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LM5088MHX-1 Datasheet(PDF) 5 Page - Texas Instruments |
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LM5088MHX-1 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 36 page LM5088, LM5088-Q1 www.ti.com SNVS600H – DECEMBER 2008 – REVISED MARCH 2013 Electrical Characteristics (1) (continued) 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 CURRENT LIMIT VCS(TH) Cycle by cycle sense voltage threshold VRAMP = 0V 112 120 136 mV Cycle by Cycle Current Limit Delay VRAMP = 2.5V 280 ns Buck Switch VDS protection VIN to SW 1.5 V CURRENT LIMIT RESTART (RES Pin) Vresup RES Threshold Upper (rising) VCS = 0.125 1.1 1.2 1.3 V Vresdown RES Threshold Lower (falling) 0.1 0.2 0.3 V Icharge Charge source current VCS >= 0.125 40 50 65 µA Idischarge Discharge sink current VCS < 0.125 20 27 34 µA Irampdown Discharge sink current -(post fault) 0.8 1.2 1.6 µA RAMP GENERATOR(2) IRAMP1 RAMP Current 1 VVIN = 60V, VOUT = 10V 235 295 345 µA IRAMP2 RAMP Current 2 VVIN = 10V, VOUT = 10V 18 25 30 µA VOUT Bias Current VOUT = 48V 250 µA RAMP Output Low Voltage VVIN = 60V, VOUT = 10V 200 mV HIGH SIDE (HG) GATE DRIVER VOLH HG Low-state Output Voltage IHG = 100 mA 115 215 mV VOHH HG High-state Output Voltage IHG = -100 mA, VOHH = VBOOT - VHG 240 mV HG Rise Time Cload = 1000 pF 12 ns HG Fall Time Cload = 1000 pF 6 ns IOHH Peak HG Source Current VHG = 0V 1.5 A IOLH Peak HG Sink Current VHG = VVCC 2 A BOOT UVLO BOOT to SW 3 V Pre RDS(ON) Pre-Charge Switch ON- resistance IVCC = 1 mA 72 Ω Pre-Charge switch ON time 300 ns THERMAL(3) TSD Thermal Shutdown Temperature Junction Temperature Rising 165 °C Thermal Shutdown Hysterisis Junction Temperature Falling 25 °C θJC Thermal Resistance Junction to Case 6 °C /W θJA Thermal Resistance Junction to Ambient 40 °C /W (2) RAMP and COMP are output pins. As such they are not specified to have an external voltage applied. (3) For detailed information on soldering plastic HTSSOP packages visit www.ti.com/packaging. Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM5088 LM5088-Q1 |
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