CAT2300

CAT2300 Current Monitor for 0.9 V 1.5 V Bus Description CAT2300 is a controller for MOSFET current monitoring in high-side switch applications. CAT2300 provides current mirroring and ON/OFF control for MOSFETs. Exact control and matching of the Sense output of the MOSFET with the Kelvin voltage insures accurate current monitoring over a couple of decades of current. CAT2300 is the single chip alternative to discrete circuits for monitoring and controlling 0.9 V − 1.5 V power busses. When teamed with a MOSFET, CAT2300 will track currents up to 25 A and resolve currents below 100 mA. CAT2300 provides logic level ON/OFF control of the power MOSFET and its own internal circuitry, reducing power consumption to virtually zero milliwatts. CAT2300 operates over the full industrial temperature range of −40°C to +85°C. Features Precision Current Measurement of 0.9 V − 1.5 V Power Supply Rails ON/OFF Power FET Control with Soft−start Sense Current Mirroring to 70 mA (equal to 25 A flowing in the power bus) User Adjustable Current to Voltage Conversion Ratio 150 mV Typical Matching between Kelvin and Sense Leads Less than 1 mA Current Consumption in Shutdown Mode This Device is Pb−Free, Halogen Free/BFR Free and RoHS Compliant Typical Applications Portable Computers Backplane Bus Control Power Distribution Power Bus SENSEFET System Load Enable CAT2300 IMEASURE Figure 1. System Application www.onsemi.com 1 TDFN8 VP2 SUFFIX CASE 511AK PIN CONFIGURATION Sens...