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LM4050AIM3X-4.1 Datasheet(PDF) 8 Page - National Semiconductor (TI) |
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LM4050AIM3X-4.1 Datasheet(HTML) 8 Page - National Semiconductor (TI) |
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8 / 15 page  LM4050-10.0 Electrical Characteristics Boldface limits apply for T A =TJ =TMIN to TMAX; all other limits TA =TJ = 25˚C. The grades A, B and C designate initial Reverse Breakdown Voltage tolerances of ±0.1% and ±0.2% and 0.5% respectively. Symbol Parameter Conditions Typical (Note 4) LM4050AIM3 LM4050AEM3 Limits (Note 5) LM4050BIM3 LM4050BEM3 Limits (Note 5) LM4050CIM3 LM4050CEM3 Limits (Note 5) Units (Limit) VR Reverse Breakdown Voltage IR = 150 µA 10.00 V Reverse Breakdown Voltage Tolerance (Note 6) IR = 150 µA ±10 ±20 ±50 mV (max) Industrial Temp. Range ±43 ±53 ±83 mV (max) Extended Temp. Range ±60 ±70 ±100 mV (max) IRMIN Minimum Operating Current 80 µA 100 100 100 µA (max) Industrial Temp. Range 103 103 103 µA (max) Extended Temp. Range 110 110 110 µA (max) ∆VR/∆T Average Reverse Breakdown Voltage Temperature Coefficient (Note 6) IR =10 mA ±40 ppm/˚C IR =1 mA ±20 ppm/˚C IR = 150 µA ±20 ±50 ±50 ±50 ppm/˚C (max) ∆VR/∆IR Reverse Breakdown Voltage Change with Operating Current Change (Note 7) IRMIN ≤ IR ≤ 1 mA 0.8 mV 1.5 1.5 1.5 mV (max) 3.5 3.5 3.5 mV (max) 1mA ≤ IR ≤ 15 mA 8.0 mV 12.0 12.0 12.0 mV (max) 23.0 23.0 23.0 mV (max) ZR Reverse Dynamic Impedance IR = 1 mA, f = 120 Hz, 0.7 Ω IAC = 0.1 IR eN Wideband Noise IR = 150 µA 150 µVrms 10 Hz ≤ f ≤ 10 kHz ∆VR Reverse Breakdown Voltage Long Term Stability t = 1000 hrs T = 25˚C ±0.1˚C 120 ppm IR = 150 µA VHYST Thermal Hysteresis (Note 8) ∆T = −40˚C to 125˚C 2.8 mV Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions. Note 2: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJmax (maximum junction temperature), θJA (junction to ambient thermal resistance), and TA (ambient temperature). The maximum allowable power dissipation at any temperature is PDmax =(TJmax −TA)/θJA or the number given in the Absolute Maximum Ratings, whichever is lower. For the LM4050, TJmax = 125˚C, and the typical thermal resistance (θJA), when board mounted, is 326˚C/W for the SOT-23 package. Note 3: The human body model is a 100 pF capacitor discharged through a 1.5 k Ω resistor into each pin. The machine model is a 200 pF capacitor discharged directly into each pin. Note 4: Typicals are at TJ = 25˚C and represent most likely parametric norm. Note 5: Limits are 100% production tested at 25˚C. Limits over temperature are guaranteed through correlation using Statistical Quality Control (SQC) methods. The limits are used to calculate National’s AOQL. Note 6: The boldface (over-temperature) limit for Reverse Breakdown Voltage Tolerance is defined as the room temperature Reverse Breakdown Voltage Tolerance ±[( ∆V R/∆T)(max∆T)(VR)]. Where, ∆VR/∆T is the VR temperature coefficient, max∆T is the maximum difference in temperature from the reference point of 25˚C to T MIN or TMAX, and VR is the reverse breakdown voltage. The total over-temperature tolerance for the different grades in the industrial temperature range where max ∆T = 65˚C is shown below: A-grade: ±0.425% = ±0.1% ±50 ppm/˚C x 65˚C B-grade: ±0.525% = ±0.2% ±50 ppm/˚C x 65˚C C-grade: ±0.825% = ±0.5% ±50 ppm/˚C x 65˚C Therefore, as an example, the A-grade LM4050-2.5 has an over-temperature Reverse Breakdown Voltage tolerance of ±2.5V x 0.425% = ±11 mV. Note 7: Load regulation is measured on pulse basis from no load to the specified load current. Output changes due to die temperature change must be taken into account separately. Note 8: Thermal hysteresis is defined as the difference in voltage measured at +25˚C after cycling to temperature -40˚C and the 25˚C measurement after cycling to temperature +125˚C. www.national.com 8 |
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