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LM22678 数据表(PDF) 4 Page - Texas Instruments |
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LM22678 数据表(HTML) 4 Page - Texas Instruments |
4 / 23 page LM22678 SNVS585K – SEPTEMBER 2008 – REVISED MARCH 2013 www.ti.com Electrical Characteristics (continued) Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C to +125°C. Minimum and Maximum limits are ensured through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TA = TJ = 25°C, and are provided for reference purposes only. Unless otherwise specified: VIN = 12V. Min Typ Max Parameter Test Conditions Units (1) (2) (1) IBIAS Feedback Bias Current VFB = 1.3V (ADJ Version Only) 230 nA VEN Enable Threshold Voltage Falling 1.3 1.6 1.9 V VENHYST Enable Threshold Hysteresis 0.6 V IEN Enable Input Current EN Input = 0V 6 µA TSD Thermal Shutdown Threshold 150 °C θJA Thermal Resistance Junction to ambient thermal 22 °C/W resistance (3) (3) The value of θJA for the PFM package of 22°C/W is valid if package is mounted to 1 square inch of copper. The θJA value can range from 20 to 30°C/W depending on the amount of PCB copper dedicated to heat transfer. See application note AN-1797 SNVA328 for more information. 4 Submit Documentation Feedback Copyright © 2008–2013, Texas Instruments Incorporated Product Folder Links: LM22678 |
类似零件编号 - LM22678 |
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类似说明 - LM22678 |
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