Power Management Switching Regulator Step-Up (Boost) Regulators Internal Power Switch Boost

LTC3426 - 1.2MHz Step-Up DC/DC Converter in SOT-23

Features

  • Internal 2A MOSFET Switch
  • 1.2MHz Switching Frequency
  • Integrated Soft-Start
  • Low 1.6V VIN Operation
  • Low RDS(ON) Switch: 100mΩ at 5V Output
  • Delivers 5V at 800mA from a 3.3V Input
  • Delivers 3.3V at 800mA from a 2.5V Input
  • Uses Small, Low Profile External Components
  • Low Profile (1mm) SOT-23 (ThinSOTTM) Package

Typical Application

LTC3426 Typical Application
LTC3426 Typical Application

Description

The LTC3426 step-up switching regulator generates an output voltage of up to 5.5V from an input voltage as low as 1.6V. Ideal for applications where space is limited, it switches at 1.2MHz, allowing the use of tiny, low cost and low profile external components. Its internal 2A, 100mΩ NMOS switch provides high efficiency even at heavy load, while the constant frequency, current mode architecture results in low, predictable output noise that is easy to filter.

Anti-ringing circuitry reduces EMI concerns by damping the inductor while in discontinuous mode, and internal soft-start eases inrush current worries. Internal frequency compensation is designed to accommodate ceramic output capacitors, further reducing noise. The device features very low shutdown current of 0.5µA.

The LTC3426 is available in the 6-lead SOT-23 package.

Protected by U.S. Patents, including 6498466, 6611131

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
LTC3426ES6#PBF SOT-23 S6 E 05-08-1636 Yes
LTC3426ES6#TRMPBF SOT-23 S6 E 05-08-1636 Yes
LTC3426ES6#TRPBF SOT-23 S6 E 05-08-1636 Yes


LTC3426 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
LTC3426ES6#PBF SOT-23 E $2.14 Yes
LTC3426ES6#TRMPBF SOT-23 E $2.14 $1.83 Yes
LTC3426ES6#TRPBF SOT-23 E $2.14 $1.81 Yes
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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 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
DC692A LTC3426ES6 Demo Board | 1.2MHz, Vin=1.8V to 4.2V, Vout=5V@400mA-800mA $75.00
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Click here to view our complete list of demo boards

Applications

  • White LED Driver Supply
  • Local 3.3V or 5V Supply
  • Battery Back-Up

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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

Models for the following parts are available in LTspice:
LTC3426

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