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LT1913

Linear
Part Number LT1913
Manufacturer Linear
Description Step-Down Switching Regulator
Published Apr 20, 2016
Detailed Description U U LT1913 25V, 3.5A, 2.4MHz Step-Down Switching Regulator FEATURES ■ Wide Input Range: 3.6V to 25V ■ 3.5A Maximum Out...
Datasheet PDF File LT1913 PDF File

LT1913
LT1913

Overview
U U LT1913 25V, 3.
5A, 2.
4MHz Step-Down Switching Regulator FEATURES ■ 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 U APPLICATIO S ■ Automotive Battery Regulation ■ Power for Portable Products ■ Distributed Supply Regulation ■ Industrial Supplies ■ Wall Transformer Regulation DESCRIPTIO 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 exposed pads for low thermal resistance.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO 5V Step-Down Converter VIN 6.
5V TO 25V VIN BD OFF ON RUN/SS BOOST 10μF 680pF 15k 63.
4k VC LT1913 RT PG SYNC GND SW FB VOUT 5V 3.
5A 0.
47μF 4.
7μH 536k 100k 47μF 1913 TA01a EFFICIENCY (%) Efficiency 100 VIN = 12V 90 80 VIN = 24V 70 60 VOUT = 5V L = 4.
7μH f = 600kHz 50 0 0.
5 1 1.
5 2 2.
5 OUTPUT CURRENT (A) 3 3.
5 1913 G01 1913f 1 LT1913 U WW W ABSOLUTE AXI U RATI GS (Note 1) VIN, RUN/SS Voltage.
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