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LM3485MM Datasheet(PDF) 4 Page - National Semiconductor (TI) |
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LM3485MM Datasheet(HTML) 4 Page - National Semiconductor (TI) |
4 / 15 page Electrical Characteristics (Continued) Specifications in Standard type face are for T J = 25˚C, and in bold type face apply over the full Operating Temperature Range (T J = −40˚C to +125˚C). Unless otherwise specified, VIN = 12V, VISNS =VIN − 1V, and VADJ =VIN − 1.1V. Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. Symbol Parameter Conditions Min (Note 4) Typ (Note 5) Max (Note 4) Unit T ONMIN_CL Minimum on time in current limit V ISNS =VADJ+0.1V V FB = 1.0V Cload on OUT = 1000pF (Note 9) 175 ns %V FB/∆VIN Feedback Voltage Line Regulation 4.5 ≤ V IN ≤ 35V 0.010 %/V Note 1: Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the device is intended to be functional, but device parameter specifications may not be guaranteed. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: The maximum allowable power dissipation is a function of the maximum junction temperature, TJ_MAX, the junction-to-ambient thermal resistance, θJA = 240˚C/W, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: PD_MAX =(TJ_MAX -TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature. Note 3: The human body model is a 100 pF capacitor discharged through a 1.5k Ω resistor into each pin. Note 4: All limits are guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100% 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). Note 5: Typical numbers are at 25˚C and represent the most likely norm. Note 6: The VFB is the trip voltage at the FB pin when PGATE switches from high to low. Note 7: VCL =ICL_ADJ * RADJ Note 8: Bias current flows out from the FB pin. Note 9: A 1000pF capacitor is connected between VIN and PGATE. www.national.com 4 |
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