LTC3406B

PRODUCTION

1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT

Data Sheet Product Selection Table
Viewing:

Overview

  • High Efficiency: Up to 96%
  • 600mA 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
  • Low Quiescent Current: 300µA
  • 0.6V Reference Allows Low Output Voltages
  • Shutdown Mode Draws <1µA Supply Current
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Overtemperature Protected
  • Low Profile (1mm) ThinSOT™ Package

The LTC3406B is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. The device is available in an adjustable version and fixed output voltages of 1.5V and 1.8V. Supply current with no load is 300µA and drops to <1µA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3406B ideally suited for single Li-Ion battery-powered applications. 100% duty cycle provides low dropout operation, extending battery life in portable systems. PWM pulse skipping mode operation provides very low output ripple voltage for noise sensitive applications.

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 LTC3406B is available in a low profile (1mm) ThinSOT package. Refer to LTC3406 for applications that require Burst Mode® operation.

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 Ripple Burst Mode
LTC3406AB Adj. 1.5MHz Burst Mode Disabled
LTC3406AB-2 Adj. 2.25MHz Burst Mode Disabled

Applications

  • Cellular Telephones
  • Personal Information Appliances
  • Wireless and DSL Modems
  • Digital Still Cameras
  • MP3 Players
  • Portable Instruments
LTC3406B
1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT
Figure 1a. High Efficiency Step-Down Converter Figure 1b. Efficiency vs Load Current Product Package 1 Product Package 2
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 2

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts Product Life Cycle Description
LTC3406AB
PRODUCTION 1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT
Modal heading
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

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

LTpowerCAD 1

Design tools for the following parts are available in LTpowerCAD:

  • LTC3406
  • LTC3406-1.2
  • LTC3406-1.5
  • LTC3406-1.8
  • LTC3406B
  • LTC3406B-2
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.

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.

Evaluation Kits

eval board
schematic 1
DC500A-D

LTC3406BES5 Demo Board | 2.7V to 5.5VIN, 1.2VOUT @ 600mA(Max)

Buy Now View Details

Product Details

Demonstration circuit DC500 is a constant-frequency step-down converter, using the various versions (fixed output/adjustable output/Burst Mode/Burst Mode defeated) of the LTC3406 or LTC3406B monolithic synchronous buck regulators. The DC500 has an input voltage range of 2.7V to 5.5V, and is capable of delivering up to 600 mA of output current at minimum input voltage of 3V. The DC500A-D features the adjustable output, LTC3406B (Burst Mode defeated) with the output voltage set to 1.2V.

eval board
schematic 2
DC500A-E

LTC3406BES5-1.5 Demo Board | 2.7V to 5.5VIN, 1.5VOUT @ 600mA(Max)

Buy Now View Details

Product Details

Demonstration circuit DC500 is a constant-frequency step-down converter, using the various versions (fixed output/adjustable output/Burst Mode/Burst Mode defeated) of the LTC3406 or LTC3406B monolithic synchronous buck regulators. The DC500 has an input voltage range of 2.7V to 5.5V, and is capable of delivering up to 600 mA of output current at minimum input voltage of 3V. The DC500A-E features the 1.5V fixed output LTC3406B-1.5 (Burst Mode defeated).

eval board
schematic 3
DC500A-F

LTC3406BES5-1.8 Demo Board | 2.7V to 5.5VIN, 1.8VOUT @ 600mA(Max)

Buy Now View Details

Product Details

Demonstration circuit DC500 is a constant-frequency step-down converter, using the various versions (fixed output/adjustable output/Burst Mode/Burst Mode defeated) of the LTC3406 or LTC3406B monolithic synchronous buck regulators. The DC500 has an input voltage range of 2.7V to 5.5V, and is capable of delivering up to 600 mA of output current at minimum input voltage of 3V. The DC500A-F features the 1.8V fixed output LTC3406B-1.8 (Burst Mode defeated).
DC500A-D
LTC3406BES5 Demo Board | 2.7V to 5.5VIN, 1.2VOUT @ 600mA(Max)
DC500A-A - Schematic
DC500A-E
LTC3406BES5-1.5 Demo Board | 2.7V to 5.5VIN, 1.5VOUT @ 600mA(Max)
DC500A-A - Schematic
DC500A-F
LTC3406BES5-1.8 Demo Board | 2.7V to 5.5VIN, 1.8VOUT @ 600mA(Max)
DC500A-A - Schematic

Latest Discussions

No discussions on LTC3406B yet. Have something to say?

Start a Discussion on EngineerZone®

Recently Viewed