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LM2745MTC bảng dữ liệu(PDF) 3 Page - National Semiconductor (TI) |
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LM2745MTC bảng dữ liệu(HTML) 3 Page - National Semiconductor (TI) |
3 / 23 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. V CC -0.3 to 7V BOOT Voltage -0.3 to 18V I SEN -0.3 to 14V FREQ/SYNC Voltage -0.5 to V CC + 0.3V All other pins -0.3 to V CC + 0.3V Junction Temperature 150˚C Storage Temperature −65˚C to 150˚C Soldering Information Lead Temperature (soldering, 10sec) 260˚C Infrared or Convection (20sec) 235˚C ESD Rating (Note 3) 2kV Operating Ratings Supply Voltage Range, V CC (Note 2) 3V to 6V BOOT Voltage Range 1V to 17V Junction Temperature Range (T J) −40˚C to +125˚C Thermal Resistance ( θ JA) 155˚C/W Electrical Characteristics V CC = 3.3V unless otherwise indicated. Typicals and limits appearing in plain type apply for TA=TJ= 25˚C. Limits appearing in boldface type apply over full Operating Temperature Range. Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis. Symbol Parameter Conditions Min Typ Max Units V FB FB Pin Voltage V CC =3Vto6V 0.591 0.6 0.609 V V ON UVLO Thresholds V CC Rising V CC Falling 2.79 2.42 V I Q_VCC Operating V CC Current V CC = 3.3V, VSD = 3.3V f SW = 600 kHz LM2745 1.1 1.7 2.3 mA LM2748 1.0 1.5 2.1 V CC = 5V, VSD = 3.3V f SW = 600 kHz LM2745 1.3 2 2.6 LM2748 1.0 1.8 2.6 Shutdown V CC Current V CC = 3.3V, VSD =0V 1 3 µA t PWGD1 PWGD Pin Response Time V FB Rising 10 µs t PWGD2 PWGD Pin Response Time V FB Falling 10 µs I SS-ON SS Pin Source Current V SS =0V 7 10 14 µA I SS-OC SS Pin Sink Current During Over Current V SS = 2.0V 90 µA I SEN-TH I SEN Pin Source Current Trip Point 25 40 55 µA I FB FB Pin Current Sourcing 20 nA ERROR AMPLIFIER GBW Error Amplifier Unity Gain Bandwidth 9 MHz G Error Amplifier DC Gain 118 dB SR Error Amplifier Slew Rate 2 V/µs I EAO EAO Pin Current Sourcing and Sinking Capability 14 16 mA V EAO Error Amplifier Output Voltage Minimum 1 V Maximum 2.2 V www.national.com 3 |
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