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LM5041MTC Datasheet(PDF) 6 Page - Texas Instruments |
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LM5041MTC Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 22 page  LM5041 SNVS248D – AUGUST 2003 – REVISED MARCH 2013 www.ti.com Electrical Characteristics (continued) Specifications with standard typeface are for TJ = 25°C, and those with boldface type apply over full Operating Junction Temperature range. VIN = 48V, VCC = 10V, RT = 26.7kΩ, RSET = 20kΩ) unless otherwise stated. (1) Symbol Parameter Conditions Min Typ Max Units Reference Supply VREF Ref Voltage IREF = 0 mA 4.85 5 5.15 V Ref Voltage Regulation IREF = 0 to 10mA 25 50 mV Ref Current Limit 15 20 mA Current Limit ILIM Delay to Output CS Step from 0 to 0.6V 40 ns Time to Onset of OUT Transition (90%) CL = 0 Cycle by Cycle Threshold 0.45 0.5 0.55 V Voltage Cycle Skip Threshold Resets SS capacitor; auto 0.55 0.6 0.65 V Voltage restart Leading Edge Blanking 50 ns Time CS Sink Current (clocked) CS = 0.3V 2 5 mA Soft-Start Soft-start Current Source 7 10 13 µA Soft-start to COMP Offset 0.35 0.55 0.75 V Shutdown Threshold 0.25 0.5 0.75 V Oscillator Frequency1 (RT = TJ = 25°C 180 200 220 kHz 26.7K Ω) 175 225 Frequency2 (RT = 515 600 685 kHz 7.87K Ω) Sync threshold 3 3.5 V PWM Comparator Delay to Output COMP set to 2V 25 ns CS stepped 0 to 0.4V, Time to onset of OUT transition low Max Duty Cycle TS = Oscillator Period (Ts-240ns)/Ts) % Min Duty Cycle COMP = 0V 0 % COMP to PWM 0.32 Comparator Gain COMP Open Circuit FB = 0V 4.1 4.8 5.5 V Voltage COMP Short Circuit FB = 0V, COMP = 0V 0.6 1 1.4 mA Current Slope Compensation Slope Comp Amplitude Delta increase at PWM 110 mV Comparator to CS UVLO Shutdown Under-voltage Shutdown 2.44 2.5 2.56 V Under-voltage Shutdown 16 20 24 µA Hysteresis Current Source Buck Stage Outputs Output High level 5 (VREF) V Output High Saturation IOUT = 10mA 0.5 1 V REF = VOUT 6 Submit Documentation Feedback Copyright © 2003–2013, Texas Instruments Incorporated Product Folder Links: LM5041 |
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