LT3668EMSE#TRPBF

Overview

The LT3668EMSE#TRPBF is a power management integrated circuit featuring one synchronous buck converter and two low-dropout linear regulators. It operates from an input voltage range of 1.6V to 40V. The buck output provides adjustable voltage up to 39.4V with a maximum current of 400mA. Each LDO output supports adjustable voltages up to 10V with 200mA capability. The device integrates a switching frequency range of 250kHz to 2.2MHz and functions within a temperature range of -40°C to +150°C in a 16-lead MSOP package with an exposed pad.

Feature Summary

• Integrates a high-efficiency synchronous step-down DC/DC converter alongside two precision low-dropout linear regulators for combined switching and LDO power delivery.
• Supports wide input voltage operation from 1.6V to 40V, accommodating various supply sources including battery and bus architectures.
• Features adjustable switching frequencies ranging from 250kHz to 2.2MHz to optimize efficiency and external component size based on application requirements.

Applications

• Portable electronic devices requiring mixed switching and linear regulation
• Industrial control systems with wide input voltage ranges
• Battery-powered equipment needing efficient power management

Procurement Notes

Verify the specific suffix TRPBF indicates tape-and-reel packaging when ordering. Confirm the MSOP-EP package variant matches your PCB footprint design. Ensure the operating temperature range meets your environmental specifications. Cross-reference the manufacturer datasheet for exact electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a single IC solution is needed to provide both switched and regulated linear outputs. The wide input range suits applications powered by varying sources. Consider the thermal performance of the exposed pad package for heat dissipation needs. Verify that the required output currents fit within the 400mA buck and 200mA LDO limits.

Part Context

This part belongs to the LT3668 family of multi-output power management ICs. It combines a synchronous buck converter with dual LDOs to simplify board space and component count. The series targets applications requiring multiple regulated rails from a single input source efficiently.

FAQ

What is the maximum output current for the linear regulator sections?

Each of the two low-dropout linear regulator outputs can deliver up to 200mA.

Does the device support adjustable switching frequencies?

Yes, the internal oscillator frequency can be adjusted between 250kHz and 2.2MHz using an external resistor.