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LM5032 Datenblatt(PDF) 5 Page - National Semiconductor (TI) |
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LM5032 Datenblatt(HTML) 5 Page - National Semiconductor (TI) |
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5 / 22 page ![]() Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. VIN to GND -0.3V to 105V VCC to GND -0.3V to 16V RT/SYNC, RES and DCL to GND -0.3V to 5.5V CS Pins to GND -0.3V to 1.25V All other inputs to GND -0.3V to 7V ESD Rating (Note 5) Human Body Model 2kV Storage Temperature Range -55˚C to 150˚C Junction Temperature 150˚C Lead Temperature (Soldering 4 sec), (Note 2) 260˚C Operating Ratings (Note 1) VIN Voltage 13.0V to 100V External Voltage Applied to VCC 8V to 15V Operating Junction Temperature -40˚C to +125˚C Electrical Characteristics Specifications with standard typeface are for T J = 25˚C, and those with boldface type apply over full Operating Junction Temperature range. VIN = 48V, VCC = 10V externally applied, R T =RDCL = 42.2k Ω, UVLO = 1.5V, unless otherwise stated (Note 3) and (Note 4). Symbol Parameter Conditions Min Typ Max Units Startup Regulator (VIN, VCC Pins) V CCReg V CC voltage Ext. supply disconnected. 7.4 7.7 8 V I CC(Lim) V CC current limit VCC = 0V. 19 22 mA V CC UVT V CC Under-voltage threshold (V CC increasing) Ext. supply disconnected, VIN =11V. VCC - 300 mV VCC - 100 mV V V CC decreasing 5.5 6.2 6.9 V I IN Startup regulator current VIN = 90V, UVLO = 0V 500 600 µA I CCIn Supply current into VCC from external source Output loads = open, V CC = 10V 4.3 7 mA UVLO UVLO Under-voltage threshold 1.22 1.25 1.28 V I HYST Hysteresis current 16 20 24 µA Current Sense Input (CS1, CS2 Pins) CS Current Limit Threshold 0.45 0.5 0.55 V CS delay to output CS1 (CS2) taken from zero to 1.0V. Time for OUT1 (OUT2) to fall to 90% of VCC. Output load=0pF. 40 ns Leading edge blanking time at CS1 (CS2) 50 ns CS1 (CS2) sink impedance (clocked) Internal pull-down FET on. 30 55 Ω R CS Equivalent input resistance at CS CS taken from 0.2V to 0.5V, internal FET off. 42 k Ω Current Limit Restart (RES Pin) ResTh Threshold 2.4 2.55 2.7 V Charge source current 15 20 25 µA Discharge sink current 7.5 10 12.5 µA Soft-start (SS1, SS2 Pins) I SS Current source (normal operation) 35 50 65 µA Current source during a current limit restart 0.7 1 1.3 µA V SS Open circuit voltage 5 V www.national.com 5 |
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