LT3500HMSE#PBF

Overview

The LT3500HMSE#PBF is a monolithic switching regulator manufactured by Analog Devices Inc., housed in a 16-lead MSOP package. It integrates a 2A synchronous buck converter with an adjustable output voltage range and a separate linear regulator or controller output. The device supports an input voltage range from 3V to 36V, operates at a fixed switching frequency of 2.2MHz, and features a typical quiescent current of 2.5mA. It includes thermal shutdown protection and is rated for operation between -40°C and +150°C.

Feature Summary

• Integrates a high-efficiency 2A synchronous step-down DC-to-DC converter with an internal power switch.
• Includes a secondary low-noise linear regulator or controller output for auxiliary biasing requirements.
• Features a wide 3V to 36V input voltage range suitable for various industrial and automotive supply rails.
• Provides thermal shutdown protection to safeguard the device during overload or excessive temperature conditions.

Applications

• Industrial control systems requiring multiple regulated voltage rails from a single source.
• Automotive electronics operating within standard 12V or 24V electrical architectures.
• Embedded systems needing compact power solutions with integrated noise filtering capabilities.

Procurement Notes

Verify the specific suffix 'HMSE' against the manufacturer's official datasheet to confirm the exact temperature grade and package variant. Ensure that the '#PBF' designation aligns with your assembly process requirements regarding lead-free compliance. Cross-reference the pinout diagram with your PCB layout to guarantee correct orientation and thermal pad connection.

Selection Notes

Select this component when a combined buck and linear regulation solution is required in a small footprint. Consider the 2.2MHz switching frequency for minimizing external passive component sizes compared to lower-frequency alternatives. Evaluate the thermal performance in your specific enclosure environment due to the high integration density and potential heat dissipation needs.

Part Context

This part belongs to the LT3500 series of mixed-signal power management ICs designed for space-constrained applications. It differs from other regulators by combining two distinct conversion topologies in one package. The series is targeted at designs where board area is limited but multiple voltage levels are necessary for logic and analog circuits.

Replacement Considerations

LT3500IDD#PBF

FAQ

What is the maximum continuous output current for the buck converter section?

The integrated synchronous buck converter provides a maximum continuous output current of 2A.

Does the device support external synchronization of the switching frequency?

No, the LT3500 operates at a fixed internal switching frequency of 2.2MHz and does not support external clock synchronization.