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LT1913 Datasheet(PDF) 1 Page - Linear Technology |
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LT1913 Datasheet(HTML) 1 Page - Linear Technology |
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1 / 24 page  LT1913 1 1913f 25V, 3.5A, 2.4MHz Step-Down Switching Regulator The LT ®1913 is an adjustable frequency (200kHz to 2.4MHz) monolithic buck switching regulator that accepts input voltages up to 25V. 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. 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 LT1913 is available in 10-Pin 3mm × 3mm DFN packages with ex- posed 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 25V ■ 3.5A Maximum Output Current ■ 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 25V ■ Thermal Protection ■ Soft-Start Capability ■ Small 10-Pin (3mm × 3mm) DFN Packages 5V Step-Down Converter APPLICATIO S FEATURES DESCRIPTIO TYPICAL APPLICATIO SW FB VC PG RT VIN BD VIN 6.5V TO 25V VOUT 5V 3.5A 10μF 0.47μF 680pF 47μF 100k 15k 63.4k 4.7μH 536k GND OFF ON LT1913 1913 TA01a RUN/SS BOOST SYNC Efficiency , LT, LTC and LTM are registered trademarks 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 1913 G01 60 90 80 1.5 3 3.5 VIN = 12V VOUT = 5V L = 4.7μH f = 600kHz VIN = 24V |
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