LTC3405A
Info: : PRODUCTION
searchIcon
cartIcon

LTC3405A

1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT

Show More showmore-icon

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $2.19
Features
  • High Efficiency: Up to 96%
  • Very Low Quiescent Current: Only 20µA During Operation
  • 300mA Output Current at VIN = 3V
  • 2.5V to 5.5V Input Voltage Range
  • 1.5MHz Constant Frequency Operation
  • No Schottky Diode Required
  • Low Dropout Operation: 100% Duty Cycle
  • Stable with Ceramic Capacitors
  • 0.8V Reference Allows Low Output Voltages
  • Shutdown Mode Draws
  • ±2% Output Voltage Accuracy
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Overtemperature Protected
  • Low Profile (1mm) ThinSOT Package
Additional Details
show more Icon

The LTC3405A is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current during operation is only 20µA and drops to <1µA in shutdown. The 2.5V to5.5V input voltage range makes the LTC3405A ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems.

Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors.The LTC3405A is specifically designed to work well with ceramic output capacitors, achieving very low output voltage ripple and a small PCB footprint.

The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.8V feedback reference voltage. The LTC3405A is available in a low profile (1mm) ThinSOT package.

For fixed 1.5V and 1.8V output versions, refer to theLTC3405A-1.5/LTC3405A-1.8 data sheet.

Protected by U.S. Patents, including 6580258, 5481178.


Vout Features
LTC3405 Adj. -
LTC3405A Adj. Stable With All Ceramic Caps

LTC3405A-1.375

1.375V Stable With All Ceramic Caps
LTC3405A-1.5 1.5V Stable With All Ceramic Caps
LTC3405A-1.8 1.8V Stable With All Ceramic Caps


Applications

  • Cellular Telephones
  • Personal Information Appliances
  • Wireless and DSL Modems
  • Digital Still Cameras
  • MP3 Players
  • Portable Instruments


Part Models 2
1ku List Price Starting From $2.19

close icon
Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3405AES6#TRMPBF
  • HTML
  • HTML
LTC3405AES6#TRPBF
  • HTML
  • HTML
Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

DC480A-E

LTC3405AES6 | ThinSOT Synchronous Buck Regulator, 2.5 to 5.5 VIN, Adjustable (1.2V) VOUT @ 300mA(3.0 VIN min), (Small Size Inductor)

zoom

DC480A-E

LTC3405AES6 | ThinSOT Synchronous Buck Regulator, 2.5 to 5.5 VIN, Adjustable (1.2V) VOUT @ 300mA(3.0 VIN min), (Small Size Inductor)

LTC3405AES6 | ThinSOT Synchronous Buck Regulator, 2.5 to 5.5 VIN, Adjustable (1.2V) VOUT @ 300mA(3.0 VIN min), (Small Size Inductor)

Product Detail

DC480A-E: Demo Board for the LTC3405A 1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT.

reference details image

DC480A-F

LTC3405AES6 | ThinSOT Synchronous Buck Regulator, 2.5 to 5.5 VIN, Adjustable (1.2V) VOUT @ 300mA(3.0 VIN min), (High Efficiency Inductor)

zoom

DC480A-F

LTC3405AES6 | ThinSOT Synchronous Buck Regulator, 2.5 to 5.5 VIN, Adjustable (1.2V) VOUT @ 300mA(3.0 VIN min), (High Efficiency Inductor)

LTC3405AES6 | ThinSOT Synchronous Buck Regulator, 2.5 to 5.5 VIN, Adjustable (1.2V) VOUT @ 300mA(3.0 VIN min), (High Efficiency Inductor)

Product Detail

DC480A-F: Demo Board for the LTC3405A 1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT.

Tools & Simulations

Tools & Simulations 2

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Recently Viewed