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TPS2505B1RGWR Datasheet(PDF) 4 Page - Texas Instruments |
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TPS2505B1RGWR Datasheet(HTML) 4 Page - Texas Instruments |
4 / 28 page TPS2505 SPAS093A – DECEMBER 2009 – REVISED FEBRUARY 2010 www.ti.com ELECTRICAL CHARACTERISTICS (BOOST ONLY) (continued) over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Hysteresis 75 mV Maximum duty cycle 85 % Minimum controllable on-time 85 ns PULSE FREQUENCY MODE (PFM) Demanded peak current to enter IINDLOW Peak inductor current, falling 420 mA PFM mode Resume switching due to AUX, 0.98 * AUXLOW AUX too low comparator threshold V falling VAUX POWERSTAGE Switch on resistance (SWN) 120 m Ω Peak switch current limit ISW 3 4.5 6 A (SWN MOSFET) Switch on resistance (SWP) Vsg = VMAX 125 m Ω Switch on resistance (SWP + USB) VIN > VNFM 125 185 m Ω START UP(3) ISTART Constant current 0.1 A Constant current exit threshold VEXIT 700 mV (VIN –VAUX) tstartup Boost startup time VIN = 5.1 V, COUT = 150 µF 25 40 ms BOOST ENABLE (EN) Enable threshold, boost converter 0.7 1 V IEN Input current VEN = 0 V or 5.5 V -0.5 0.5 µA (3) VAUX pin must be unloaded during startup. ELECTRICAL CHARACTERISTICS (USB1/2 ONLY) over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT USB1, USB2 rDS(on) USB switch resistance 80 m Ω VAUX = 5.1 V, CL = 100 µF, tr Rise time, output 2 3 ms RL = 10 Ω VAUX = 5.1 V, CL = 100 µF, tf Fall time, output 2.5 3.5 ms RL = 10 Ω VUSB1/2 USB1/2 output voltage Including ripple 4.75 5.25 mV USB ENABLE (ENUSB1, ENUSB2) Enables threshold, USB switch 0.7 1 V IENUSB Input current VENUSB = 0 V or 5.5 V -0.5 0.5 µA Turnon time CL = 100 µF, RL = 10 Ω 5 ms Turnoff time CL = 100 µF, RL = 10 Ω 10 ms /FAULT1, /FAULT2 Output low voltage I/FAULT = 1 mA 150 mV Off-state current V/FAULT = 5.5 V 1 µA /FAULT assertion or deassertion due tDEG /FAULT deglitch 6 8 10 ms to over-current condition 4 Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated Product Folder Link(s): TPS2505 |
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