LTC3405A-1.8
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LTC3405A-1.8

1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT

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LTspice LTC3405A-1.8 - Step-Down (Buck) Regulators Download 0.92 KB
Part Models 2
1ku List Price Starting From $2.19
Features
  • High Efficiency: Up to 93%
  • 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
  • Shutdown Mode Draws <1µA Supply Current
  • ±3% Output Voltage Accuracy
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Overtemperature Protected
  • Low Profile (1mm) ThinSOT™ Package
Additional Details
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The LTC3405A-1.5/LTC3405A-1.8 are high efficiency monolithic synchronous buck regulators using a constant frequency, current mode architecture. Supply current during operation is only 20µA and drops to <1µA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3405A-1.5/LTC3405A-1.8 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-1.5/LTC3405A-1.8 are 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. The LTC3405A-1.5/LTC3405A-1.8 are available in a low profile (1mm) ThinSOT package.

For adjustable output voltage, refer to the LTC3405A 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
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LTspice LTC3405A-1.8 - Step-Down (Buck) Regulators Download 0.92 KB
Part Models 2
1ku List Price Starting From $2.19
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LTC3405A-1.8

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Data Sheet

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UPDATED 08/27/2007
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LTC3405A-1.5/LTC3405A-1.8: 1.5V, 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT Data Sheet

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User Guide

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UPDATED 09/24/2009
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DC480A - Demo Manual redirect icon

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Design Note

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UPDATED 11/16/2007
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DN1008 - Simple, Efficient, All-in-One USB Power Management IC Solution redirect icon

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Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3405AES6-1.8#TRMPBF 6-Lead TSOT-23 external-link
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  • Material Declaration external-link
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LTC3405AES6-1.8#TRPBF 6-Lead TSOT-23 external-link
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Software & Part Ecosystem

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PRODUCTION

Ultra-Low Power Supervisor with Power-Fail Output, Selectable Thresholds

Evaluation Kits 2

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DC480A-D

LTC3405AES6-1.8 | ThinSOT Synchronous Buck Regulator, 2.5 to 5.5 VIN, 1.8VOUT 300mA(3.0 VIN min), (High Efficiency Inductor)

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DC480A-D

LTC3405AES6-1.8 | ThinSOT Synchronous Buck Regulator, 2.5 to 5.5 VIN, 1.8VOUT 300mA(3.0 VIN min), (High Efficiency Inductor)

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Download

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DC480A-D
LTC3405AES6-1.8 | ThinSOT Synchronous Buck Regulator, 2.5 to 5.5 VIN, 1.8VOUT 300mA(3.0 VIN min), (High Efficiency Inductor)
Buy Now View Details

Product Detail

DC480A-D: Demo Board for the LTC3405A-1.8 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT.

Resources

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DC480A - Design File Download

481.00K

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PDF

DC480A - Schematic Download

14.00K

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PDF

DC480A - Demo Manual Download

25.00K

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DC480A-C

LTC3405AES6-1.8 | Thin SOT Synchronous Buck Regulator, 2.5 to 5.5 VIN, 1.8VOUT 300mA(3.0 VIN min), (Small size Inductor)

zoom

DC480A-C

LTC3405AES6-1.8 | Thin SOT Synchronous Buck Regulator, 2.5 to 5.5 VIN, 1.8VOUT 300mA(3.0 VIN min), (Small size Inductor)

download icon

Download

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DC480A-C
LTC3405AES6-1.8 | Thin SOT Synchronous Buck Regulator, 2.5 to 5.5 VIN, 1.8VOUT 300mA(3.0 VIN min), (Small size Inductor)
Buy Now View Details

Product Detail

DC480A-C: Demo Board for the LTC3405A-1.8 1.8V, 1.5MHz, 300mA Synchronous Step-Down Regulators in ThinSOT.


 


Resources

pdf icon

ZIP

DC480A - Design File Download

481.00K

pdf icon

PDF

DC480A - Schematic Download

14.00K

pdf icon

PDF

DC480A - Demo Manual Download

25.00K

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Evaluation Kits2

evaluation kit item images

DC480A-D

LTC3405AES6-1.8 | ThinSOT Synchronous Buck Regulator, 2.5 to 5.5 VIN, 1.8VOUT 300mA(3.0 VIN min), (High Efficiency Inductor)
evaluation kit item images

DC480A-C

LTC3405AES6-1.8 | Thin SOT Synchronous Buck Regulator, 2.5 to 5.5 VIN, 1.8VOUT 300mA(3.0 VIN min), (Small size Inductor)

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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LTC3405A-1.8 - Step-Down (Buck) Regulators Download

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