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TPS2491 Datasheet(PDF) 4 Page - Texas Instruments |
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TPS2491 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 22 page www.ti.com TPS2490 TPS2491 SLVS503 – NOVEMBER 2003 ELECTRICAL CHARACTERISTICS (continued) unless otherwise noted, minimum and maximum limits apply across the recommended operating junction temperature and voltage range, V TIMER = 0 V, and all outputs unloaded; typical specifications are at TJ = 25°C, VVCC = 48 V, VTIMER = 0 V, and all outputs unloaded; positive currents are into pins. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT PG threshold voltage, VOUT falling, PG goes VPGTH VSENSE = VVCC, measure V(VCC-OUT) 2.2 2.7 3.2 V low ∆V PGT PG threshold hysteresis voltage, V(SENSE-OUT) VSENSE = VVCC 1.4 V PG deglitch delay, detection to output, rising tDPG VSENSE = VVCC 5 9 15 ms and falling edges (2) Leakage current, PG false, open drain 10 µA OUTPUT VOLTAGE FEEDBACK INPUT (OUT) VOUT = VVCC, VEN = Hi, sinking 8 20 µA IOUT Bias current VOUT = GND, VEN = Lo, sourcing 18 40 µA ENABLE INPUT (EN) VEN_H Threshold, VEN going high 1.32 1.35 1.38 V VEN_L Threshold, VEN going low 1.22 1.25 1.28 V VEN hysteresis (2) 100 mV Leakage current VEN = 48 V 1 µA INPUT SUPPLY UVLO (VCC) VVCC turn on Rising 8.4 8.8 V VVCC turn off Falling 7.5 8.3 V Hysteresis(2) 75 mV (2) Not tested in production. 4 |
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