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LM2688 Folha de dados(PDF) 3 Page - National Semiconductor (TI) |
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LM2688 Folha de dados(HTML) 3 Page - National Semiconductor (TI) |
3 / 8 page LM2688-ADJ Electrical Characteristics (Continued) Specifications with standard typeface are for T J = 25˚C, and those with boldface type apply over full Operating Temperature Range. Unless otherwise specified, V IN = 12V, IOUT = 100 mA. Symbol Parameter Conditions LM2688-ADJ Units (Limits) Typ (Note 3) Limit (Note 4) ON/OFF CONTROL I L V LOGIC = 0.5V (Regulator ON) 0.02 µA 5 µA(max) Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is in- tended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: The human body model is a 100 pF capacitor discharged through a 1.5k resistor into each pin. Note 3: Typical numbers are at 25˚C and represent the most likely norm. Note 4: All limits guaranteed at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are 100% pro- duction tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to cal- culate Average Outgoing Quality Level (AOQL). Note 5: External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator sys- tem performance. When the LM2688 is used as shown in the typical application, system performance will be shown in system parameters section Electrical Char- acteristics. Note 6: The switching frequency is reduced when the second stage current limit is activated. The amount of reduction is determined by the severity of current over- load. Note 7: No diode, inductor or capacitor connected to output pin. Note 8: Feedback pin removed from output and connected to 0V to force the output transistor switch ON. Note 9: Feedback pin removed from output and connected to 12V to force the output transistor switch OFF. Note 10: VIN = 40V. Note 11: Junction to ambient thermal resistance with approximately 1 square inch of printed circuit board copper surrounding the leads. Additional copper area will lower thermal resistance further. Typical Performance Characteristics Switch Current Limit DS100050-2 Minimum Operating Supply Voltage DS100050-3 Switching Frequency DS100050-4 Quiescent Current DS100050-5 Standby Quiescent Current DS100050-6 Feedback Pin Bias Current DS100050-7 3 www.national.com |
Nº de peça semelhante - LM2688 |
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Descrição semelhante - LM2688 |
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