E-L5970D

Overview

The E-L5970D is a discontinued step-down monolithic power switching regulator from STMicroelectronics. It delivers up to 1A output current with adjustable voltages ranging from 1.2V to 35V. The device operates on an input voltage between 4.4V and 36V, utilizing an internal P-Channel D-MOS transistor for efficient switching at a fixed frequency of 250kHz. Packaged in an 8-SOIC format, it features thermal shutdown, current limiting, and zero-load operation capabilities.

Feature Summary

• Integrates an internal P-Channel D-MOS switching element to minimize external component size
• Provides pulse-by-pulse current limit with internal frequency modulation for short circuit protection
• Includes thermal shutdown and protection against feedback disconnection

Applications

• Computer related applications requiring 5V bus conversion
• High intensity LED driver circuits with 6 to 12 VDC input
• General purpose step-down switching regulator designs

Procurement Notes

Verify the obsolete status of this part number before design finalization. Confirm availability of active replacements such as L5970D or L5970D013TR. Ensure supply chain stability for end-of-life components by validating long-term sourcing options. Review datasheet revisions for any parameter shifts in successor models.

Selection Notes

Select this component only if legacy compatibility is required due to its discontinued status. For new designs, consider the active L5970D which offers identical electrical specifications. Evaluate the L5970AD variant if higher switch current limits or increased switching frequencies are necessary for specific application constraints.

Part Context

This component belongs to the L5970 series of step-down regulators manufactured by STMicroelectronics. It shares core architectural similarities with the L5970D but carries the E-prefix designation indicating its end-of-life classification within the manufacturer's product lifecycle management system.

Replacement Considerations

Direct substitutes include L5970D and L5970D013TR. These active parts maintain equivalent electrical performance and pinout configurations.