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LM2653 Folha de dados(PDF) 4 Page - National Semiconductor (TI) |
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LM2653 Folha de dados(HTML) 4 Page - National Semiconductor (TI) |
4 / 12 page Electrical Characteristics (Continued) Note 2: The maximum allowable power dissipation is calculated by using PDMAX =(TJMAX −TA)/θJA, where TJMAX is the maximum junction temperature, TA is the ambient temperature, and θJA is the junction-to-ambient thermal resistance of the specified package. The 893 mW rating results from using 150˚C, 25˚C, and 140˚C/W for TJMAX,TA, and θJA respectively. A θJA of 140˚C/W represents the worst-case condition of no heat sinking of the 16-pin TSSOP package. Heat sinking allows the safe dissipation of more power. The Absolute Maximum power dissipation must be derated by 7.14 mW per ˚C above 25˚C ambient. The LM2653 actively limits its junction temperatures to about 165˚C. Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 k Ω resistor into each pin. Note 4: Typical numbers are at 25˚C and represent the most likely norm. Note 5: All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are 100% production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). Typical Performance Characteristics Efficiency vs Load Current (V IN = 5V, VOUT = 2.5V) l Q vs VIN 10104922 10104904 I QSD vs Input Voltage I QSD vs Junction Temperature 10104925 10104926 Frequency vs Junction Temperature R SW(ON) vs Input Voltage 10104907 10104923 www.national.com 4 |
Nº de peça semelhante - LM2653_05 |
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Descrição semelhante - LM2653_05 |
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