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LTC4244IGN 数据表(PDF) 10 Page - Linear Technology |
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LTC4244IGN 数据表(HTML) 10 Page - Linear Technology |
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10 / 28 page ![]() 10 LTC4244/LTC4244-1 42441f BLOCK DIAGRA + – + – +– 5VOUT TIMER_LO ≥ 50mV TIMER_HI ≥ 150mV CP_OFF VCC 67 µA 60 µA 3.3VIN 5VIN 3.3VSENSE 5VSENSE GATE 50mV +– + – +– 3.3VOUT TIMER_LO ≥ 50mV TIMER_HI ≥ 150mV 50mV 5V CURRENT FAULT VEEIN REF 3.3V CURRENT FAULT 13 OFF/ON 14 15 16 17 FAULT DRIVE SQ R TIMER CP_OFF THERMAL FAULT CP_OFF CP_OFF THERMAL FAULT VEE CURRENT FAULT 12V CURRENT FAULT VCC 21 µA CP_OFF VCC 12VIN VCC THERMAL FAULT TIMER_LO TIMER_HI TIMER_HI Q SQ RQ THERMAL FAULT 5V CURRENT FAULT 3.3V CURRENT FAULT VEE CURRENT FAULT 12V CURRENT FAULT 4 6 GND 8 8 µs RISING EDGE DELAY 46 µs FALLING EDGE DELAY 25 µs RISING EDGE DELAY 14 µs FALLING EDGE DELAY 12V SWITCH CONTROL CHARGE PUMP VEE SWITCH CONTROL THERMAL SHUTDOWN VCC REF REFERENCE UVL MONITOR RESET VCC UVL 5 PWRGD 7 RESETIN 9 12VIN 1 VEEIN 2 RESETOUT 10 4R 5VIN R 11 PRECHARGE 12 12VOUT 20 5VOUT 3 3.3VOUT 18 VEEOUT 4244 BD 19 POWER GOOD MONITOR REF CP_OFF VCC |
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