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SC417 Datasheet(PDF) 5 Page - Semtech Corporation |
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SC417 Datasheet(HTML) 5 Page - Semtech Corporation |
5 / 29 page SC417/SC427 5 Electrical Characteristics (continued) Parameter Conditions Min Typ Max Units Input Supplies (continued) V5V Supply Current ENL , EN/PSV = 0V 3 7 μA SC417, EN/PSV = V5V, no load (f SW = 25kHz), V FB > 500mV(2) 2 mA SC427, EN/PSV = V5V, no load, V FB > 500mV(2) 0.7 f SW = 250kHz, EN/PSV = floating , no load(2) 10 FB On-Time Threshold static V IN and load, 0 to +85 °C 0.496 0.500 0.504 V static V IN and load, -40 to +85 °C 0.495 0.505 V Frequency Range continuous mode operation 200 1000 kHz minimum f SW , (SC417 only), EN/PSV = V5V, no load 25 Bootstrap Switch Resistance 10 Ω Timing On-Time continuous mode operation, V IN = 15V, V OUT = 5V, f SW = 300kHz, R TON = 133kΩ 999 1110 1220 ns Minimum On-Time (2) 50 ns Minimum Off-Time (2) 250 ns Soft-Start Soft-Start Ramp Time (2) 850 μs Analog Inputs/Outputs VOUT Input Resistance 500 kΩ Current Sense Zero-Crossing Detector Threshold LX - PGND -3 0 +3 mV Power Good Power Good Threshold upper limit, V FB > internal 500mV reference +20 % lower limit, V FB < internal 500mV reference -10 % Start-Up Delay Time 2ms Fault (noise immunity) Delay Time(2) 5μs Leakage 1μA Power Good On-Resistance 10 Ω |
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