LT3467 - 1.1A Step-Up DC/DC Converter with Integrated Soft-Start

Features

  • 1.3MHz Switching Frequency (LT3467)
  • 2.1MHz Switching Frequency (LT3467A)
  • Low VCESAT Switch: 330mV at 1.1A
  • High Output Voltage: Up to 40V
  • Wide Input Range: 2.4V to 16V
  • Dedicated Soft-Start Pin
  • 5V at 540mA from 3.3V Input (LT3467)
  • 5V at 430mA from 3.3V Input (LT3467A)
  • 12V at 270mA from 5V Input (LT3467)
  • 12V at 260mA from 5V Input (LT3467A)
  • Uses Small Surface Mount Components
  • Low Shutdown Current: <1μA
  • Pin-for-Pin Compatible with the LT1930 and LT1613
  • Low Profile (1mm) ThinSOT™ Package
  • Low Profile (0.75mm) 8-Lead (3mm × 2mm) DFN Package
Designed for Automotive and Transportation Applications
AEC-Q100 generic family data available for specific packages


Typical Application

LT3467 Typical Application
LT3467 Typical Application

Description

The LT3467/LT3467A switching regulators combine a 42V, 1.1A switch with a soft-start function. Pin compatible with the LT1930, its low VCESAT bipolar switch enables the device to deliver high current outputs in a small footprint. The LT3467 switches at 1.3MHz, allowing the use of tiny, low cost and low height inductors and capacitors. The LT3467A switches at 2.1MHz, allowing the use of even smaller components. High inrush current at start-up is eliminated using the programmable soft-start function. A single external capacitor sets the current ramp rate. A constant frequency current mode PWM architecture results in low, predictable output noise that is easy to filter.

The high voltage switch on the LT3467/LT3467A is rated at 42V, making the devices ideal for boost converters up to 40V as well as SEPIC and flyback designs. The LT3467 can generate 5V at up to 540mA from a 3.3V supply or 5V at 450mA from four alkaline cells in a SEPIC design. The LT3467A can generate 5V at up to 430mA from a 3.3V supply or 15V at 135mA from a 3.3V supply. The LT3467/ LT3467A are available in a low profile (1mm) 6-lead SOT-23 package and tiny 3mm × 2mm DFN package.

  Switching Frequency
LT3467 1.3MHz
LT3467A 2.1MHz

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

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

Part Number Package Code Temp Package
Drawing
RoHS
LT3467EDDB#PBF 3x2 DFN-8 DDB E 05-08-1702 Yes
LT3467EDDB#TRMPBF 3x2 DFN-8 DDB E 05-08-1702 Yes
LT3467EDDB#TRPBF 3x2 DFN-8 DDB E 05-08-1702 Yes
LT3467ES6#PBF SOT-23 S6 E 05-08-1636 Yes
LT3467ES6#TRMPBF SOT-23 S6 E 05-08-1636 Yes
LT3467ES6#TRPBF SOT-23 S6 E 05-08-1636 Yes
LT3467IDDB#PBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LT3467IDDB#TRMPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LT3467IDDB#TRPBF 3x2 DFN-8 DDB I 05-08-1702 Yes
LT3467IS6#PBF SOT-23 S6 I 05-08-1636 Yes
LT3467IS6#TRMPBF SOT-23 S6 I 05-08-1636 Yes
LT3467IS6#TRPBF SOT-23 S6 I 05-08-1636 Yes


LT3467 Package Drawing
LT3467 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT3467EDDB#PBF 3x2 DFN-8 E $2.57 Yes
LT3467EDDB#TRMPBF 3x2 DFN-8 E $2.57 $1.83 Yes
LT3467EDDB#TRPBF 3x2 DFN-8 E $2.57 $1.81 Yes
LT3467ES6#PBF SOT-23 E $2.57 Yes
LT3467ES6#TRMPBF SOT-23 E $2.57 $1.83 Yes
LT3467ES6#TRPBF SOT-23 E $2.57 $1.81 Yes
LT3467IDDB#PBF 3x2 DFN-8 I $2.97 Yes
LT3467IDDB#TRMPBF 3x2 DFN-8 I $2.97 $2.13 Yes
LT3467IDDB#TRPBF 3x2 DFN-8 I $2.97 $2.08 Yes
LT3467IS6#PBF SOT-23 I $3.10 Yes
LT3467IS6#TRMPBF SOT-23 I $3.10 $2.22 Yes
LT3467IS6#TRPBF SOT-23 I $3.10 $2.17 Yes
Buy NowRequest Samples
* 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 offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about 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
DC647A LT3467ES6 | 1.2MHz, SOT-23 DC/DC Converter, 2 Circuits; Boost and SEPIC $75.00
Buy Now
Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

Please contact your local sales representative for more information regarding reliability reports and AEC-Q100 data or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT3467IDDB#PBF 3x2 DFN-8 I $2.97 Yes
LT3467IDDB#TRMPBF 3x2 DFN-8 I $2.97 $2.13 Yes
LT3467IDDB#TRPBF 3x2 DFN-8 I $2.97 $2.08 Yes
LT3467IS6#PBF SOT-23 I $3.10 Yes
LT3467IS6#TRMPBF SOT-23 I $3.10 $2.22 Yes
LT3467IS6#TRPBF SOT-23 I $3.10 $2.17 Yes
Buy NowRequest Samples
* 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.

Applications

  • Digital Cameras
  • White LED Power Supplies
  • Cellular Phones
  • Medical Diagnostic Equipment
  • Local 5V or 12V Supplies
  • TFT-LCD Bias Supplies
  • xDSL Power Supplies

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

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
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice 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.

Models for the following parts are available in LTspice:
LT3467
LT3467A

Technical Support