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LM2700LDX-ADJ Datasheet(PDF) 4 Page - National Semiconductor (TI) |
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LM2700LDX-ADJ Datasheet(HTML) 4 Page - National Semiconductor (TI) |
4 / 17 page Absolute Maximum Ratings (Note 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. V IN 12V SW Voltage 18V FB Voltage 7V V C Voltage 0.965V ≤ V C ≤ 1.565V SHDN Voltage (Note 1) 7V FSLCT (Note 1) 12V Maximum Junction Temperature 150˚C Power Dissipation(Note 3) Internally Limited Lead Temperature 300˚C Vapor Phase (60 sec.) 215˚C Infrared (15 sec.) 220˚C ESD Susceptibility (Note 4) Human Body Model 2kV Machine Model 200V Operating Conditions Operating Junction Temperature Range (Note 5) −40˚C to +125˚C Storage Temperature −65˚C to +150˚C Supply Voltage 2.2V to 12V SW Voltage 17.5V Electrical Characteristics Specifications in standard type face are for T J = 25˚C and those with boldface type apply over the full Operating Tempera- ture Range (T J = −40˚C to +125˚C) Unless otherwise specified. VIN =2.2V and IL = 0A, unless otherwise specified. Symbol Parameter Conditions Min (Note 5) Typ (Note 6) Max (Note 5) Units I Q Quiescent Current FB = 2.2V (Not Switching) FSLCT = 0V 1.2 2 mA FB = 2.2V (Not Switching) FSLCT = V IN 1.3 2 mA V SHDN =0V 5 20 µA V FB Feedback Voltage 1.2285 1.26 1.2915 V I CL(Note 7) Switch Current Limit V IN = 2.7V (Note 8) 2.55 3.6 4.3 A %V FB/ ∆V IN Feedback Voltage Line Regulation 2.2V ≤ V IN ≤ 12.0V 0.02 0.07 %/V I B FB Pin Bias Current (Note 9) 0.5 40 nA V IN Input Voltage Range 2.2 12 V g m Error Amp Transconductance ∆I = 5µA 40 155 290 µmho A V Error Amp Voltage Gain 135 V/V D MAX Maximum Duty Cycle FSLCT = Ground 78 85 % D MIN Minimum Duty Cycle FSLCT = Ground 15 % FSLCT = V IN 30 f S Switching Frequency FSLCT = Ground 480 600 720 kHz FSLCT = V IN 1 1.25 1.5 MHz I SHDN Shutdown Pin Current V SHDN =VIN 0.008 1 µA V SHDN =0V −0.5 −1 I L Switch Leakage Current V SW = 18V 0.02 20 µA R DSON Switch R DSON (Note 10) V IN = 2.7V, ISW =2A 80 150 m Ω Th SHDN SHDN Threshold Output High 0.9 0.6 V Output Low 0.6 0.3 V UVP On Threshold 1.95 2.05 2.2 V Off Threshold 1.85 1.95 2.1 V θ JA Thermal Resistance (Note 11) TSSOP, package only 150 ˚C/W LLP, package only 45 Note 1: This voltage should never exceed VIN. Note 2: Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the device is intended to be functional, but device parameter specifications may not be guaranteed. For guaranteed specifications and test conditions, see the Electrical Characteristics. www.national.com 4 |
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