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LTC3405A Datasheet

LTC3405A Datasheet

1.5MHz, 300mA Synchronous Step-Down Regulator in ThinSOT
Part No.: LTC3405A
Page: 16 Pages
Size: 199 KB
Manufacturer: Linear Technology
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Views: 2
Update Time: 2023-11-03 15:52:09
DataSheet: Download

LTC3405A Datasheet Applicable Part

Part No. Packing SPQ Marking MSL Pins Temp Range Package Description Buy
LTC3405AES6#PBF Tube   LTZW 1 6 -40°C ~ 125°C 6-Lead TSOT-23  
LTC3405AES6#TRPBF Reel 2500 LTZW 1 6 -40°C ~ 125°C 6-Lead TSOT-23  
LTC3405AES6#TRMPBF Reel 500 LTZW 1 6 -40°C ~ 125°C 6-Lead TSOT-23  
SPQ:Standard Pack Quantity;MSL:Moisture Sensitivity Level

LTC3405A Datasheet(PDF)

LTC3405A Datasheet(Picture)

LTC3405A 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

LTC3405A Applications

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

LTC3405A Description

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.

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