LT3500IDD#PBF

Voltage Regulators - Linear + Switching Overview

The LT3500IDD#PBF is a monolithic power management integrated circuit featuring a synchronous 2A step-down switching regulator and an integrated linear regulator. It operates with an input voltage range of 3V to 36V and delivers a fixed 0.8V output from the buck converter, while the linear regulator provides adjustable output capability. The device utilizes a 12-lead DFN package with an exposed thermal pad for efficient heat dissipation. Designed for automotive applications, it supports a wide operating temperature range from -40°C to +150°C. The internal switch frequency is set at 2.2MHz, enabling the use of small external components.

Voltage Regulators - Linear + Switching Feature Summary

• Integrates a high-efficiency synchronous buck converter with a dedicated linear regulator in a single compact package
• Supports extended input voltage ranges up to 36V suitable for automotive load dump conditions
• Includes comprehensive protection features such as thermal shutdown and current limiting

Voltage Regulators - Linear + Switching Applications

• Automotive electronic systems requiring robust power regulation under varying line conditions
• Industrial control modules needing isolated or auxiliary power rails
• Embedded systems utilizing multiple voltage domains from a single high-voltage source

Voltage Regulators - Linear + Switching Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and temperature grade specifications. Confirm that the requested part number matches the exact pinout and thermal requirements of the target design. Cross-reference the datasheet revision date to ensure compatibility with current manufacturing standards. Ensure all electrical parameters align with the system's input and output constraints before finalizing procurement orders.

Voltage Regulators - Linear + Switching Selection Notes

Select this component when a design requires both a high-current switching rail and a low-noise linear supply within a constrained board area. Evaluate the thermal performance based on the expected ambient temperature and load current to determine if additional heatsinking is necessary. Consider the 2.2MHz switching frequency impact on electromagnetic interference and filter component selection. Verify that the input voltage profile remains within the specified operational limits during all transient conditions.

Voltage Regulators - Linear + Switching Part Context

This device belongs to the LT3500 family of mixed-signal power management ICs designed for demanding environments. It combines the efficiency of synchronous rectification with the simplicity of a linear regulator. The family targets applications where space is limited but high reliability is required. Other variants in the series may offer different output configurations or current ratings while maintaining similar architectural principles.

Voltage Regulators - Linear + Switching Replacement Considerations

LT3500HDD#TRPBF serves as a tape-and-reel alternative offering identical electrical characteristics and functionality. Both parts share the same core architecture and pin configuration, facilitating direct substitution in designs where reel packaging is preferred over tube packaging.