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LM25088 Folha de dados(PDF) 7 Page - Texas Instruments |
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LM25088 Folha de dados(HTML) 7 Page - Texas Instruments |
7 / 39 page LM25088, LM25088-Q1 www.ti.com SNVS609J – DECEMBER 2008 – REVISED JANUARY 2015 Electrical Characteristics (1)(2) (continued) TJ = -40°C to +125°C TJ = 25°C PARAMETER TEST CONDITIONS UNIT MIN TYP MAX MIN TYP(3) MAX SYNC SYNC positive threshold 2.3 V SYNC Pulse Width 15 150 ns CURRENT LIMIT Cycle by cycle sense voltage VRAMP = 0V mV VCS(TH) 112 136 120 threshold Cycle by Cycle Current Limit VRAMP = 2.5V ns 280 Delay 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 1.3 1.2 V Vresdown RES Threshold Lower (falling) 0.1 0.3 0.2 V Icharge Charge source current VCS >= 0.125 40 65 50 µA Idischarge Discharge sink current VCS < 0.125 20 34 27 µA Discharge sink current -(post µA Irampdown 0.8 1.6 1.2 fault) RAMP GENERATOR IRAMP1 RAMP Current 1(4) VVIN = 36V, VOUT = 10V 135 195 165 µA IRAMP2 RAMP Current 2(4) VVIN = 10V, VOUT = 10V 18 30 25 µA VOUT Bias Current VOUT = 24V 125 µA RAMP Output Low Voltage(4) VVIN = 36V, VOUT = 10V 200 mV HIGH SIDE (HG) GATE DRIVER VOLH HG Low-state Output Voltage IHG = 100 mA 215 115 mV HG High-state Output Voltage IHG = -100 mA, VOHH = VBOOT mV VOHH 240 - VHG 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 Pre-Charge Switch ON- IVCC = 1 mA Ω 72 RDS(ON) resistance Pre-Charge switch ON time 300 ns THERMAL Thermal Shutdown Junction Temperature Rising °C TSD 165 Temperature Thermal Shutdown Hysterisis Junction Temperature Falling 25 °C (4) RAMP and COMP are output pins. As such they are not specified to have an external voltage applied. Copyright © 2008–2015, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LM25088 LM25088-Q1 |
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