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TPS43350-Q1 Datasheet(PDF) 4 Page - Texas Instruments |
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TPS43350-Q1 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 31 page TPS43350-Q1 TPS43351-Q1 SLVSAR7B – JUNE 2011 – REVISED MAY 2012 www.ti.com DC ELECTRICAL CHARACTERISTICS VIN = 8 V to 18 V, TJ = –40°C to 150°C (unless otherwise noted) NO. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 1.0 Input Supply 1.1 VBat Supply voltage After initial start-up, condition is satisfied. 4 40 V Device operating range Input voltage required for device on initial start-up 6.5 40 V 1.2 VIN Buck regulator operating range after initial start-up 4 40 V VIN falling 3.5 3.6 3.8 V 1.3 VIN UV Buck undervoltage lockout VIN rising 3.8 4 V VIN = 13 V, BuckA: LPM, BuckB: off 30 40 µA LPM quiescent current: 1.5 Iq_LPM_ VIN = 13 V, BuckB: LPM, BuckA: off TA = 25°C (1) VIN = 13 V, BuckA, B: LPM 35 45 µA VIN = 13 V, BuckA: LPM, BuckB: off 40 50 µA LPM quiescent current: 1.6 Iq_LPM VIN = 13 V, BuckB: LPM, BuckA: off TA = 125°C (1) VIN = 13 V, BuckA, B: LPM 45 55 µA Normal operation, SYNC = 5 V VIN = 13 V, BuckA: CCM, BuckB: off Quiescent current: 1.7 Iq_NRM 4.85 5.3 mA TA = 25°C (1) VIN = 13 V, BuckB: CCM, BuckA: off VIN = 13 V, BuckA, B: CCM 7 7.6 mA Normal operation, SYNC = 5V VIN = 13 V, BuckA: CCM, BuckB: off Quiescent current: 1.8 Iq_NRM 5 5.5 mA TA = 125°C (1) VIN = 13 V, BuckB: CCM, BuckA: off VIN = 13 V, BuckA, B: CCM 7.5 8 mA 1.9 Ibat_sh Shutdown current BuckA, B: off, VBat = 13 V 2.5 4 µA 2.0 Input Voltage VIN - Overvoltage Lockout VIN rising 45 46 47 V 2.1 VOVLO Overvoltage shutdown VIN falling 43 44 45 V 2.2 OVLOHys Hysteresis 1 2 3 V 2.3 OVLOfilter Filter time 5 µs Gate Driver for PMOS 3.1 rDS(on) PMOS OFF 10 20 Ω 3.2 IPMOS_ON Gate current VIN = 13.5 V, Vgs = –5 V 10 mA 3.3 tdelay_ON Turnon delay C = 10 nF 5 10 µs 4.0 Buck Controllers 4.1 VBuckA/B Adjustable output voltage range 0.9 11 V Measure FBX pin 0.792 0.800 0.808 V Internal reference voltage in 4.2 Vref, NRM normal mode Internal tolerance on reference –1% 1% Measure FBX pin 0.784 0.800 0.816 V Internal reference voltage in low 4.3 Vref, LPM power mode Internal tolerance on reference –2% 2% V sense for forward current limit in Maximum sense voltage FBx = 0.75 V 4.4 60 75 90 mV CCM (low duty cycles) Vsense V sense for reverse current limit in 4.5 Minimum sense voltage FBx = 1 V –65 –37.5 –23 mV CCM 4.6 VI-Foldback V sense for output short Sense voltage in foldback FBx = 0 V 17 32.5 48 mV 4.7 tdead Shoot-through delay, blanking time 100 ns High-side minimum on-time 100 ns 4.8 DCNRM Duty cycle Maximum duty cycle (digitally controlled) 98.75% 4.9 DCLPM Duty cycle LPM 80% (1) Quiescent current specification is non-switching current consumption without including the current in the external feedback resistor divider. 4 Submit Documentation Feedback Copyright © 2011–2012, Texas Instruments Incorporated Product Folder Link(s): TPS43350-Q1 TPS43351-Q1 |
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