L6926Q1TR

Voltage Regulators - DC DC Switching Regulators Overview

The L6926Q1TR is a high-efficiency monolithic synchronous step-down DC-DC converter manufactured by STMicroelectronics. It operates with an input voltage range of 2 V to 5.5 V and delivers a maximum output current of 800 mA. The device features an adjustable output voltage from 0.6 V to 5.5 V, controlled via a fixed 600 kHz switching frequency in current-mode architecture. It includes external synchronization capability from 500 kHz to 1.4 MHz, selectable low-noise or low-consumption modes, and integrated protections including overvoltage, short-circuit, and thermal shutdown at 150 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• High efficiency up to 95% with internal synchronous switches eliminating the need for external Schottky diodes
• Extremely low quiescent current with 1 µA maximum shutdown supply current for battery-powered applications
• Low-dropout operation enabled by duty cycle saturation up to 100%
• External clock synchronization allows noise management in sensitive environments

Voltage Regulators - DC DC Switching Regulators Applications

• Single Li-Ion cell supplied applications
• Noise-sensitive electronic systems requiring synchronized switching
• Portable devices demanding low quiescent current operation
• Battery-powered equipment utilizing low-dropout regulation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix Q1TR against the official datasheet to confirm package type and tape-and-reel specifications. Ensure compatibility with the required input voltage range of 2 V to 5.5 V and output current requirements up to 800 mA. Confirm that the 8-VFQFPN package aligns with PCB layout constraints. Check RoHS compliance status and moisture sensitivity level prior to assembly planning.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a compact synchronous buck regulator is needed for single-cell lithium-ion applications. The 600 kHz fixed frequency offers a balance between size and efficiency. External synchronization is critical if multiple converters operate nearby to prevent audible noise or interference. Consider the ±1% output voltage accuracy for precision load requirements. Evaluate thermal performance given the 150 °C junction temperature limit.

Voltage Regulators - DC DC Switching Regulators Part Context

The L6926 series represents STMicroelectronics' line of high-efficiency synchronous buck regulators. The L6926Q1TR variant specifically denotes the QFN package configuration within this family. It shares architectural similarities with other L692x models but differs in packaging and specific pinout arrangements. This part is designed for space-constrained portable electronics requiring reliable power management from single-cell sources.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify functional equivalence with L6926 variants such as L6926D1013TR only if package and electrical parameters match exactly. Cross-reference with L6928Q1TR for higher frequency applications, noting the difference in switching frequency (1.4 MHz vs 600 kHz).

Voltage Regulators - DC DC Switching Regulators FAQ

Can the L6926Q1TR be externally synchronized?

Yes, the device supports external clock synchronization from 500 kHz to 1.4 MHz.

What is the minimum input voltage for the L6926Q1TR?

The minimum input voltage is 2 V, suitable for single Li-Ion cell applications.

Does the L6926Q1TR include protection features?

It includes overvoltage protection, short-circuit protection, and thermal shutdown at 150 °C.