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LM5019 Datasheet(PDF) 4 Page - Texas Instruments |
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LM5019 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 25 page LM5019 SNVS788E – JANUARY 2012 – REVISED DECEMBER 2013 www.ti.com Electrical Characteristics Specifications with standard typeface are for TJ = 25°C, and those with boldface type apply over full Operating Junction Temperature range. VIN = 48 V, unless otherwise stated (1). Symbol Parameter Conditions Min Typ Max Units VCC Supply VCC Reg VCC Regulator Output VIN = 48 V, ICC = 20 mA 6.25 7.6 8.55 V VCC Current Limit VIN = 48 V (2) 26 mA VCC Undervoltage Lockout Voltage 4.15 4.5 4.9 V (VCC Increasing) VCC Undervoltage Hysteresis 300 mV VCC Drop Out Voltage VIN = 9 V, ICC = 20 mA 2.3 V IIN Operating Current Non-Switching, FB = 3 V 1.75 mA IIN Shutdown Current UVLO = 0 V 50 225 µA Switch Characteristics ITEST = 200 mA, BST-SW = 7 Buck Switch RDS(ON) 0.8 1.8 Ω V Synchronous RDS(ON) ITEST = 200 mA 0.45 1 Ω Gate Drive UVLO VBST − VSW Rising 2.4 3 3.6 V Gate Drive UVLO Hysteresis 260 mV Current Limit Current Limit Threshold 150 240 300 mA Current Limit Response Time Time to Switch Off 150 ns Off-Time Generator (Test 1) FB = 0.1 V, VIN = 48 V 12 µs Off-Time Generator (Test 2) FB = 1 V, VIN = 48 V 2.5 µs On-Time Generator TON Test 1 VIN = 32 V, RON = 100 k 270 350 460 ns TON Test 2 VIN = 48 V, RON = 100 k 188 250 336 ns TON Test 3 VIN = 75 V, RON = 250 k 250 370 500 ns TON Test 4 VIN = 10 V, RON = 250 k 1880 3200 4425 ns Minimum Off-Time Minimum Off-Timer FB = 0 V 144 ns Regulation and Overvoltage Comparators Internal Reference Trip Point FB Regulation Level 1.2 1.225 1.25 V for Switch ON FB Overvoltage Threshold Trip Point for Switch OFF 1.62 V FB Bias Current 60 nA Undervoltage Sensing Function UV Threshold UV Rising 1.19 1.225 1.26 V UV Hysteresis Input Current UV = 2.5 V -10 -20 -29 µA Remote Shutdown Threshold Voltage at UVLO Falling 0.32 0.66 V Remote Shutdown Hysteresis 110 mV Thermal Shutdown Tsd Thermal Shutdown Temp. 165 °C Thermal Shutdown Hysteresis 20 °C Thermal Resistance SO Power PAD-8 40 °C/W θJA Junction to Ambient WSON-8 40 °C/W (1) All limits are verified by design. All electrical characteristics having room temperature limits are tested during production at TA = 25°C. All hot and cold limits are verified by correlating the electrical characteristics to process and temperature variations and applying statistical process control. (2) VCC provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading. 4 Submit Documentation Feedback Copyright © 2012–2013, Texas Instruments Incorporated Product Folder Links: LM5019 |
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