LTC3406B-1.2

PRODUCTION

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

Data Sheet Product Selection Table
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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 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-1.2 is a high efficiency monolithic synchronous buck regulator using a constant frequency, current mode architecture. Supply current with no load is 300µA dropping to <1µA in shutdown. The 2.5V to 5.5V input voltage range makes the LTC3406B-1.2 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. The LTC3406B-1.2 is available in a low profile (1mm) ThinSOT package.

Protected by U.S. Patents including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131.

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-1.2
1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT
High Efficiency Step-Down Converter Efficiency and Power Loss Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

Data Sheet

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Software Resources

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Hardware Ecosystem

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Tools & Simulations

LTspice

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

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.

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