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LM5088 Datasheet(PDF) 4 Page - Texas Instruments |
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LM5088 Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 36 page  LM5088, LM5088-Q1 SNVS600H – DECEMBER 2008 – REVISED MARCH 2013 www.ti.com Electrical Characteristics (1) Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C to +125°C. 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. Unless otherwise stated the following conditions apply: VVIN = 48V, VVCC= 8V, VEN = 5V RRT = 31.6 kΩ, No load on HG. Symbol Parameter Conditions Min Typ Max Units VIN SUPPLY IBIAS VIN Operating Current VFB = 1.3V 3.8 5.5 mA ISTANDBY VIN Standby Current VEN = 1V 2.9 3.6 mA ISHUTDOWN VIN Shutdown Current VEN = 0V 15 26 µA VCC REGULATOR VVCC(Reg) VCC Regulation VVCC = open 7.4 7.8 8.2 V VVCC(Reg) VCC Regulation VVIN = 4.5V,VVCC=open 4.3 4.5 V VCC Sourcing Current Limit VVCC = 0 30 35 mA VVCC(UV) VCC Under-Voltage Lockout Threshold Positive going VVCC 3.7 4 4.2 V VCC Under-Voltage Hysteresis 200 mV ENABLE THRESHOLDS EN Shutdown Threshold VEN Rising 320 400 480 mV EN Shutdown Hysteresis VEN Falling 100 mV EN Standby Threshold VEN Rising 1.1 1.2 1.3 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 11 13 µA FB to SS Offset VFB = 1.3V 150 mV ERROR AMPLIFIER VREF FB Reference Voltage Measured at FB Pin 1.187 1.205 1.223 V FB = COMP FB Input Bias Current VFB = 1.2V 18 100 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 185 280 365 ns TON(MIN) Minimum HG On-time VVIN = 60V 55 ns COMP to PWM comparator offset 930 mV OSCILLATOR (RT Pin) LM5088-2 (Non-Dithering) Fnom1 Nominal Oscillator Frequency RRT = 31.6 kΩ 180 200 220 kHz Fnom2 RRT = 11.3 kΩ 430 500 565 kHz LM5088-1 (Dithering) Fmin Dithering Range Minimum Dither Frequency Fnom-5% kHz Fmax Maximum Dither Frequency Fnom+5% kHz SYNC SYNC positive threshold 2.3 V SYNC Pulse Width 15 150 ns (1) Typical specifications represent the most likely parametric norm at 25°C operation. 4 Submit Documentation Feedback Copyright © 2008–2013, Texas Instruments Incorporated Product Folder Links: LM5088 LM5088-Q1 |
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