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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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LM25117 Fiches technique(PDF) 5 Page - Texas Instruments |
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LM25117 Fiches technique(HTML) 5 Page - Texas Instruments |
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5 / 43 page  LM25117 LM25117-Q1 www.ti.com SNVS714D – APRIL 2011 – REVISED APRIL 2012 Electrical Characteristics Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature range of -40°C to +125°C. Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise specified, the following conditions apply: VVIN = 24V, VVCCDIS = 0V, RT = 25kΩ, no load on LO & HO. Symbol Parameter Test Conditions Min Typ Max Unit VIN Supply IBIAS VIN Operating Current (1) VSS = 0V 4.8 6.2 mA VSS = 0V, VVCCDIS = 2V 0.4 0.55 mA ISHUTDOWN VIN Shutdown Current VSS = 0V, VUVLO = 0V 16 40 µA VCC Regulator VCC(REG) VCC Regulation No Load 6.85 7.6 8.2 V VCC Dropout (VIN to VCC) VVIN = 4.5V, No external load 0.05 0.14 V VVIN = 5.0V, ICC = 20mA 0.4 0.5 V VCC Sourcing Current Limit VVCC = 0V 30 42 mA IVCC VCC Operating Current (1) VSS = 0V, VVCCDIS = 2V 4.0 5.0 mA VSS = 0V, VVCCDIS = 2V, VVCC = 14V 5.8 7.3 mA VCC Under-voltage Threshold VCC Rising 3.75 4.0 4.15 V VCC Under-voltage Hysteresis 0.2 V VCC Disable VCCDIS Threshold VCCDIS Rising 1.22 1.25 1.29 V VCCDIS Hysteresis 0.06 V VCCDIS Input Current VVCCDIS = 0V -20 nA VCCDIS Pull-down Resistance 500 k Ω UVLO UVLO Threshold UVLO Rising 1.22 1.25 1.29 V UVLO Hysteresis Current VUVLO = 1.4V 15 20 25 µA UVLO Shutdown Threshold UVLO Falling 0.23 0.3 V UVLO Shutdown Hysteresis 0.1 V Soft Start ISS SS Current Source VSS = 0V 7 10 12 µA SS Pull-down Resistance 13 24 Ω Error Amplifier VREF FB Reference Voltage Measured at FB, FB = COMP 788 800 812 mV FB Input Bias Current VFB = 0.8V 1 nA VOH COMP Output High Voltage ISOURCE = 3mA 2.8 V VOL COMP Output Low Voltage ISINK = 3mA 0.26 V AOL DC Gain 80 dB fBW Unity Gain Bandwidth 3 MHz PWM Comparator tHO(OFF) Forced HO Off-time 260 320 440 ns tON(MIN) Minimum HO On-time VVIN = 42V 100 ns COMP to PWM comparator offset 1.2 V Oscillator fSW1 Frequency 1 RT = 25kΩ 180 200 220 kHz fSW2 Frequency 2 RT = 10kΩ 430 480 530 kHz RT Output Voltage 1.25 V RT Sync Positive Threshold 2.6 3.2 3.95 V Sync Pulse Width 100 ns (1) Operating current does not include the current into the RT resistor. Copyright © 2011–2012, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM25117 LM25117-Q1 |
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