Power Management Switching Regulator Step-Down (Buck) Regulators Internal Power Switch Buck

For New Designs

LTC3406AB - 1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT

LTC3406B - 1.5MHz, 600mA Synchronous Step-Down Regulator in ThinSOT

Features

  • 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

Typical Application

LTC3406B Typical Application
LTC3406B Typical Application

Description

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.

Protected by U.S. Patents, including 6580258, 5481178.

Packaging

For complete and up to date package information and drawings, please refer to our packaging page

ThinSOT

LTC3406B Package Drawing
LTC3406B Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTC3406ABES5#TRMPBF SOT 5 E $2.61 $1.88 View
LTC3406ABES5#TRPBF SOT 5 E $2.61 $1.83 View
LTC3406ABES5-2#TRMPBF SOT 5 E $2.61 $1.88 View
LTC3406ABES5-2#TRPBF SOT 5 E $2.61 $1.83 View
LTC3406AES5#TRMPBF SOT 5 E $2.61 $1.88 View
LTC3406AES5#TRPBF SOT 5 E $2.61 $1.83 View
LTC3406AIS5#PBF SOT 5 I $3.00 View
LTC3406AIS5#TRMPBF SOT 5 I $3.00 $2.15 View
LTC3406AIS5#TRPBF SOT 5 I $3.00 $2.10 View
LTC3406B-2ES5 SOT 5 E $3.07 View
LTC3406B-2ES5#TR SOT 5 E $3.07 $2.16 View
LTC3406B-2ES5#TRM SOT 5 E $3.07 $2.18 View
LTC3406B-2ES5#TRMPBF SOT 5 E $3.07 $2.18 View
LTC3406B-2ES5#TRPBF SOT 5 E $3.07 $2.16 View
LTC3406BES5 SOT 5 E $2.86 View
LTC3406BES5#TR SOT 5 E $2.86 $2.01 View
LTC3406BES5#TRM SOT 5 E $2.86 $2.03 View
LTC3406BES5#TRMPBF SOT 5 E $2.86 $2.03 View
LTC3406BES5#TRPBF SOT 5 E $2.86 $2.01 View
LTC3406BES5-1.2 SOT 5 E $2.86 View
LTC3406BES5-1.2#TR SOT 5 E $2.86 $2.01 View
LTC3406BES5-1.2#TRM SOT 5 E $2.86 $2.03 View
LTC3406BES5-1.2#TRMPBF SOT 5 E $2.86 $2.03 View
LTC3406BES5-1.2#TRPBF SOT 5 E $2.86 $2.01 View
LTC3406BES5-1.5 SOT 5 E $2.86 View
LTC3406BES5-1.5#TR SOT 5 E $2.86 $2.01 View
LTC3406BES5-1.5#TRM SOT 5 E $2.86 $2.03 View
LTC3406BES5-1.5#TRMPBF SOT 5 E $2.86 $2.03 View
LTC3406BES5-1.5#TRPBF SOT 5 E $2.86 $2.01 View
LTC3406BES5-1.8 SOT 5 E $2.86 View
LTC3406BES5-1.8#TR SOT 5 E $2.86 $2.01 View
LTC3406BES5-1.8#TRM SOT 5 E $2.86 $2.03 View
LTC3406BES5-1.8#TRMPBF SOT 5 E $2.86 $2.03 View
LTC3406BES5-1.8#TRPBF SOT 5 E $2.86 $2.01 View
LTC3406ES5 SOT 5 E $2.86 View
LTC3406ES5#PBF SOT 4 E $2.86 View
LTC3406ES5#TR SOT 5 E $2.86 $2.01 View
LTC3406ES5#TRM SOT 5 E $2.86 $2.03 View
LTC3406ES5#TRMPBF SOT 5 E $2.86 $2.03 View
LTC3406ES5#TRPBF SOT 5 E $2.86 $2.01 View
LTC3406ES5-1.2 SOT 5 E $2.86 View
LTC3406ES5-1.2#TR SOT 5 E $2.86 $2.01 View
LTC3406ES5-1.2#TRM SOT 5 E $2.86 $2.03 View
LTC3406ES5-1.2#TRMPBF SOT 5 E $2.86 $2.03 View
LTC3406ES5-1.2#TRPBF SOT 5 E $2.86 $2.01 View
LTC3406ES5-1.5 SOT 5 E $2.86 View
LTC3406ES5-1.5#TR SOT 5 E $2.86 $2.01 View
LTC3406ES5-1.5#TRM SOT 5 E $2.86 $2.03 View
LTC3406ES5-1.5#TRMPBF SOT 5 E $2.86 $2.03 View
LTC3406ES5-1.5#TRPBF SOT 5 E $2.86 $2.01 View
LTC3406ES5-1.8 SOT 5 E $2.86 View
LTC3406ES5-1.8#TR SOT 5 E $2.86 $2.01 View
LTC3406ES5-1.8#TRM SOT 5 E $2.86 $2.03 View
LTC3406ES5-1.8#TRMPBF SOT 5 E $2.86 $2.03 View
LTC3406ES5-1.8#TRPBF SOT 5 E $2.86 $2.01 View
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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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology demo boards are offered free of charge to qualified customers. Contact your local sales office or distributor to request a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC500A-D LTC3406BES5 | High Efficiency Thin SOT Synchronous Buck Regulator, 2.7 to 5.5 Vin, 1.2Vout @ 600mA(max) $75.00
DC500A-E LTC3406BES5-1.5 | High Efficiency Thin SOT Synchronous Buck Regulator, 2.7 to 5.5 Vin, 1.5Vout @ 600mA(max) $75.00
DC500A-F LTC3406BES5-1.8 | High Efficiency Thin SOT Synchronous Buck Regulator, 2.7 to 5.5 Vin, 1.8Vout @ 600mA(max) $75.00
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Click here to view our complete list of demo boards

Applications

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

Simulate

LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice IV does not automatically open after clicking the link above, 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

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Related models available in LTspice IV
LTC3406-1.2
LTC3406-1.5
LTC3406-1.8
LTC3406
LTC3406A
LTC3406AB
LTC3406B-1.2
LTC3406B-1.5
LTC3406B-1.8
LTC3406B-2
LTC3406B

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