L6928Q1TR

Voltage Regulators - DC DC Switching Regulators Overview

The L6928Q1TR is a high-efficiency monolithic synchronous buck converter manufactured by STMicroelectronics. It operates with an input voltage range of 2 V to 5.5 V, making it suitable for single Li-Ion cell applications. The device provides a maximum output current of 800 mA with an adjustable output voltage starting from 0.6 V up to 5.5 V. It utilizes a fixed 1.4 MHz switching frequency and supports external synchronization between 1 MHz and 2 MHz. Key electrical specifications include ±1% output voltage accuracy, a maximum shutdown supply current of 1 µA, and thermal shutdown protection at 150 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous rectification architecture eliminates the need for an external Schottky diode.
• 100% duty cycle capability enables low-dropout operation for efficient power management.
• Externally synchronizable clock input reduces noise in sensitive environments.
• Integrated Power Good signal indicates valid output voltage status.

Voltage Regulators - DC DC Switching Regulators Applications

• Single Li-Ion cell powered portable devices
• Noise-sensitive electronic systems requiring synchronized switching
• Battery-operated equipment requiring low quiescent current

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the package type matches the design requirements, as this component uses an 8-VFDFN (3x3) package with exposed pad. Confirm that the order suffix Q1 corresponds to the specific tape and reel configuration required for automated assembly processes. Ensure compatibility with the intended operating temperature range of -40°C to 150°C TJ before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this regulator when input voltages are limited to a single lithium-ion cell range. The synchronous design is preferred for maximizing efficiency at moderate loads. Consider the external synchronization feature if multiple converters operate nearby to prevent audible noise or interference. Verify that the required output voltage can be set using the available external resistor divider network within the specified limits.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the L6928 family of DC-DC regulators designed for high efficiency and compact footprints. It is part of STMicroelectronics' portfolio of power management integrated circuits aimed at mobile and battery-powered applications. The device integrates control logic, drivers, and power switches into a single monolithic structure.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Consult official STMicroelectronics documentation for qualified replacement part numbers. Verify pin-to-pin compatibility and electrical parameter alignment before substitution.

Voltage Regulators - DC DC Switching Regulators FAQ

Can the switching frequency be adjusted?

The internal switching frequency is fixed at 1.4 MHz, but the device supports external synchronization from 1 MHz to 2 MHz.

What is the minimum output voltage?

The output voltage is adjustable down to 0.6 V using an external resistor divider.