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SC1154CSW датащи(PDF) 5 Page - Semtech Corporation |
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SC1154CSW датащи(HTML) 5 Page - Semtech Corporation |
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5 / 18 page ![]() SC1154 PROGRAMMABLE SYNCHRONOUS DC/DC HYSTERETIC CONTROLLER FOR ADVANCED PROCESSORS © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 PRELIMINARY - March 1, 2000 5 ELECTRICAL CHARACTERISTICS (cont.) Unless specified: 0 < T J < 125°C, VIN = 12V PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SOFT START Charge Current I CHG V SS = 0.5V, resistance from VREFB pin to AGND = 20k Ω, V REFB = 1.3V Note: I CHG = (IVREFB / 5) 10.4 13 15.6 µA Discharge Current Idischg V (S/S) = 1V 1 mA INHIBIT COMPARATOR Start Threshold Vstart INH 12.0 2.4 V VIN12V UVLO Start Threshold Vstart UVLO 9.25 10 10.75 V Hysteresis Vhys UVLO 1.8 2 2.2 V HYSTERETIC COMPARATOR Input Offset Voltage Vos HYSCMP V DROOP pin grounded 5 mV Input Bias Current Ibias HYSCMP 1µA Hysteresis Accuracy V HYS_ACC 7mV Hysteresis Setting V HYS_SET 60 mV DROOP COMPENSATION Initial Accuracy V DROOP_ACC V DROOP = 50mV 5 mV OVERCURRENT PROTECTION OCP Trip Point V OCP 0.09 0.1 0.11 V Input Bias Current Ibias OCP 100 nA HIGH-SIDE VDS SENSING Gain 2V/V Initial Accuracy V IOUT_ACC V HISENSE = 12V, VIOUTLO = 11.9V 6 mV IOUT Source Isource IOUT V IOUT = 0.5V, VHISENSE = 12V, V IOUTLO = 11.5V 500 µA IOUT Sink Current Isink IOUT V IOUT = 0.05V, VHISENSE = 12V, V IOUTLO = 12V 40 50 µA Output Voltage Swing V HISENSE = 11V, R IOUT = 10k0hm 03.75 V |
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