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LCYK 数据表(PDF) 1 Page - Linear Technology |
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LCYK 数据表(HTML) 1 Page - Linear Technology |
1 / 24 page LT3680 1 3680fa 36V, 3.5A, 2.4MHz Step-Down Switching Regulator with 75µA Quiescent Current The LT ®3680 is an adjustable frequency (200kHz to 2.4MHz) monolithic buck switching regulator that accepts input voltages up to 36V. A high efficiency 95m 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. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 15mV in a typical application. In addition, the LT3680 can further enhance low output current efficiency by drawing bias current from the output when VOUT is above 3V. Shutdown 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 91% of the programmed output voltage. The LT3680 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 Voltage Range: 3.6V to 36V ■ 3.5A Maximum Output Current ■ Low Ripple (<15mVP-P) Burst Mode ® Operation: IQ = 75μA at 12VIN to 3.3VOUT ■ Adjustable Switching Frequency: 200kHz to 2.4MHz ■ Low Shutdown Current: IQ < 1μA ■ Integrated Boost Diode ■ Synchronizable Between 250kHz to 2MHz ■ Power Good Flag ■ Saturating Switch Design: 95m On-Resistance ■ 0.790V Feedback Reference Voltage ■ Output Voltage: 0.79V to 30V ■ Thermal Protection ■ Soft-Start Capability ■ Small 10-Pin Thermally Enhanced MSOP and (3mm × 3mm) DFN Packages 5V Step-Down Converter SW FB VC PG RT VIN BD VIN 6.3V TO 36V VOUT 5V 3.5A 10μF 0.47μF 680pF 47μF 100k 15k 63.4k 4.7μH 536k GND OFF ON LT3680 3680 TA01a RUN/SS BOOST SYNC Efficiency , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Burst Mode is a registered trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. OUTPUT CURRENT (A) 0 0.5 50 70 100 1 2 2.5 3680 G01 60 90 80 1.5 3 3.5 VIN = 12V VIN = 34V VOUT = 5V L = 4.7μH f = 600kHz VIN = 24V TYPICAL APPLICATION DESCRIPTION FEATURES APPLICATIONS |
类似零件编号 - LCYK |
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类似说明 - LCYK |
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