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TPS2505B1RGWR Fiches technique(PDF) 6 Page - Texas Instruments |
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TPS2505B1RGWR Fiches technique(HTML) 6 Page - Texas Instruments |
6 / 33 page TPS2505 SPAS093C – DECEMBER 2009 – REVISED SEPTEMBER 2015 www.ti.com Electrical Characteristics (Boost Only) (continued) over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT No-frequency mode input voltage VNFM threshold VIN rising 4.9 5.05 5.17 V (Boost SYNC MOSFET always on) 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 start-up. 6.7 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 Including ripple VUSB1/2 USB1/2 output voltage 4.75 5.25 mV CL = 100 µF 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 6 Submit Documentation Feedback Copyright © 2009–2015, Texas Instruments Incorporated Product Folder Links: TPS2505 |
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