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TPS70748 Fiches technique(PDF) 8 Page - Texas Instruments |
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TPS70748 Fiches technique(HTML) 8 Page - Texas Instruments |
8 / 34 page TPS70745, TPS70748, TPS70751, TPS70758, TPS70702 DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS WITH POWER UP SEQUENCING FOR SPLIT VOLTAGE DSP SYSTEMS SLVS291 – MAY 2000 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating junction temperature (TJ = –40°C to 125°C) VIN1 or VIN2 = VO(nom) + 1 V, IO = 1 mA, EN = 0, CO = 33 µF(unless otherwise noted) (continued) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Minimum input voltage for valid RESET I(RESET) = 300 µA, V(RESET) ≤ 0.8 V 1.0 1.3 V Trip threshold voltage VO decreasing 92% 95% 98% VO Hysteresis voltage Measured at VO 0.5% VO RESET t(RESET) RESET pulse duration 80 120 160 ms tr(RESET) Rising edge deglitch 30 µs Output low voltage VI = 3.5 V, I(RESET) = 1 mA 0.15 0.4 V Leakage current V(RESET) = 6 V 1 µA Minimum input voltage for valid PG1 IO(PG1) = 300 µA, V(PG1) ≤ 0.8 V 1.0 1.3 V Trip threshold voltage VO decreasing 92% 95% 98% VO PG1 Hysteresis voltage Measured at VO 0.5% VO PG1 tf(PG1) Falling edge deglitch 30 µs Output low voltage VI = 2.7 V, I(PG1) = 1 mA 0.15 0.4 V Leakage current V(PG1) = 6 V 1 µA High level EN input voltage 2 V EN Low level EN input voltage 0.7 V Input current (EN) –1 1 µA High level SEQ input voltage 2 V SEQ Low level SEQ input voltage 0.7 V SEQ pull up current source 6 µA High level input voltage 2 V MR1 / MR2 Low level input voltage 0.7 V Pull up current source 6 µA V VOUT2 UV comparator – positive-going input threshold voltage of VOUT1 UV comparator 80% VO 83% VO 86% VO V V VOUT2 UV comparator – hysteresis 0.5% VO mV VOUT2 VOUT2 UV comparator – falling edge deglitch VSENSE_2 decreasing below threshold 140 µs Peak output current 2 ms pulse width 375 mA Discharge transistor current VOUT2 = 1.5 V 7.5 mA V VOUT1 UV comparator – positive-going input threshold voltage of VOUT1 UV comparator 80% VO 83% VO 86% VO V V VOUT1 UV comparator – hysteresis 0.5% VO mV V VOUT1 UV comparator – falling edge deglitch VSENSE_1 decreasing below threshold 140 µs VOUT1 Dropout voltage (see Note 4) IO = 250 mA, VIN1 = 3.2 V, TJ = 25°C 83 mV g( ) IO = 250 mA, VIN1 = 3.2 V 140 Peak output current 2 ms pulse width 750 mA Discharge transistor current VOUT1 = 1.5 V 7.5 mA VOUT1 UVLO UVLO threshold 2.4 2.65 V FB Input current – TPS70702 FB = 1.8 V 1 µA NOTE 4: Input voltage(VIN1 or VIN2) = VO(Typ) – 100 mV. For the 1.5 V, 1.8 V and 2.5 V regulators, the dropout voltage is limited by input voltage range. The 3.3 V regulator input voltage is to 3.2 V to perform this test. |
Numéro de pièce similaire - TPS70748 |
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Description similaire - TPS70748 |
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