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LTC1645I Datasheet(PDF) 11 Page - Linear Technology |
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LTC1645I Datasheet(HTML) 11 Page - Linear Technology |
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11 / 24 page  11 LTC1645 APPLICATIO S I FOR ATIO (a) VCC Short-Circuit Supply Current Glitch Without Any Limiting (b) VCC Supply Glitch Without Any Limiting (c) VCC Short-Circuit Supply Current Glitch with 2 µH Series Inductor (d) VCC Supply Glitch with 2µH Series Inductor Figure 8. Supply Glitch Supply Glitching LTC1645 Hot Swap circuits on the backplane are generally used to provide power-up/down sequence at insertion/ removal as well as overload/short-circuit protection. If a short-circuit occurs at supply ramp-up, the circuit breaker trips. The partially enhanced FET is easily disconnected without any supply glitch. If a dead short occurs after a supply connection is made (Figure 8), the sense resistor R1 and the RDS(ON) of the fully enhanced FET provide a low impedance path for 0.1 µF 1645 F08 10 Ω R1 0.01 Ω 12V IRF7413 2 µH + – LTC1645 SUPPLY GLITCH 100 µF + 1 µs/DIV 1645 F08a 1 µs/DIV 1645 F08b VCC GATE 1 µs/DIV 1645 F08c 1 µs/DIV 1645 F08d GATE VCC |
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