ZXCT1081E5TA Diodes Incorporated

A Product Line of Diodes Incorporated ZXCT1081 HIGH VOLTAGE HIGH-SIDE CURRENT MONITOR Description Pin Assignments The ZXCT1081 is a high side current sense monitor with a gain of 10 and a voltage output. Using this device V 1 5 SENSE- eliminates the need to disrupt the ground plane when CC sensing a load current. 2 GND The wide input voltage range of 40V down to as low as 3V make it suitable for a range of applications including systems operating from industrial 24-28V rails and power OUT 3 4 SENSE+ supplies. Features Applications 3V to 40V continuous high side voltage Automotive current measurement Accurate high-side current sensing Industrial applications current measurement Output voltage scaling x10 Battery management Over current monitor 4.5V to 12V V range CC Power management Low quiescent current: Power adapters o 80 A supply pin o 30 A I + SENSE SOT23-5 package -40C to 125C ambient temperature range Typical Application Circuit V R IN SENSE 4 5 SENSE+ SENSE- V CC 1 V cc ZXCT1081 GND OUT 2 3 V OUT 1 of 11 March 2010 ZXCT1081 Diodes Incorporated www.diodes.com Document number: DS32102 Rev. 1 - 2 A Product Line of Diodes Incorporated ZXCT1081 Pin Description Pin Name Description 1 VCC This is the analogue supply and provides power to internal circuitry 2 GND Ground pin 3 OUT Output voltage pin. NMOS source follower with 20A bias to ground This is the positive input of the current monitor and has an input range from 40V 4 SENSE+ (60V transient) down to 3V. The current through this pin varies with differential sense voltage This is the negative input of the current monitor and has an input range from 40V 5 SENSE- (60V transient) down to 3V Absolute Maximum Ratings Parameter Rating Unit Continuous Voltage on SENSE+ and SENSE- -0.6 and 45 V Transient Voltage on SENSE+ and SENSE- -0.6 and 65 V Voltage On All Other Pins -0.6 and 14 V 800 mV Differential Sense Voltage, V SENSE Operating Temperature -40 to 125 C Storage Temperature -55 to 150 C Maximum Junction Temperature 125 C 300 T = 25C A Package Power Dissipation mW (de-rate to zero at 125C) Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for extended periods, may reduce device reliability Recommended Operating Conditions Symbol Parameter Min Max Units Common-Mode Sense+ Input Range 3 40 V V IN V Supply Voltage Range 4.5 12 V CC Differential Sense Input Voltage Range 0 0.15 V V SENSE Output Voltage Range 0 1.5 V V OUT Ambient Temperature Range -40 125 C T J 2 of 11 March 2010 ZXCT1081 Diodes Incorporated www.diodes.com Document number: DS32102 Rev. 1 - 2