Features and Benefits
- 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
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.
- Wireless Handsets
- Handheld Computers
- GPS Receivers
- MP3 Players
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Demonstration circuit 860 is a 1.5A, 1MHz synchronous boost converter featuring the LTC3422EDD, which features true output disconnect in shutdown. The demo board produces 3.3V at 600mA (max) from a 1.8V to 3V input voltage range.
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
LTC3422 Companion Parts
Recommended Related Parts
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.