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LCVT Datasheet(PDF) 1 Page - Linear Technology |
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LCVT Datasheet(HTML) 1 Page - Linear Technology |
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1 / 24 page  LT3684 1 3684f 36V, 2A, 2.8MHz Step-Down Switching Regulator The LT ®3684isanadjustablefrequency(300kHzto2.8MHz) monolithic buck switching regulator that accepts input voltages up to 34V (36V maximum). A high efficiency 0.18 Ω switch is included on the die along with a boost Schottky diode and the necessary oscillator, control and logic circuitry. Current mode topology is used for fast transient response and good loop stability. The LT3684’s high operating frequency allows the use of small, low cost inductors and ceramic capacitors resulting in low output ripple while keeping total solution size to a minimum. The low current shutdown mode reduces input supply current to less than 1µA while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). A power good flag signals when VOUT reaches 90% of the programmed output voltage. The LT3684 is available in 10-Pin MSOP and 3mm × 3mm DFN packages with Exposed Pads for low thermal resistance. ■ Automotive Battery Regulation ■ Power for Portable Products ■ Distributed Supply Regulation ■ Industrial Supplies ■ Wall Transformer Regulation ■ Wide Input Range: 3.6V to 34V Operating, 36V Maximum ■ 2A Maximum Output Current ■ Adjustable Switching Frequency: 300kHz to 2.8MHz ■ Low Shutdown Current: IQ < 1µA ■ Integrated Boost Diode ■ Power Good Flag ■ Saturating Switch Design: 0.18 Ω On-Resistance ■ 1.265V Feedback Reference Voltage ■ Output Voltage: 1.265V to 20V ■ Soft-Start Capability ■ Small 10-Pin Thermally Enhanced MSOP and (3mm × 3mm) DFN Packages 3.3V Step-Down Converter Efficiency FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. SW BIAS FB VC PG RT VIN BD VIN 4.5V TO 34V VOUT 3.3V 2A 4.7 µF 0.47 µF 330pF 22 µF 200k 16.2k 60.4k 4.7 µH 324k GND OFF ON LT3684 3684 TA01 RUN/SS BOOST LOAD CURRENT (A) 0 30 40 50 60 70 80 90 0.5 1 1.5 2 3684 TA01b VIN = 12V VOUT = 3.3V L = 4.7 µH f = 800kHz |
Número de pieza similar - LCVT |
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Descripción similar - LCVT |
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