LINEAR 2-Phase Boost Converter Delivers 10W from a 3mm × 3mm DFN Package Design Note 354 handbook

About this manual

This document is a design note (DN354) for the Linear Technology LTC3428, a dual-phase boost converter designed for battery-powered and point-of-load applications. It emphasizes features such as small size, high efficiency, low noise, and simplicity with minimal component count.

The LTC3428 incorporates two internal N-channel MOSFET switches to supply up to 2A of current at 5V from a 3.3V input. Its dual-phase architecture operates effectively at 2MHz (1MHz per phase), which minimizes inductor and capacitor size while reducing output ripple to as little as 20mVp-p.

What's inside

• Introduction
• Dual Phase Converter Reduces Output Ripple
• Smaller Layout is Possible by Reducing the Number of External Components
• Antiringing Feature in Discontinuous Operation
• Conclusion

Frequently asked questions

What is the maximum output current and voltage for this converter?

The LTC3428 can supply up to 2A of current at an output voltage of 5V.

What is the minimum input voltage required to start up this device?

The converter can start up with an input voltage as low as 1.5V.

What is the physical footprint size of this component?

The device has a footprint measuring 3mm x 3mm.