LT3507HUHF#PBF

Overview

The LT3507HUHF#PBF is a high-performance power management IC 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 up to 32.4V. The device provides a maximum output current of 2.4A across its four outputs, with a typical quiescent current of 2mA. Switching frequencies are programmable from 250kHz to 2.5MHz. It is housed in a 38-lead QFN package and rated for operation between -40°C and +150°C.

Feature Summary

• Integrates three synchronous buck regulators and one LDO within 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 independent run pins for each converter to allow flexible control and shutdown.

Applications

• Automotive electronic systems requiring robust multi-voltage regulation
• Industrial control equipment with distributed power architectures
• Telecommunications infrastructure power distribution units

Procurement Notes

Verify the specific suffix HUHF confirms the QFN-38 package variant during sourcing. Confirm RoHS compliance status through official manufacturer documentation before integration. Ensure the ordering part number matches the exact thermal pad and pin configuration required by the PCB layout. Cross-reference the datasheet revision date to validate parameter accuracy against current production standards.

Selection Notes

Select this component when designing systems that require multiple regulated rails from a wide input voltage range. It is suitable for applications needing integrated sequencing without external logic controllers. Consider the thermal performance of the QFN package relative to the total load current. Verify that the required switching frequency falls within the 250kHz to 2.5MHz programmable range for optimal efficiency.

Part Context

This part belongs to the LT3507 family of monolithic DC/DC converters designed for complex power distribution needs. It consolidates multiple power stages into one solution, reducing board space compared to discrete implementations. The family is characterized by high efficiency and integrated protection features suitable for demanding environments.

Replacement Considerations

LT3507AHUHF#PBF offers similar functionality with potentially different automotive qualification or temperature grade specifications. LT3507EUHF#PBF may provide alternative electrical characteristics or packaging options. Verify pin compatibility and thermal requirements before substituting any related model numbers.