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TPS65283 Datasheet(PDF) 6 Page - Texas Instruments |
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TPS65283 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 42 page TPS65283, TPS65283-1 SLVSCL3C – JUNE 2014 – REVISED AUGUST 2014 www.ti.com 8.5 Electrical Characteristics TJ = 25°C, VIN1 = VIN2 = 12 V, ƒSW = 500 kHz, RPG1 = RPG2 = RnFAULTx = 100 kΩ, unless otherwise noted PARAMETER TEST CONDITIONS MIN TYP MAX UNIT INPUT SUPPLY VIN Input voltage range 4.5 18 V IDDSDN Shutdown supply current VSW_EN = VEN1 = VEN2 = 0 5.5 10 µA EN1 = EN2 = high, VFB1 = VFB2 = 1 V, IDDQ_NSW None switching quiescent current 0.5 mA With buck1 and buck2 not switching VIN1 rising 4 4.25 4.5 V UVLO Input voltage undervoltage lockout (UVLO) VIN1 falling 3.5 3.75 4 V Hysteresis 500 mV V7V Internal biasing supply VV7V load current = 0 A, VIN1 = 12 V 6.05 6.3 6.49 V IOCP_V7V Current limit of V7V LDO 180 mA OSCILLATOR ƒSW Switching frequency ROSC = 100 k Ω 400 500 600 kHz TSYNC_w Clock sync minimum pulse width 80 ns VSYNC_HI Clock sync high threshold 2 V VSYNC_LO Clock sync low threshold 0.4 V VSYNC_D Clock falling edge to LX rising edge delay 120 ns FSYNC Clock sync frequency range 200 2000 kHz BUCK1/BUCK2 CONVERTER VCOMP1 = VCOMP2 = 1.2 V, TJ = 25°C 0.594 0.6 0.606 V VFB Feedback voltage VCOMP1 = VCOMP2 = 1.2 V, TJ = –40°C to 125°C 0.588 0.6 0.612 V Gm_EA Error amplifier transconductance –2 µA < ICOMPX < 2 µA 300 µS COMP1/COMP2 voltage to inductor current Gm_SRC ILX1 = ILX2 = 0.5 A 7.4 A/V Gm(1) VENXH EN1, EN2 high level input voltage 1.2 1.26 V VENXL EN1, EN2 low-level input voltage 1.1 1.15 V IENX EN1, EN2 pullup current VEN1 = VEN2 = 1 V 3.6 µA IENX EN1, EN2 pullup current VEN1 = VEN2 = 1.5 V 6.6 µA IENhys IEN1 / IEN2 hysteresis current 3 µA TJ = 25°C 80 100 TON_MIN Minimum on time ns TJ = –40°C to 125°C 120 TSS_INT Internal soft-start time 2.4 ms ILIMIT1 Buck1 peak inductor current limit 4.25 5 5.75 A ILIMITS1 Buck1 low-side sink current limit 1.7 A ILIMIT2 Buck2 peak inductor current limit 3.2 3.75 4.3 A ILIMITS2 Buck2 low side sink current limit 1.3 A Rdson1_HS High-side FET on-resistance in Buck1 V7V = 6.25 V 100 m Ω Rdson1_LS Low-side FET on-resistance in buck1 V7V = 6.25 V 65 m Ω Rdson2_HS High-side FET on-resistance in Buck2 V7V = 6.25 V 140 m Ω Rdson2_LS Low-side FET on-resistance in buck2 V7V = 6.25 V 95 m Ω THICCUP_WAIT Hiccup wait time 4 ms THICCUP_RE Hiccup time before restart 64 ms POWER GOOD VFB1 / VFB2 UV falling 92.5% VFB1 / VFB2 UV rising 95% Vth_PG Feedback voltage threshold VFB1 / VFB2 OV rising 107.5% VFB1 / VFB2 OV falling 105% TDEGLITCH(PGF) PG1/PG2 deglitch time (falling edge) 1 ms TDEGLITCH(PGR) PG1/PG2 deglitch time (rising edge) 2 ms IPG Power Good pin leakage VFB1 = VFB2 = 0.6 V 1 µA VLOW_PG PG1/PG2 pin low voltage Force FB1 = FB2 = 0.5 V, sink 1 mA to PG1/PG2 pin 0.4 V (1) Specified by design. 6 Submit Documentation Feedback Copyright © 2014, Texas Instruments Incorporated |
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