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LM2637 数据表(PDF) 2 Page - National Semiconductor (TI) |
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LM2637 数据表(HTML) 2 Page - National Semiconductor (TI) |
2 / 17 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 V DD 17V Junction Temperature 150˚C Power Dissipation (Note 2) 1.6W Storage Temperature −65˚C to +150˚C ESD Susceptibility 2.5 kV Soldering Time, Temperature (10 sec.) 300˚C Operating Ratings (Note 1) V CC 4.75V to 5.25V Junction Temperature Range 0˚C to +125˚C Electrical Characteristics V CC = 5V, VDD = 12V unless otherwise specified. Typicals and limits appearing in plain type apply for TA = TJ = +25˚C. Limits appearing in boldface type apply over the 0˚C to +70˚C range. Symbol Parameter Conditions Min Typ Max Units I EN EN Pin internal Pull-Up Current 60 90 140 µA I VID VID Pins internal Pull-Up Current 60 90 140 µA I CC Operating V CCCurrent EN = 5V, VID = 10111 6 7.5 mA I Q_VCC V CC Shutdown Current EN = 0V, VID Pins Floating 1.5 3 mA SWITCHING SECTION V DACOUT 5-Bit DAC Output Voltage (Note 3) N−1.5% NN+1.5% V I Q_VDD V DD Shutdown Current EN = 0V, VID Pins Floating 4 µA f OSC Oscillator Frequency RT = 100 k Ω 204 245 286 kHz RT = 25 k Ω 1000 D MAX Maximum Duty Cycle 95 % D MIN Minimum Duty Cycle 0 % R SNS1 SNS1 Pin Resistance to Ground 8.5 10 13 k Ω R DS_SRC Gate Driver Resistance When Sourcing Current 6 Ω R DS_SINK Gate Driver Resistance When Sinking Current 1.5 Ω V CC_TH1 Rising V CC Threshold for Power-On Reset 4 4.3 V V CC_TH2 Falling V CC Threshold for Power-On Reset 3.0 3.6 V V DAC_IH DAC Input High Voltage 3.5 V V DAC_IL DAC Input Low Voltage 1.3 V t PWGD PWGD Response Time SNS1 Rises from 0V to Rated Output Voltage 2 8.4 15 µs t PWBAD PWGD Response Time SNS1 Falls from Rated Output Voltage to 0V 2 3.4 10 µs V PWGD_HI PWGD High Trip Point % Above Rated Output Voltage when output Voltage ↑ 11.5 13 % % Above Rated Output Voltage when output Voltage ↓ (Note 4) 5 7 9 V PWGD_LO PWGD Low Trip Point % Below Rated Output Voltage when output Voltage ↑ 2.6 6 % % Below Rated Output Voltage when output Voltage ↓ (Note 4) 6 9.5 13 V OVP_TRP OVP Pin Trip Point % SNS1 Above Rated Output 15 18 21 % I CS+ CS+ Pin Sink Current CS+ = 5V 126 185 244 µA V OCP Over-Current Trip Point (CS+ and CS− Differential Voltage) CS+ = 2V, CS− Drops from 2V 41 55 69 mV www.national.com 2 |
类似零件编号 - LM2637 |
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类似说明 - LM2637 |
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