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LM2742 Datasheet(PDF) 3 Page - National Semiconductor (TI) |
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LM2742 Datasheet(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 7V BOOTV 21V LG and HG to GND (Note 3) -2V to 21V 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 2 kV Operating Ratings Supply Voltage (V CC) 4.5V to 5.5V Junction Temperature Range −40˚C to +125˚C Thermal Resistance ( θ JA) 155˚C/W Electrical Characteristics V CC = 5V 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_ADJ FB Pin Voltage V CC = 4.5V, 0˚C to +125˚C 0.591 0.6 0.609 V V CC = 5V, 0˚C to +125˚C 0.591 0.6 0.609 V CC = 5.5V, 0˚C to +125˚C 0.591 0.6 0.609 V CC = 4.5V, −40˚C to +125˚C 0.589 0.6 0.609 V CC = 5V, −40˚C to +125˚C 0.589 0.6 0.609 V CC = 5.5V, −40˚C to +125˚C 0.589 0.6 0.609 V ON UVLO Thresholds Rising Falling 4.2 3.6 V I Q-V5 Operating V CC Current SD = 5V, FB = 0.55V Fsw = 600kHz 1 1.5 2 mA SD = 5V, FB = 0.65V Fsw = 600kHz 0.8 1.7 2.2 Shutdown V CC Current SD = 0V 0.15 0.4 0.7 mA t PWGD1 PWGD Pin Response Time FB Voltage Going Up 6 µs t PWGD2 PWGD Pin Response Time FB Voltage Going Down 6 µs I SD SD Pin Internal Pull-up Current 20 µA I SS-ON SS Pin Source Current SS Voltage = 2.5V 0˚C to +125˚C -40˚C to +125˚C 8 5 11 11 15 15 µA I SS-OC SS Pin Sink Current During Over Current SS Voltage = 2.5V 95 µA I SEN-TH I SEN Pin Source Current Trip Point 0˚C to +125˚C -40˚C to +125˚C 35 28 50 50 65 65 µA ERROR AMPLIFIER GBW Error Amplifier Unity Gain Bandwidth 5 MHz G Error Amplifier DC Gain 60 dB SR Error Amplifier Slew Rate 6 V/µA I FB FB Pin Bias Current FB = 0.55V FB = 0.65V 0 0 15 30 100 155 nA I EAO EAO Pin Current Sourcing and Sinking V EAO = 2.5, FB = 0.55V V EAO = 2.5, FB = 0.65V 2.8 0.8 mA V EA Error Amplifier Maximum Swing Minimum Maximum 1.2 3.2 V www.national.com 3 |
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