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LM2731XMFX Scheda tecnica(PDF) 5 Page - National Semiconductor (TI) |
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LM2731XMFX Scheda tecnica(HTML) 5 Page - National Semiconductor (TI) |
5 / 16 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. Storage Temperature Range −65˚C to +150˚C Operating Junction Temperature Range −40˚C to +125˚C Lead Temp. (Soldering, 5 sec.) 300˚C Power Dissipation (Note 2) Internally Limited FB Pin Voltage −0.4V to +6V SW Pin Voltage −0.4V to +22V Input Supply Voltage −0.4V to +14.5V Shutdown Input Voltage (Survival) −0.4V to +14.5V θ J-A (SOT23-5) 265˚C/W ESD Rating (Note 3) Human Body Model 2 kV Electrical Characteristics Limits in standard typeface are for T J = 25˚C, and limits in boldface type apply over the full operating temperature range (−40˚C ≤ T J ≤ +125˚C). Unless otherwise specified: V IN = 5V, VSHDN = 5V, IL = 0A. Symbol Parameter Conditions Min (Note 4) Typical (Note 5) Max (Note 4) Units V IN Input Voltage 2.7 14 V V OUT (MIN) Minimum Output Voltage Under Load R L =43 Ω X Option (Note 8) V IN = 2.7V 5.4 7V V IN = 3.3V 8 10 V IN =5V 13 17 R L =43 Ω Y Option (Note 8) V IN = 2.7V 8.25 10 V IN = 3.3V 10.5 12 V IN =5V 14 16 R L =15 Ω X Option (Note 8) V IN = 2.7V 3.75 5 V IN = 3.3V 5 6.5 V IN =5V 8.75 11 R L =15 Ω Y Option (Note 8) V IN = 2.7V 5 6 V IN = 3.3V 5.5 7.5 V IN =5V 9 11 I SW Switch Current Limit (Note 6) 1.8 1.4 2A R DS(ON) Switch ON Resistance I SW = 100 mA Vin=5V 260 400 500 m Ω I SW = 100 mA Vin = 3.3V 300 450 550 SHDN TH Shutdown Threshold Device ON 1.5 V Device OFF 0.50 I SHDN Shutdown Pin Bias Current V SHDN =0 0 µA V SHDN =5V 0 2 V FB Feedback Pin Reference Voltage V IN =3V 1.205 1.230 1.255 V I FB Feedback Pin Bias Current V FB = 1.23V 60 500 nA I Q Quiescent Current V SHDN = 5V, Switching "X" 2 3.0 mA V SHDN = 5V, Switching "Y" 1.0 2 V SHDN = 5V, Not Switching 400 500 µA V SHDN = 0 0.024 1 FB Voltage Line Regulation 2.7V ≤ V IN ≤ 14V 0.02 %/V F SW Switching Frequency (Note 7) “X” Option 1 1.6 1.85 MHz “Y” Option 0.40 0.60 0.8 D MAX Maximum Duty Cycle (Note 7) “X” Option 86 93 % “Y” Option 92 96 www.national.com 5 |
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