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LM5026 Datasheet(PDF) 6 Page - Texas Instruments |
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LM5026 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 31 page LM5026 SNVS363C – AUGUST 2005 – REVISED MARCH 2010 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 = 48V, VCC = 10V, RT = 30.0kΩ, RSET = 34.8kΩ) unless otherwise stated (1) Symbol Parameter Conditions Min Typ Max Units Startup Regulator VCC Reg VCC Regulation No Load 7.3 7.6 7.9 V VCC Current Limit (2) 20 25 mA I-VIN Startup Regulator VIN = 100V 165 500 µA Leakage (external Vcc Supply) Shutdown Current (Iin) UVLO = 0V 350 450 µA VCC Supply VCC Under-voltage VCC Reg - VCC Reg - V Lockout Voltage 220mV 120mV (positive going Vcc) VCC Under-voltage 1.0 1.5 2.0 V Hysteresis VCC Supply Current Cgate = 0, UVLO = 1.3V 4.2 mA (ICC) 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 10 20 mA UVLO Shutdown/Standby Undervoltage Shutdown 0.3 0.4 0.5 V Threshold Undervoltage Shutdown 0.1 V Hysteresis Undervoltage Standby 1.21 1.25 1.29 V Threshold Undervoltage Standby 16 20 24 µA Hysteresis Current Source Current Limit Cycle by Cycle 0.45 0.5 0.55 V Threshold Voltage ILIM Delay to Output CS step from 0 to 0.6V Time to 40 ns onset of OUT transition (90%) Cgate=0 Leading Edge Blanking 70 100 130 ns Time CS Sink Impedance ICS = 10mA 30 65 Ω (clocked) Over Current Restart Restart Threshold 2.4 2.55 2.7 V Fault Charging Current 7.5 10 12.5 µA Discharging Current 7.5 10 12.5 µA Soft-Start (1) Min and Max limits are 100% production tested at 25 ºC. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate National’s Average Outgoing Quality Level (AOQL). (2) Device thermal limitations may limit usable range. 6 Submit Documentation Feedback Copyright © 2005–2010, Texas Instruments Incorporated Product Folder Links: LM5026 |
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