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LM25007 Scheda tecnica(PDF) 5 Page - National Semiconductor (TI) |
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LM25007 Scheda tecnica(HTML) 5 Page - National Semiconductor (TI) |
5 / 12 page Electrical Characteristics (Continued) Specifications with standard type are for T J = 25˚C only; limits in boldface type apply over the full Operating Junction Tempera- ture (T J) range. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values rep- resent the most likely parametric norm at T J = 25˚C, and are provided for reference purposes only. Unless otherwise stated the following conditions apply: V IN = 24V, RON = 200k Ω. (Note 3). Symbol Parameter Conditions Min Typ Max Units Minimum Off Time Minimum Off Timer FB = 0V 300 ns Regulation and OV Comparators FB Reference Threshold Internal reference Trip point for switch ON 2.445 2.5 2.550 V FB Over-Voltage Threshold Trip point for switch OFF 2.875 V FB Bias Current 100 nA Thermal Shutdown Tsd Thermal Shutdown Temp. 165 ˚C Thermal Shutdown Hysteresis 25 ˚C Thermal Resistance θ JA Junction to Ambient MUA Package 200 ˚C/W SDC Package 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: For detailed information on soldering plastic MSOP and LLP packages, refer to the Packaging Data Book available from National Semiconductor Corporation. Note 3: All limits are guaranteed. All electrical characteristics having room temperature limits are tested during production with TA =TJ = 25˚C. All hot and cold limits are guaranteed by correlating the electrical characteristics to process and temperature variations and applying statistical process control. Note 4: The VCC output is intended as a self bias for the internal gate drive power and control circuits. Device thermal limitations limit external loading. Note 5: The human body model is a 100pF capacitor discharge through a 1.5k Ω resistor into each pin. The human body ESD compliance level for Pin 7 and 8 is 1000V. Note 6: For devices procurred in the LLP-8 package the Rds(on) limits are guaranteed by design characterization data only. www.national.com 5 |
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