LT3505IMS8E#PBF

Overview

The LT3505IMS8E#PBF is a current mode PWM step-down DC/DC converter manufactured by Analog Devices Inc. It features an internal 1.4A power switch and supports a wide operating input voltage range of 3.6V to 36V, with a maximum rating of 40V. The device provides a single adjustable output voltage ranging from 0.78V to 33.84V, delivering up to 1.2A of output current. It utilizes a resistor-programmable switching frequency between 200kHz and 3MHz. The component operates within a temperature range of -40°C to 125°C and is housed in a thermally enhanced 8-pin MSOP EP package.

Feature Summary

• Integrates a 1.4A power switch for high-current step-down conversion
• Supports wide input voltage ranges suitable for automotive and industrial sources
• Features low shutdown current below 2µA for efficient battery management
• Includes cycle-by-cycle current limit and soft-start protection mechanisms

Applications

• Regulating power from unregulated wall transformers
• Power supply conditioning for 24V industrial systems
• Automotive battery voltage regulation
• General-purpose buck converter designs requiring compact footprint

Procurement Notes

Verify the specific suffix 'IMS8E' against the manufacturer's official documentation to confirm the exact package type and thermal pad configuration. Ensure that the '#PBF' designation aligns with current RoHS compliance requirements as stated in the datasheet. Cross-reference the part number with authorized distributors to confirm availability status, as supply chain conditions may vary. Confirm that the intended application environment falls within the specified industrial temperature grade limits.

Selection Notes

Select this component when designing systems requiring a robust buck converter with a wide input voltage range up to 36V. The internal 1.4A switch capability allows for handling peak loads while maintaining efficiency. Consider the programmable switching frequency feature to optimize external component size versus electromagnetic interference performance. The low quiescent current in shutdown mode makes it suitable for applications requiring strict power management during standby states.

Part Context

The LT3505 belongs to the Linear Technology (now Analog Devices) family of high-performance switching regulators. This series is designed for applications demanding reliable power conversion from diverse source voltages. The IMS8E package variant specifically refers to the MSOP form factor with an exposed pad for improved thermal dissipation, distinguishing it from other pinout or package options within the broader LT3505 product line.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with direct replacements only through official Analog Devices cross-reference tools.