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LM2724ALD 数据表(PDF) 5 Page - National Semiconductor (TI) |
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LM2724ALD 数据表(HTML) 5 Page - National Semiconductor (TI) |
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5 / 8 page  Electrical Characteristics LM2724A (Continued) V CC = BOOT = SYNC = 5V, SW = GND = 0V, unless otherwise specified. Typicals and limits appearing in plain type apply for T A =TJ = +25˚C. Limits appearing in boldface type apply over the entire operating temperature range. Symbol Parameter Condition Min Typ Max Units I leak_IN IN Pin Leakage Current IN = 0V, Source Current 2 µA IN = 5V, Sink Current 10 t on_min1 Minimum Positive Pulse Width at IN Pin (Note 5) 160 ns t on_min2 Minimum Positive Pulse Width at IN Pin for HG to Respond (Note 6) 45 t on_min3 Minimum Positive Pulse Width at IN Pin for LG to Respond (Note 7) 10 t off_min1 Minimum Negative Pulse Width at IN Pin for LG to Respond (Note 8) 40 t off_min2 Minimum Negative Pulse Width at IN Pin for HG to Respond (Note 9) 5 V IH_IN IN High Level Input Voltage When IN pin goes high from 0V 55% V CC V IL_IN IN Low Level Input Voltage When IN pin goes low from 5V 25% Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating ratings are conditions under which the device operates correctly. The gaurnteed specifications apply only for the listed test conditions. Some performance characteristics may degrade when the part is not operated under listed conditions. Note 2: If BOOT voltage exceeds this value, the ESD structure will degrade. Note 3: Maximum allowable power dissipation is a function of the maximum junction temperature, TJMAX, the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: PMAX =(TJMAX-TA)/ θJA. The junction-to- ambient thermal resistance, θJA, for LM2724A is 172˚C/W. For a TJMAX of 150˚C and TA of 25˚C, the maximum allowable power dissipation is 0.7W. The θJA, for LM2724A LLP package is 39˚C/W. For a TJMAX of 150˚C and TA of 25˚C, the maximum allowable power dissipation is 3.2W. Note 4: ESD machine model susceptibility is 200V. Note 5: If the positive pulse width at IN pin is below this value but above ton_min2, the pulse is internally stretched to ton_min1, so the HG width will be a constant value. Note 6: If the positive pulse width at IN pin is below this value but above ton_min3, then HG stops responding while LG still responds to the pulse. Note 7: If the positive pulse width at IN pin is below this value, the pulse will be completely ignored. Neither HG or LG will respond to it. Note 8: If the negative pulse width at IN pin is below this value but above toff_min2, then LG stops responding while HG still responds. Note 9: If the negative pulse width at IN pin is below this value, the pulse will be completely ignored. Neither HG or LG will respond to it. www.national.com 5 |
类似零件编号 - LM2724ALD |
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类似说明 - LM2724ALD |
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