L4978D013TR

Voltage Regulators - DC DC Switching Regulators Overview

The L4978D013TR is a monolithic step-down switching regulator from STMicroelectronics, delivering up to 2A output current with an adjustable voltage range of 3.3V to 50V. It operates within an input voltage window of 8V to 55V and supports switching frequencies up to 300kHz. The device integrates an internal power D-MOS transistor with a typical on-resistance of 0.25Ω for high efficiency. Key electrical parameters include a static current of 2.5mA and a shutdown supply current of 16mA. It functions reliably across a junction temperature range of -40°C to +150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates pulse-by-pulse current limiting and hiccup mode for short circuit protection
• Includes soft-start function and thermal shutdown capabilities
• Features inhibit pin for zero current consumption during standby
• Provides protection against feedback loop disconnection

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial control systems requiring wide input voltage ranges
• Automotive electronics operating within specified thermal limits
• General-purpose DC-DC conversion in embedded applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'D013TR' confirms the SOIC-16 surface-mount package and reel packaging format. Confirm RoHS compliance status and moisture sensitivity level (MSL 3) requirements for your assembly process. Ensure the ordering part number matches the exact manufacturer designation to avoid compatibility issues with design-in documentation.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a buck converter capable of handling 55V inputs and delivering 2A is required. Consider the SOIC-16W package for surface-mount assembly constraints. Evaluate the 300kHz switching frequency against electromagnetic interference requirements. Compare thermal dissipation characteristics against available PCB copper area for heat sinking.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the L4978 series of step-down regulators. It utilizes BCD mixed technology to achieve high switching speeds and efficiency. The series is designed for applications needing robust protection features and wide input voltage tolerance. It serves as a solution for converting higher bus voltages to regulated lower rails in compact form factors.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The L4978D is a tube-packaged variant of the same functional device. Verify pinout and thermal performance equivalence before substitution. No other direct cross-references are confirmed in public data.