LT8570IMS8E#PBF

Overview

The LT8570IMS8E#PBF is a PWM DC/DC converter from Analog Devices, housed in an MSOP-8 package. It integrates a 0.5A, 65V power switch and supports Boost, SEPIC, and Inverting topologies. The device accepts an input voltage range of 2.55V to 40V, with output voltages adjustable up to 65V. It operates at a switching frequency of 1.5MHz and delivers an output current of 400mA. The static current is 1.2mA, and it functions within a temperature range of -40°C to +125°C.

Feature Summary

• Configurable as a boost, SEPIC, or inverting converter for versatile power conversion needs.
• Integrates a high-voltage 65V power switch capable of handling significant voltage differentials.
• Supports wide input voltage ranges suitable for various battery and rail applications.

Applications

• Inverting converters accepting 5V to 35V input to generate negative outputs
• Charge pump applications creating dual polarity voltages from single lithium-ion batteries
• Boost converters generating higher voltages from lower input sources

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence. Confirm the MSOP-8 package type matches your PCB footprint requirements. Ensure the 1.5MHz switching frequency aligns with your EMI constraints and inductor selection. Check for any recent Product Change Notifications (PCN) that might affect pinout or electrical characteristics before finalizing the design.

Selection Notes

Select this component when a flexible topology is required alongside a robust 65V switch rating. The 0.5A internal switch current limit suits moderate load applications. Consider the 1.5MHz frequency for smaller passive components compared to lower-frequency alternatives. Verify that the 400mA output current capability meets the system's peak demand under all operating conditions.

Part Context

This part belongs to the LT8570 family of PWM DC/DC converters. The IMS8E designation specifies the industrial temperature grade and MSOP-8 package. It shares core architecture with other variants like LT8570EDD-1 but differs in package and thermal performance. The family is designed for applications requiring configurable power stages without external MOSFETs.

Replacement Considerations

LT8570HMS8E#PBF offers similar functionality with potentially different thermal or packaging nuances. LT8570EMS8E-1 provides a reduced 0.25A switch current, suitable for lighter loads. Direct substitution requires verifying pin compatibility and ensuring the alternative meets the specific voltage and current requirements of the existing circuit design.