전자부품 데이터시트 검색엔진 |
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LM2744 데이터시트(PDF) 3 Page - National Semiconductor (TI) |
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LM2744 데이터시트(HTML) 3 Page - National Semiconductor (TI) |
3 / 22 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 21V 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) 2 kV Operating Ratings Supply Voltage Range (V CC) 3Vto6V Junction Temperature Range (T J) −40˚C to +125˚C Thermal Resistance ( θ JA) 155˚C/W Voltage on FB and V REF 0.5V to 1.5V 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 ON UVLO Thresholds Rising Falling 2.76 2.42 V I Q_VCC Operating V CC Current V CC = 3.3V, VSD = 3.3V Fsw = 600kHz 1.0 1.5 2.1 mA V CC = 5V, VSD = 3.3V Fsw = 600kHz 1.0 1.7 2.1 Shutdown V CC Current V CC = 3.3V, VSD = 0V 1 25 µA t PWGD1 PWGD Pin Response Time V FB Rising 6 µs t PWGD2 PWGD Pin Response Time V FB Falling 6 µs I SS-ON SS Pin Source Current V SS =0V 5 10 15 µA I SS-OC SS Pin Sink Current During Over Current V SS = 2.5V 90 µA I SEN-TH I SEN Pin Source Current Trip Point 20 40 60 µA ERROR AMPLIFIER V OS Error Amplifier Input Offset Voltage -8 1 8 mV GBW Error Amplifier Unity Gain Bandwidth 9 MHz G Error Amplifier DC Gain 106 dB SR Error Amplifier Slew Rate 3.2 V/µs I EAO EAO Pin Current Sourcing and Sinking Capability V EAO = 1.5, FB = 0.55V V EAO = 1.5, FB = 0.65V 2.6 9.2 mA V EA Error Amplifier Output Voltage Minimum 0 V Maximum 2 V www.national.com 3 |
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