LT3500IMSE#PBF

Overview

The LT3500IMSE#PBF is a monolithic power management IC from Analog Devices, integrating a synchronous 2A step-down switching regulator with an adjustable linear regulator and controller. It operates within a wide input voltage range of 3V to 36V and supports output currents up to 2A for the buck converter. The device utilizes a high-frequency switching topology at 2.2MHz to minimize external component size. It features a low quiescent current of 2.5mA and includes shutdown functionality. The component is housed in a compact DFN-12 package and is rated for industrial temperatures ranging from -40°C to +150°C.

Feature Summary

• Integrates a synchronous 2A buck converter with an adjustable linear regulator and controller on a single chip
• Supports a wide input voltage range from 3V to 36V for flexible power supply designs
• Features a high 2.2MHz switching frequency to reduce passive component footprint
• Includes a shutdown pin for system power management and low standby current consumption

Applications

• Automotive electronics requiring robust power regulation across varying battery voltages
• Industrial control systems needing isolated or multi-rail power distribution
• Portable equipment utilizing wide-input DC-DC conversion
• Embedded systems requiring combined switching and linear regulation capabilities

Procurement Notes

Verify the specific suffix 'IMSE' corresponds to the MSOP-16 EP package and industrial temperature grade (-40°C to +125°C) rather than the extended grade found in other variants like 'HDD'. Confirm RoHS compliance status via the manufacturer's official documentation before finalizing procurement orders. Ensure the '#PBF' designation indicates lead-free tin plating as per standard Analog Devices specifications.

Selection Notes

Select this component when a design requires both high-current switching regulation and a clean linear output from a single IC footprint. The 2.2MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Consider the thermal performance of the MSOP-16 EP package for heat dissipation requirements. Verify that the input voltage range of 3V to 36V aligns with the system's power source characteristics.

Part Context

The LT3500 belongs to Analog Devices' family of mixed-mode power management ICs designed to simplify board space-constrained applications. Unlike discrete solutions, it combines the efficiency of a synchronous buck converter with the noise benefits of a linear regulator. This integration reduces component count and assembly complexity while maintaining high reliability standards typical of automotive-grade power management components.

Replacement Considerations

LT3500EMSE#PBF: Identical functional specification but packaged in MSOP-16 EP instead of DFN-12; verify pinout compatibility.

FAQ

What is the maximum output current capability of the integrated buck converter?

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

Does the LT3500 support simultaneous operation of both regulators?

Yes, the device integrates both a 2A step-down switching regulator and an adjustable linear regulator/controller that can operate concurrently.

What is the operating temperature range for the IMSE variant?

The LT3500IMSE#PBF is rated for an operating junction temperature range from -40°C to +125°C.