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LM2657MTCX データシート(PDF) 5 Page - National Semiconductor (TI) |
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LM2657MTCX データシート(HTML) 5 Page - National Semiconductor (TI) |
5 / 26 page Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Voltages from the indicated pins to GND unless otherwise indicated (Note 2): VIN -0.3V to 30V V5 -0.3V to 7V VDD -0.3V to 7V BOOT1, BOOT2 -0.3V to 36V BOOT1 to SW1, BOOT2 to SW2 -0.3V to 7V SW1, SW2 -0.3V to 30V ILIM1, ILIM2 -0.3V to 30V SENSE1, SENSE2, FB1, FB2 -0.3V to 7V PGOOD -0.3V to 7V EN -0.3V to 7V Junction Temperature +150˚C ESD Rating (Note 3) 2kV Ambient Storage Temperature Range -65˚C to +150˚C Soldering Dwell Time, Temperature Wave Infrared Vapor Phase 4 sec, 260˚C 10 sec, 240˚C 75 sec, 219˚C Operating Ratings (Note 1) VIN 4.5V to 28V VDD, V5 4.5V to 5.5V Junction Temperature -40˚C to +125˚C Electrical Characteristics Specifications with standard typeface are for T J = 25˚C, and those with boldface apply over full Operating Junction Temperature range. VDD = V5 = 5V, V SGND =VPGND = 0V, VIN = 15V, VEN = 3V, RFADJ = 22.1k Ω un- less otherwise stated (Note 4). Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. Symbol Parameter Conditions Min Typical (Note 5) Max Units Reference V FB FB Pin Voltage at Regualtion (either FB Pin) VDD = 4.5V to 5.5V, VIN = 4.5V to 28V 591 600 609 mV V FB_LINE REG V FB Line Regulation ( ∆V FB) VDD = 4.5V to 5.5V, VIN = 4.5V to 28V 0.5 I FB FB Pin Current (sourcing) V FB at regulation 20 100 nA Chip Supply I Q_VIN VIN Quiescent Current V FB1 =VFB2 = 0.7V 100 200 µA I SD_VIN VIN Shutdown Current V EN =0V 0 5 µA I Q_VDD VDD Quiescent Current V FB1 =VFB2 = 0.7V 2.5 4 mA I SD_VDD VDD Shutdown Current V EN =0V 6 15 µA I Q_V5 V5 Normal Operating Current V FB1 =VFB2 = 0.7V 0.3 0.5 mA V FB1 =VFB2 = 0.5V 1 1.5 I SD_V5 V5 Shutdown Current V EN =0V 0 5 µA I Q_BOOT BOOT Quiescent Current V FB1 =VFB2 = 0.7V 2 5 µA V FB1 =VFB2 = 0.5V 300 500 I SD_BOOT BOOT Shutdown Current V EN =0V 1 5 µA V DD_UVLO VDD UVLO Threshold VDD rising up to V UVLO 3.9 4.2 4.5 V VDD UVLO Hysteresis VDD = V5 falling from V UVLO 0.5 0.7 0.9 V V IN_UVLO VIN UVLO Threshold VIN rising up to V UVLO 3.9 4.2 4.5 V VIN UVLO Hysteresis VIN falling from V UVLO 0.1 0.3 V Logic I EN EN Input Current V EN =0to5V 0 µA V EN_HI Minimum EN Input Logic High 2 V V EN_LO Maximum EN Input Logic Low 0.8 V R FPWM FPWM Pull-down V FPWM =2V 100 200 1000 k Ω www.national.com 5 |
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