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SC1101CS 数据表(PDF) 3 Page - Semtech Corporation |
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SC1101CS 数据表(HTML) 3 Page - Semtech Corporation |
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3 / 8 page ![]() SC1101 © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 VOLTAGE MODE PWM CONTROLLER February 29, 2000 3 TEST CIRCUIT VOUT=1.25*(R3+R4)/R4 +5V +12V VOUT C9 0.1uF C1 0.1uF Q1 BUK556 L1 4uH R6 2.32k R5 1.00k R1 5mOhm D1 PSR16C30CT R2 10 C11 0.1uF C10 0.1uF U1 SC1101CS GND 8 VCC 1 CS(-) 2 CS(+) 3 PGND 4 DH 5 BST 6 FB 7 R3 See Table R4 See Table + C5 1500uF + C6 1500uF + C7 1500uF + C8 1500uF + C4 1500uF + C3 1500uF + C2 1500uF J1 J2 J3 J4 VOUT R3 R4 3.45 174 100 3.30 165 100 3.10 147 100 2.90 133 100 2.80 124 100 2.50 100 100 1.50 20 100 ELECTRICAL CHARACTERISTICS V CC = 4.75V to 5.25V; GND = PGND = 0V; VO = 3.3V; TA = 25°C; BST = 12V; Output current = 2A. Per test circuit, unless otherwise specified. PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Reference V REF 1.238 1.250 1.263 V Over Temp 1.225 1.250 1.275 V Feedback Bias Current I FB 2.0 8.0 uA Quiescent Current I Q Current into V CC pin 5.0 8.0 mA Regulation Load REG LOAD I O=1A to 12A 0.5 1.0 % Regulation Line REG LINE 0.5 % Current Limit Threshold CLT CS(+) to CS(-) 60 70 80 mV Oscillator Frequency OSC 180 200 220 kHz Oscillator Frequency Shift OFS V FB < VREF/2 50 kHz Max Duty Cycle d.c. 90 95 % DH Sink/Source Current I O V BST - VDH = 4.5V (V DH - VPGND = 2V) 500 mA UVLO Threshold V UVLO 3.8 V |
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