Features and Benefits
- 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
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
- White LED Driver Supply
- Local 3.3V or 5V Supply
- Battery Back-Up
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 692 is a high efficiency 1.2MHz boost DC/DC converter featuring the LTC3426ES6. The board is capable of supplying 5V at 400mA from 1.8V to input. It can deliver 5V at 800mA from a 3.3V input. The converter has internal soft start and internal frequency compensation features.
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:
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.