L4970A

Voltage Regulators - DC DC Switching Regulators Overview

The L4970A is a step-down monolithic power switching regulator delivering 10A output current with an adjustable voltage range from 5.1V to 40V. It utilizes BCD mixed technology and an internal DMOS transistor for high efficiency and fast switching times up to 500kHz. The device features a precise 5.1V ±2% on-chip reference, internal feed-forward line regulation, and soft-start capability. Integrated protections include pulse-by-pulse current limiting, thermal shutdown, and under-voltage lockout. It includes reset and power fail functions for microprocessor support and operates within a junction temperature range of -40°C to +150°C in a 15-lead Multiwatt package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Delivers 10A output current using BCD mixed technology and an internal DMOS transistor for high efficiency.
• Includes integrated reset and power fail functions specifically designed for microprocessor applications.
• Features internal feed-forward line regulation and soft-start input/output synchronization pins.
• Provides comprehensive protection against short circuits via current limiting and thermal shutdown.

Voltage Regulators - DC DC Switching Regulators Applications

• Microprocessor power supply systems requiring reset and power fail signals
• Industrial control equipment utilizing buck converter topologies
• Automotive electronics operating within wide voltage ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm the specific revision status as the part may be subject to end-of-life notices. Ensure the ordering suffix matches the required package variant. Request official datasheets and compliance certificates prior to finalizing procurement decisions to guarantee technical suitability.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a high-current 10A buck regulator with integrated microprocessor supervision is required. The wide input voltage tolerance and adjustable output make it suitable for diverse industrial environments. Consider the thermal performance of the Multiwatt package for heat dissipation requirements. Verify that the 500kHz switching frequency aligns with external filter component constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

The L4970A belongs to the L4970 series of high-current switching regulators manufactured by STMicroelectronics. This family focuses on robust power management solutions for demanding applications. The device distinguishes itself by combining high output current with advanced digital control features like feed-forward regulation. It serves as a critical power stage in systems needing reliable voltage conversion and system monitoring.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

• L4970

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum switching frequency supported by the L4970A?

The L4970A supports efficient operation at switching frequencies up to 500kHz.

Does the L4970A include protection against feedback loop disconnection?

Yes, the device includes protection against feedback loop disconnection to ensure stable operation.