LT3507AIUHF#PBF

Overview

The LT3507AIUHF#PBF is a high-efficiency switching regulator featuring three independent buck converters and one low-dropout linear regulator. It operates with an input voltage range of 4V to 36V and supports adjustable output voltages from 0.8V to 32.4V. The primary buck channel delivers up to 2.7A, while the secondary channels provide 1.8A each. Integrated into a 38-lead QFN package, it functions at switch frequencies between 900kHz and 1.1MHz. Designed for automotive applications, it ensures reliable performance across a temperature range of -40°C to 150°C.

Feature Summary

• Integrates three synchronous buck regulators and one LDO in a single compact package
• Features integrated power sequencing logic to simplify multi-rail supply design
• Supports ceramic output capacitors to reduce overall system component count and cost
• Includes dedicated pins for independent tracking, soft-start control, and power-good indication

Applications

• Automotive electronic systems requiring robust multi-voltage regulation
• Industrial control units with distributed power architecture needs
• Communication infrastructure equipment managing multiple signal rails
• Complex embedded systems utilizing synchronized power sequencing

Procurement Notes

Verify the specific suffix 'IUHF' corresponds to the 38-lead QFN package variant when sourcing. Confirm that the 'A' grade designation meets the required thermal and electrical specifications for your operating environment. Ensure compatibility with the intended PCB footprint and thermal pad requirements during integration planning.

Selection Notes

Select this component when designing systems requiring four distinct regulated outputs from a single wide-input source. It is suitable for applications needing precise power sequencing without external controllers. Consider the thermal dissipation capabilities of the QFN package relative to the total load current and ambient conditions.

Part Context

This device belongs to the LT3507A family of monolithic power management ICs. It shares architectural similarities with other multi-output regulators but distinguishes itself through integrated sequencing and wide input voltage tolerance. The family targets complex power distribution networks where board space and component count are critical constraints.

Replacement Considerations

LT3507AHUHF#PBF serves as a verified alternative within the same product family, offering identical functionality in the same package type.