L6738TR

DC DC Switching Controllers Overview

The L6738TR is a single-phase step-down switching controller manufactured by STMicroelectronics, designed for high-efficiency DC-DC converter applications. It operates with a supply voltage range of 5 V to 12 V and supports a maximum output current of 2 A. The device utilizes a buck topology with a fixed switching frequency of 200 kHz and achieves a maximum duty cycle of 100%. It features integrated synchronous rectifier drivers and clock synchronization capabilities. The component is housed in a 16-VFQFPN package (3x3 mm) and functions within a junction temperature range of -40°C to +125°C.

DC DC Switching Controllers Feature Summary

• Integrated high-current drivers for synchronous buck conversion
• Clock synchronization capability for multi-phase systems
• Comprehensive protection including overcurrent and overvoltage monitoring
• Supports 100% duty cycle operation for low dropout performance

DC DC Switching Controllers Applications

• Single-phase DC-DC power supplies
• Point-of-load regulation modules
• Industrial control system power distribution
• Embedded system voltage conversion

DC DC Switching Controllers Procurement Notes

Verify the obsolete status and End-of-Life (EOL) designation before procurement, as the manufacturer has indicated this product will be discontinued. Confirm availability through authorized distributors or remaining stock channels, noting that lead times may vary significantly due to limited production runs. Ensure that any substitute components meet the same electrical specifications and thermal requirements to maintain system reliability.

DC DC Switching Controllers Selection Notes

Select the L6738TR for designs requiring a compact, single-phase buck solution with integrated driver capabilities. Consider its 200 kHz fixed frequency and 100% duty cycle when designing for low output voltages. Evaluate the need for clock synchronization if phase shifting is required in future expansions. Verify that the external MOSFETs can handle the integrated driver's current output and that the PCB layout accommodates the 16-VFQFPN package dimensions.

DC DC Switching Controllers Part Context

The L6738 belongs to STMicroelectronics' portfolio of power management ICs focused on efficient voltage regulation. It serves as a controller rather than a complete regulator, requiring external power stages. This specific model is part of a series that includes variants like the L6739, which offers light-load efficiency optimization. The TR suffix indicates reel packaging for automated surface-mount assembly.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the End-of-Life status, design teams should consult official replacement guides or contact the manufacturer directly for recommended alternatives that match the pinout and electrical characteristics.