LT8334RDE#TRPBF

Overview

The LT8334RDE#TRPBF is a low quiescent current synchronous boost, SEPIC, and inverting DC/DC converter manufactured by Analog Devices Inc. It integrates a 5A, 40V power switch to support high-current applications within a compact footprint. The device operates with an input voltage range of 2.7V to 36V and delivers up to 5A output current. Key electrical parameters include a switching frequency of 1.2MHz or 2.2MHz, a typical quiescent current of 190µA, and a shutdown supply current of 1.5µA. It features adjustable soft-start, cycle-by-cycle current limiting, and thermal shutdown protection. The component is housed in a DFN-16 package and is rated for operation between -40°C and +125°C.

Feature Summary

• Integrates a high-current 5A, 40V synchronous power switch for efficient step-up and inversion.
• Supports multiple topologies including boost, SEPIC, and inverting configurations.
• Features low quiescent current consumption to extend battery life in portable applications.
• Includes programmable soft-start and comprehensive protection mechanisms such as thermal shutdown.

Applications

• Battery-powered industrial equipment requiring high current from limited voltage sources
• Automotive systems utilizing 12V or 24V battery architectures
• Portable medical devices needing efficient voltage conversion from single-cell batteries
• Telecommunications infrastructure powered by standard battery voltages

Procurement Notes

Verify the specific suffix 'RDE' indicates the correct tape-and-reel packaging and temperature grade. Confirm the switching frequency variant (1.2MHz vs 2.2MHz) matches design requirements. Ensure compatibility with the DFN-16 package footprint during PCB layout. Cross-reference the manufacturer's latest datasheet for any recent revisions or obsolescence notices before finalizing procurement.

Selection Notes

Select this component when high output current up to 5A is required from low input voltages. Choose based on the necessary switching frequency to balance efficiency against EMI constraints. Consider the DFN-16 package for its thermal performance and small board area. Verify that the 40V switch rating provides sufficient headroom for transient spikes in the target application environment.

Part Context

This part belongs to the LT833x family of low IQ converters designed for high-efficiency power management. It shares architectural similarities with the LT8330 and LT8335 but distinguishes itself through higher current capability and specific voltage ratings. The family targets applications demanding robust performance in space-constrained designs without compromising on power delivery capabilities.

Replacement Considerations

LT8335IDDB#TRMPBF offers similar functionality with a 2A switch and 28V rating, suitable for lower current needs. LT8330HDDB#TRMPBF provides a 1A switch with a higher 60V rating for different voltage regimes. Verify pinout compatibility and thermal characteristics when substituting these alternatives.