.00V/V, and40.96V/V. The MAX4210 is available in 3mm x 3mm, 6-pinTDFN and 8-pin µMAX® packages and the MAX4211 isavailable in 4mm x 4mm, 16-pin thin QFN and 16-pinTSSOP packages. Both parts are specified for the -40°Cto +85°C extended operating temperature range.ApplicationsBaseband Analog MultipliersMeasurement InstrumentationOverpower Circuit BreakersPower-Level DetectorsPower-Supply DisplaysShort-Circuit ProtectionSmart Battery Packs/ChargersSmart Peripheral ControlVGA Circuits