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LM2771 Fiches technique(PDF) 3 Page - National Semiconductor (TI) |
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LM2771 Fiches technique(HTML) 3 Page - National Semiconductor (TI) |
3 / 10 page Absolute Maximum Ratings (Notes 1, 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. V IN Pin Voltage -0.3V to 6.0V EN Pin Voltage -0.3V to (V IN+0.3V) w/ 6.0V max Continuous Power Dissipation (Note 3) Internally Limited Junction Temperature (T J-MAX) 150oC Storage Temperature Range -65oC to +150o C Maximum Lead Temperature (Note 4) 265oC ESD Rating (Note 5) Human Body Model: Machine Model 2.0kV 200V Operating Ratings (Notes 1, 2) Input Voltage Range 2.7V to 5.5V Recommended Load Current Range 0mA to 250mA Junction Temperature (T J) Range -30˚C to +110˚C Ambient Temperature (T A) Range (Note 6) -30˚C to +85˚C Thermal Properties Junction-to-Ambient Thermal Resistance ( θ JA), LLP10 Package (Note 7) 55˚C/W Electrical Characteristics (Notes 2, 8) Limits in standard typeface are for T J =25 oC. Limits in boldface type apply over the full operating junction temperature range (-30˚C ≤ T J ≤ +110˚C) . Unless otherwise noted, specifications apply to the LM2771 Typical Application Circuit (pg. 1) with: V IN = 3.6V; V(EN) = 1.8V, C IN =C1 = 1.0µF, COUT = 4.7µF. (Note 9) Symbol Parameter Condition Min Typ Max Units V OUT 1.5V Output Voltage Regulation 3.0V ≤ V IN ≤ 5.5V 0mA ≤ I OUT ≤ 200mA 1.455 (−3%) 1.5 1.545 (+3%) V 3.0V ≤ V IN ≤ 5.5V I OUT = 150mA 1.475 (−1.7%) 1.5 1.525 (+1.7%) 3.0V < V IN ≤ 5.5V, 0mA ≤ I OUT ≤ 250mA 1.445 (−3.7%) 1.5 1.545 (+3%) V OUT/IOUT Output Load Regulation V OUT = 1.5V 0mA ≤ I OUT ≤ 250mA 0.17 mV/mA V OUT/VIN Output Line Regulation 0.1 %/V E Power Efficiency I OUT = 200mA 81 % I Q Quiescent Supply Current I OUT = 0mA (Note 10) 45 50 µA V R Fixed Frequency Output Ripple 40mA ≤ I OUT ≤ 250mA 8 mV V R–PFM PFM–Mode Output Ripple I OUT < 40mA 12 mV I SD Shutdown Current V(EN) = 0V 0.1 0.5 µA F SW Switching Frequency 3.2V ≤ V IN ≤ 5.5V 0.80 1.1 1.40 MHz R OL Open–Loop Output Resistance I OUT = 200mA (Note 11) 1.0 Ω I CL Output Current Limit V IN = 5.5V 0V ≤ V OUT ≤ 0.2V (Note 12) 500 mA t ON Turn-on Time 150 µs V IL Logic-low Input Voltage 3.0V ≤ V IN ≤ 5.5V 0 0.5 V V IH Logic-high Input Voltage 3.0V ≤ V IN ≤ 5.5V 0.95 V IN V I IH Logic-high Input Current V(EN) = 1.8V (Note 13) 5µA I IL Logic-low Input Current Logic Input = 0V 0.1 µA Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation of the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions, see the Electrical Characteristics tables. Note 2: All voltages are with respect to the potential at the GND pins. Note 3: Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at TJ=150 oC (typ.) and disengages at TJ=140 oC (typ.). www.national.com 3 |
Numéro de pièce similaire - LM2771 |
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Description similaire - LM2771 |
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