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

LTC3529 - 1.5A, 1.5MHz Step-Up DC/DC Converter in 2mm × 3mm DFN

LTC3422 - 1.5A, 3MHz Synchronous Step-Up DC/DC Converter with Output Disconnect

Features

  • 700mA Continuous/1A Pulsed Output Current for Li-Ion to 5V Applications
  • Synchronous Rectification: Up to 96% Efficiency
  • True Output Disconnect
  • Inrush Current Limiting
  • Adjustable Automatic Burst Mode® Operation
  • Low Noise, Fixed Frequency Operation from 100kHz to 3MHz
  • 0.5V to 4.5V Input Range
  • 2.25V to 5.25V Adjustable Output Voltage
  • Guaranteed 1V Start-Up
  • Programmable Soft-Start
  • Synchronizable Oscillator
  • Low Quiescent Current: 25μA
  • <1μA Shutdown Current
  • Anti-Ringing Control
  • Small (3mm × 3mm × 0.75mm) Thermally Enhanced 10-Pin DFN Package

Typical Application

LTC3422 Typical Application
LTC3422 Typical Application

Description

The LTC3422 is a high efficiency, current mode, fixed frequency, step-up DC/DC converter with true output disconnect and inrush current limiting. The part is guaranteed to start up from an input voltage of 1V. The device includes a 0.20Ω N-channel MOSFET switch and a 0.24Ω P-channel MOSFET synchronous rectifier. The output voltage, switching frequency, soft-start time, Burst Mode threshold and loop compensation are all simply programmed using tiny external passive components.

Quiescent current is only 25μA during Burst Mode operation, maximizing battery life in portable applications. The oscillator frequency can be programmed up to 3MHz and can be synchronized to an external clock applied to the SYNC pin.

Other features include 1μA shutdown, short-circuit protection, anti-ringing control, thermal shutdown and current limit. The LTC3422 is available in a (3mm × 3mm × 0.75mm) 10-pin DFN package.

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
LTC3422EDD#PBF 3x3 DFN-10 DD E 05-08-1699 Yes
LTC3422EDD#TRPBF 3x3 DFN-10 DD E 05-08-1699 Yes


LTC3422 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
LTC3422EDD#PBF 3x3 DFN-10 E $4.21 $2.95 Yes
LTC3422EDD#TRPBF 3x3 DFN-10 E $3.05 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
DC860A LTC3422EDD Demo Board | 1.8V ≤ VIN ≤ 3V, Vout = 3.3V @ 600mA (max) $100.00
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Click here to view our complete list of demo boards

Applications

  • Wireless Handsets
  • Handheld Computers
  • GPS Receivers
  • MP3 Players

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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:
LTC3422

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