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LM43601QPWPTQ1 Datasheet(PDF) 7 Page - Texas Instruments |
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LM43601QPWPTQ1 Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 53 page  7 LM43601-Q1 www.ti.com SNVSAA0B – JULY 2015 – REVISED NOVEMBER 2017 Product Folder Links: LM43601-Q1 Submit Documentation Feedback Copyright © 2015–2017, Texas Instruments Incorporated 6.6 Timing Requirements PARAMETER MIN TYP MAX UNIT CURRENT LIMIT AND HICCUP NOC Hiccup wait cycles when LS current limit tripped 32 Cycles TOC Hiccup retry delay time 5.5 ms SOFT START (SS/TRK PIN) TSS Internal soft-start time when SS pin open circuit 3.86 ms POWER GOOD (PGOOD PIN) TPGOOD-RISE Power-good flag rising transition deglitch delay 220 µs TPGOOD-FALL Power-good flag falling transition deglitch delay 220 µs (1) Specified by design 6.7 Switching Characteristics Over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SW (SW PIN) TON-MIN (1) Minimum high side MOSFET ON- time 125 165 ns TOFF-MIN (1) Minimum high side MOSFET OFF- time 200 250 ns OSCILLATOR (SW PINS AND SYNC PIN) FOSC- DEFAULT Oscillator default frequency RT pin open circuit 445 500 570 kHz FADJ Minimum adjustable frequency With 1% resistors at RT pin 200 kHz Maximum adjustable frequency 2200 kHz Frequency adjust accuracy 10% VSYNC-HIGH Sync clock high level threshold 2 V VSYNC-LOW Sync clock low level threshold 0.4 V DSYNC-MAX Sync clock maximum duty cycle 90% DSYNC-MIN Sync clock minimum duty cycle 10% TSYNC-MIN Minimum sync clock ON- and OFF- time 80 ns |
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