Overview

Features and Benefits

  • High Efficiency: Up to 96%
  • Very Low Quiescent Current: Only 20µA
  • Low Output Ripple Voltage During Burst Mode® Operation
  • 600mA Output Current
  • 2.5V to 5.5V Input Voltage Range
  • 1.5MHz Constant Frequency Operation
  • No Schottky Diode Required
  • Low Dropout Operation: 100% Duty Cycle
  • ±2% 0.6V Reference
  • Shutdown Mode Draw ≤1µA Supply Current
  • Internal Soft-Start Limits Inrush Current
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Overtemperature Protected
  • Low Profile (1mm) ThinSOT™ Package

Product Details

The LTC3406A is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current during operation is only 20µA, dropping to ≤1µA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3406A ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery runtime portable systems. Automatic Burst Mode operation increases efficiency at light loads, further extending battery runtime.

Switching frequency is internally set at 1.5MHz, allowing the use of small surface mount inductors and capacitors. The internal synchronous switch increases efficiency and eliminates the need for an external Schottky diode. Low output voltages are easily supported with the 0.6V feedback reference voltage. The LTC3406A is available in a low profile (1mm) ThinSOT package.

Vout Fsw Features
LTC3406 Adj. 1.5MHz Burst Mode
LTC3406-1.2 1.2V 1.5MHz Burst Mode
LTC3406-1.5 1.5V 1.5MHz Burst Mode
LTC3406-1.8 1.8V 1.5MHz Burst Mode
LTC3406B Adj. 1.5MHz Burst Mode Disabled
LTC3406B-1.2 1.2V 1.5MHz Burst Mode Disabled
LTC3406B-2 Adj. 2.25MHz Burst Mode Disabled
LTC3406A Adj. 1.5MHz Low Rippe Burst Mode
LTC3406AB Adj. 1.5MHz Burst Mode Disabled
LTC3406AB-2 Adj. 2.25MHz Burst Mode Disabled

Applications

  • Cellular Telephones
  • Wireless and DSL Modems
  • Digital Still Cameras
  • Media Players
  • Portable Instruments
  • Point of Load Regulation

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations

LTspice

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.

LTspice

Models for the following parts are available in LTspice:

LTC3406
LTC3406-1
LTC3406-1.2
LTC3406-1.5
LTC3406-1.8
LTC3406A
LTC3406AB
LTC3406B
LTC3406B-1
LTC3406B-1.2
LTC3406B-1.5
LTC3406B-1.8
LTC3406B-2

LTpowerCAD

LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

LTPowerCAD

Design tools for the following parts are available in LTpowerCAD:

LT3406B
LTC3406
LTC3406(INVERTING)
LTC3406-1.2
LTC3406-1.5
LTC3406-1.8
LTC3406A
LTC3406AB
LTC3406B
LTC3406B-2

Product Recommendations

LTC3406A Companion Parts

Recommended Related Parts

Design Resources

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.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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