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TPS70348PWP Datasheet(PDF) 7 Page - Texas Instruments |
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TPS70348PWP Datasheet(HTML) 7 Page - Texas Instruments |
7 / 46 page TPS70345, TPS70348 TPS70351, TPS70358 TPS70302 www.ti.com SLVS285H – AUGUST 2000 – REVISED APRIL 2010 ELECTRICAL CHARACTERISTICS (continued) Over recommended operating junction temperature range (TJ = –40°C to +125°C), VIN1 or VIN2 = VOUTX(nom) + 1V, IOUTX = 1mA, EN = 0V, COUT1 = 22mF, and COUT2 = 47mF (unless otherwise noted). PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VOUT1 Terminal VOUT1 UV comparator: positive-going input threshold voltage at VOUT2 UV 80 83 86 %VOUT comparator %VOUT, VOUT1 UV comparator: hysteresis 3 mV VOUT1 UV comparator: falling edge VSENSE1 decreasing below threshold 140 ms deglitch IO = 1 A, VIN1 = 3.2 V TJ = +25°C 160 Dropout voltage(4) mV IO = 1 A, VIN1 = 3.2 V 250 Peak output current 2ms pulse width 1.2 A Discharge transistor current VOUT1 = 1.5 V 7.5 mA VIN1/VIN2 Terminal UVLO threshold 2.3 2.65 V UVLO hysteresis 110 mV FB Terminal Input current: TPS70302 FB = 1.8 V 1 mA (4) Input voltage (VIN1 or VIN2) = VO(typ) – 100mV. For 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 is set to 3.2 V to perform this test. TERMINAL FUNCTIONS TERMINAL I/O DESCRIPTION NAME NO. EN 7 I Active low enable GND 9 — Regulator ground GND/HEATSI 1, 12, 13, 24 — Ground/heatsink NK MR1 6 I Manual reset input 1, active low, pulled up internally MR2 5 I Manual reset input 2, active low, pulled up internally NC 4, 17, 20 — No connection PG1 19 O Open drain output, low when VOUT1 voltage is less than 95% of the nominal regulated voltage RESET 18 O Open drain output, SVS (power-on reset) signal, active low Power-up sequence control: SEQ = High, VOUT2 powers up first; SEQ = Low, VOUT1 powers up SEQ 8 I first. SEQ terminal pulled up internally. VIN1 2, 3 I Input voltage of regulator 1 VIN2 10, 11 I Input voltage of regulator 2 VOUT1 22, 23 O Output voltage of regulator 1 VOUT2 14, 15 O Output voltage of regulator 2 VSENSE2/FB2 16 I Regulator 2 output voltage sense/regulator 2 feedback for adjustable VSENSE1/FB1 21 I Regulator 1 output voltage sense/regulator 1 feedback for adjustable Copyright © 2000–2010, Texas Instruments Incorporated Submit Documentation Feedback 7 |
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