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LM25088-Q1 Scheda tecnica(PDF) 6 Page - Texas Instruments |
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LM25088-Q1 Scheda tecnica(HTML) 6 Page - Texas Instruments |
6 / 39 page LM25088, LM25088-Q1 SNVS609J – DECEMBER 2008 – REVISED JANUARY 2015 www.ti.com 7.5 Electrical Characteristics (1) (2) TJ = -40°C to +125°C TJ = 25°C PARAMETER TEST CONDITIONS UNIT MIN TYP MAX MIN TYP(3) MAX VIN SUPPLY IBIAS VIN Operating Current VFB = 1.3V 4.5 3.2 mA ISTANDBY VIN Standby Current VEN = 1V 3.0 2.5 mA ISHUTDOWN VIN Shutdown Current VEN = 0V 24 14 µA VCC REGULATOR VVCC(Reg) VCC Regulation VVCC = open 7.4 8.2 7.8 V VVCC(Reg) VCC Regulation VVIN = 4.5V,VVCC=open 4.3 4.5 V VCC Sourcing Current Limit VVCC = 0 25 30 mA VCC Under-Voltage Lockout Positive going VVCC V VVCC(UV) 3.7 4.2 4 Threshold VCC Under-Voltage Hysteresis 200 mV ENABLE THRESHOLDS EN Shutdown Threshold VEN Rising 320 480 400 mV EN Shutdown Hysteresis VEN Falling 100 mV EN Standby Threshold VEN Rising 1.1 1.3 1.2 V EN Standby Hysteresis VEN Falling 120 mV EN Pull-up Current Source VEN = 0V 5 µA SOFT- START SS Pull-up Current Source VSS = 0V 8 13 11 µA FB to SS Offset VFB = 1.3V 150 mV ERROR AMPLIFIER FB Reference Voltage Measured at FB Pin V VREF 1.187 1.223 1.205 FB = COMP FB Input Bias Current VFB = 1.2V 100 18 nA COMP Sink/Source Current 3 mA AOL DC Gain 60 dB FBW Unity gain bandwidth 3 MHz PWM COMPARATORS THG(OFF) Forced HG Off-time 185 365 280 ns TON(MIN) Minimum HG On-time VVIN = 36V 55 ns COMP to PWM comparator mV 930 offset OSCILLATOR (RT Pin) LM25088-2 (Non-Dithering) Fnom1 Nominal Oscillator Frequency RRT =31.6 kΩ 180 220 200 kHz Fnom2 RRT = 11.3 kΩ 430 565 500 kHz LM25088-1 (Dithering) Dithering Range Minimum Dither Frequency Fnom- kHz Fmin 5% Maximum Dither Frequency Fnom+ kHz Fmax 5% (1) Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical values represent at TJ = 25°C, and are provided for reference purposes only. (2) Unless otherwise stated the following conditions apply: VVIN = 24V, VVCC= 8V, VEN = 5V RRT = 31.6 kΩ. No load on HG. (3) Typical specifications represent the most likely parametric norm at 25°C operation. 6 Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: LM25088 LM25088-Q1 |
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