Power Management Switching Regulator Step-Down (Buck) Regulators Micropower Buck
Power Management Switching Regulator Step-Down (Buck) Regulators Internal Power Switch Buck
Power Management Switching Regulator Step-Down (Buck) Regulators High Input Voltage Buck

LT3470 - Micropower Buck Regulator with Integrated Boost and Catch Diodes

Features

  • Low Quiescent Current: 26µA at 12VIN to 3.3VOUT
  • Integrated Boost and Catch Diodes
  • Input Range: 4V to 40V
  • Low Output Ripple: <10mV
  • <1µA in Shutdown Mode
  • Output Voltage: 1.25V to 16V
  • 200mA Output Current
  • Hysteretic Mode Control
    – Low Ripple Burst Mode® Operation at Light Loads
    – Continuous Operation at Higher Loads
  • Solution Size as Small as 50mm2
  • Low Profile (0.75mm) 3mm x 2mm Thermally Enhanced 8-Lead DD and 1mm ThinSOT Packages

Typical Application

LT3470 Typical Application
LT3470 Typical Application

Description

The LT3470 is a micropower step-down DC/DC converter that integrates a 300mA power switch, catch diode and boost diode into low profile 3mm x 2mm DD and ThinSOT packages. The LT3470 combines Burst Mode and continuous operation to allow the use of tiny inductor and capacitors while providing a low ripple output to loads of up to 200mA.

With its wide input range of 4V to 40V, the LT3470 can regulate a wide variety of power sources, from 2-cell Li-Ion batteries to unregulated wall transformers and leadacid batteries. Quiescent current in regulation is just 26µA in a typical application while a zero current shutdown mode disconnects the load from the input source, simplifying power management in battery-powered systems. Fast current limiting and hysteretic control protects the LT3470 and external components against shorted outputs, even at 40V input.

Packaging

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

ThinSOT, DFN-8

LT3470 Package Drawing
LT3470 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT3470AEDDB#PBF DFN 8 E $3.51 View
LT3470AEDDB#TRMPBF DFN 8 E $3.51 $2.51 View
LT3470AEDDB#TRPBF DFN 8 E $3.51 $2.46 View
LT3470AHDDB#TRMPBF DFN 8 H $4.49 $3.22 View
LT3470AHDDB#TRPBF DFN 8 H $4.49 $3.17 View
LT3470AIDDB#PBF DFN 8 I $4.04 View
LT3470AIDDB#TRMPBF DFN 8 I $4.04 $2.98 View
LT3470AIDDB#TRPBF DFN 8 I $4.04 $2.92 View
LT3470EDDB DFN 8 E $2.80 View
LT3470EDDB#PBF DFN 8 E $2.80 View
LT3470EDDB#TR DFN 8 E $2.80 $2.36 View
LT3470EDDB#TRM DFN 8 E $2.80 $2.38 View
LT3470EDDB#TRMPBF DFN 8 E $2.80 $2.38 View
LT3470EDDB#TRPBF DFN 8 E $2.80 $2.36 View
LT3470ETS8 SOT 8 E $2.80 View
LT3470ETS8#PBF SOT 8 E $2.80 View
LT3470ETS8#TR SOT 8 E $2.80 $2.36 View
LT3470ETS8#TRM SOT 8 E $2.80 $2.38 View
LT3470ETS8#TRMPBF SOT 8 E $2.80 $2.38 View
LT3470ETS8#TRPBF SOT 8 E $2.80 $2.36 View
LT3470HDDB#PBF DFN 8 H $4.39 View
LT3470HDDB#TRMPBF DFN 8 H $4.39 $3.12 View
LT3470HDDB#TRPBF DFN 8 H $4.39 $3.07 View
LT3470HTS8#PBF SOT 8 H $4.39 View
LT3470HTS8#TRMPBF SOT 8 H $4.39 $3.12 View
LT3470HTS8#TRPBF SOT 8 H $4.39 $3.07 View
LT3470IDDB DFN 8 I $3.34 View
LT3470IDDB#PBF DFN 8 I $3.34 View
LT3470IDDB#TR DFN 8 I $3.34 $2.82 View
LT3470IDDB#TRM DFN 8 I $3.34 $2.84 View
LT3470IDDB#TRMPBF DFN 8 I $3.34 $2.84 View
LT3470IDDB#TRPBF DFN 8 I $3.34 $2.82 View
LT3470ITS8 SOT 8 I $3.34 View
LT3470ITS8#PBF SOT 8 I $3.34 View
LT3470ITS8#TR SOT 8 I $3.34 $2.82 View
LT3470ITS8#TRM SOT 8 I $3.34 $2.84 View
LT3470ITS8#TRMPBF SOT 8 I $3.34 $2.84 View
LT3470ITS8#TRPBF SOT 8 I $3.34 $2.82 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
DC1037A LT3470EDDB | Micropower Buck Reg w/ Integrated Boost & Catch Diodes $75.00
DC716B LT3470ETS8 Demo Board | 40V Micropower SOT-23 Buck Regulator with Integrated Boost and Catch Diodes, VIN = 5.5V - 40V, VOUT = 5V @ 200mA $75.00
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Click here to view our complete list of demo boards

Applications

  • Automotive Battery Regulation
  • Power for Portable Products
  • Distributed Supply Regulation
  • Industrial Supplies
  • Wall Transformer Regulation

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
LT3470
LT3470A

Technical Support