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LM25005 Datasheet(PDF) 6 Page - National Semiconductor (TI) |
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LM25005 Datasheet(HTML) 6 Page - National Semiconductor (TI) |
6 / 21 page Electrical Characteristics Specifications with standard typeface are for T J = 25˚C, and those with boldface type apply over full Operating Junction Temperature range.V IN = 24V, RT = 32.4k Ω unless otherwise stated. (Note 3) (Continued) Symbol Parameter Conditions Min Typ Max Units RAMP GENERATOR Ramp Current 1 Vin = 36V, Vout=10V 136 160 184 µA Ramp Current 2 Vin = 10V, Vout=10V 18 25 32 µA PWM COMPARATOR Forced Off-time 500 ns Min On-time 80 ns COMP to PWM Comparator Offset 0.7 V ERROR AMPLIFIER Feedback Voltage Vfb = COMP 1.207 1.225 1.243 V FB Bias Current 10 nA DC Gain 70 dB COMP Sink / Source Current 3 mA Unity Gain Bandwidth 3 MHz THERMAL SHUTDOWN Tsd Thermal Shutdown Threshold 165 ˚C Thermal Shutdown Hysteresis 25 ˚C THERMAL RESISTANCE θ JC Junction to Case 4 ˚C/W θ JA Junction to Ambient 40 ˚C/W Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: The human body model is a 100pF capacitor discharged through a 1.5k Ω resistor into each pin. Note 3: Min and Max limits are 100% production tested at 25˚C. 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). www.national.com 6 |
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