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TPS2505 Fiches technique(PDF) 3 Page - Texas Instruments |
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TPS2505 Fiches technique(HTML) 3 Page - Texas Instruments |
3 / 28 page TPS2505 www.ti.com SPAS093A – DECEMBER 2009 – REVISED FEBRUARY 2010 ELECTRICAL CHARACTERISTICS (SHARED BOOST, LDO AND USB) over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT BIAS VIN 15 25 VIN = 3.3 V, VAUX = 5.2 V, VEN = VIN, Bias Current µA VENUSB1 = VAUX, IAUX = IUSB = 0 A VAUX 500 600 VIN = 3.3 V, VEN = VENUSB = 0 V, Shutdown current VIN AUX and USB OPEN, 5 µA -40°C ≤ TJ ≤ 85°C UVLO VIN rising 2.08 2.20 Threshold 1.69 1.85 VIN falling, Undervoltage lockout threshold on IN for boost VAUX = 5.2 V Hysteresis 0.4 V converter Threshold 1.93 2.05 VIN falling, VAUX = OPEN Hysteresis 0.15 VAUX rising 4.18 4.45 Undervoltage lockout threshold on AUX for USB Threshold 4.1 4.37 V switches VAUX falling Hysteresis 0.09 THERMAL SHUTDOWN Full thermal shutdown thereshold 150 °C Hysteresis 10 °C USB only thermal shutdown 130 °C Hysteresis 10 °C ELECTRICAL CHARACTERISTICS (BOOST ONLY) over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT APPLICATION SPECIFICATIONS Includes ripple and line/load VAUX AUX regulation voltage 4.75 5.1 5.25 V regulation PFM, IO = 100 mA 250 VRIPPLE AUX ripple voltage mV PWM, IO = 1100 mA 75 IO = 0 mA to 1100 mA (PWM Load regulation(1) 50 mV operation only) IO = 1100 mA (PWM operation) 50 Line regulation mV IO = 1100 mA, VIN = 3.6 V to 5.25 V 300(2) VREF Internal reference voltage 1.35 V OSCILLATOR freq Switching frequency, normal mode VIN < VLFM 850 1000 1150 kHz Switching frequency, low-frequency VIN > VLFM 225 250 275 kHz mode Low-frequency mode input voltage VLFM 4.25 4.35 4.45 V threshold Hysteresis 200 mV No-frequency mode input voltage VNFM threshold VIN rising 4.9 5.05 5.17 V (Boost SYNC MOSFET always on) (1) Load regulation in No Frequency or Pass-Through is given by IR drop across SWP switch resistance.. (2) Includes voltage drop when transitioning to No Frequency or Pass-Through Mode, where VAUX is no longer a closed loop regulated voltage and drops to VNFM – ILOADRSWP. For No Frequency or Pass-Through, ΔVAUX/ ΔVIN = 1. Copyright © 2009–2010, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Link(s): TPS2505 |
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