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ADM1270ACPZ-R2 数据表(PDF) 4 Page - Analog Devices |
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ADM1270ACPZ-R2 数据表(HTML) 4 Page - Analog Devices |
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4 / 21 page  ADM1270 Data Sheet Rev. A | Page 4 of 21 Parameter Symbol Min Typ Max Unit Test Conditions/Comments CURRENT SENSE VOLTAGE Sense Voltage Current Limit (VSENSE+ − VSENSE−) VSENSECL 47 50 53 mV VISET > 2.65 V, VFLB > 1.1 V, ΔVGATE = 3 V, IGATE = 0 µA Foldback Inactive 62.5 mV VISET = 2.5 V, VFLB > 1.35 V, ΔVGATE = 3 V, IGATE = 0 µA 47 50 53 mV VISET = 2 V, VFLB > 1.1 V, ΔVGATE = 3 V, IGATE = 0 µA 22.5 25.0 27.5 mV VISET = 1 V, VFLB > 0.57 V, ΔVGATE = 3 V, IGATE = 0 µA 10.0 12.5 15.0 mV VISET = 0.5 V, VFLB > 0.3 V, ΔVGATE = 3 V, IGATE = 0 µA Foldback Active 7 10 13 mV VFLB = 0 V, ΔVGATE = 3 V, IGATE = 0 µA 22 25 28 mV VISET > 2 V, VFLB = 0.5 V, ΔVGATE = 3 V, IGATE = 0 µA Circuit Breaker Offset VCBOS 0.5 1 1.5 mV Circuit breaker trip voltage, VCB = VSENSECL − VCBOS SEVERE OVERCURRENT Voltage Threshold VSENSEOC 90 100 110 mV VISET > 2.65 V 20 25 30 mV VISET = 0.5 V Glitch Filter Duration 0.4 1.6 µs Response Time 2.0 3.5 µs TIMER PIN TIMER Pull-Up Current ITIMERUP −18 −20 −22 µA Overcurrent fault, 0.2 V ≤ VTIMER ≤ 2 V TIMER High Threshold VTIMERH 1.96 2.0 2.04 V TIMER Low Threshold VTIMERL 0.075 0.10 0.12 V TIMER Pull-Down Current ITIMERPD 0.85 1.15 µA Timer pin voltage = 0.2 V 75 105 µA Timer pin voltage = 0.05 V TIMER_OFF PIN Power-On Reset Pull-Up Current IPOR −18 −20 −22 µA Initial power-on reset, VTIMER_OFF = 1 V Retry Pull-Up Current ITMROFF −0.85 −1 −1.15 µA After fault when GATE is off, VTIMER_OFF = 1 V TIMER_OFF High Threshold VTMROFFH 1.96 2.0 2.04 V FOLDBACK (FLB PIN) Input Current IFLB 0.005 0.2 µA VFLB ≤ 5.5 V, TA = −40°C to +85°C 0.005 1 µA VFLB ≤ 5.5 V, TA = −40°C to +125°C PWRGD FEEDBACK INPUT (FB_PG PIN) Input Current IFBPG 0.005 0.2 µA VFB_PG ≤ 5.5 V, TA = −40°C to +85°C 0.005 1 µA VFB_PG ≤ 5.5 V, TA = −40°C to +125°C PWRGD Rising Threshold VPGTH 0.985 1.0 1.015 V FB_PG rising PWRGD Threshold Hysteresis PGHYST 25 30 35 mV Power-Good Glitch Filter PGGF 0.5 1.5 µs 50 mV overdrive FAULT PIN Output Low Voltage VOL_FAULT 0.1 V IFAULT = 100 µA 0.4 V IFAULT = 1 mA Leakage Current IFAULT 0.005 1 µA VFAULT = 5.5 V, FAULT output high-Z ENABLE PIN Input High Voltage VIH 1.2 V Input Low Voltage VIL 0.4 V Leakage Current IEN 0.005 1 µA VEN = 5.5 V PWRGD PIN Output Low Voltage VOL_PWRGD 0.1 V IPWRGD = 100 µA 0.4 V IPWRGD = 1 mA Output Low Voltage VOL_PWRGD 0.4 V VCC = 1.7 V, ISINK = 100 µA, Leakage Current IPWRGD 0.005 1 µA VPWRGD = 60 V, PWRGD output high-Z |
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