L99VR01STR

Overview

The L99VR01STR is an automotive-grade low dropout linear voltage regulator (LDO) manufactured by STMicroelectronics, designed for robust power management in vehicle electronics. It delivers a maximum output current of 200 mA with a configurable output voltage selectable via SEL pins from 0.8 V to 5 V. The device features a wide operating input voltage range of 2.15 V to 28 V and withstands transient load dump events up to 40 V. It includes integrated protections such as thermal shutdown, short-circuit current limitation, and undervoltage lockout (UVLO). The STR suffix indicates the component is supplied in a tape and reel packaging format.

Feature Summary

• Configurable output voltage selection through digital SEL pins
• High input voltage tolerance for automotive load dump protection
• Integrated reset output for monitoring regulated supply status
• Fast output discharge circuitry for rapid power-down

Applications

• Automotive body modules and junction boxes
• Cluster instrumentation power supplies
• Door modules and keyless entry systems
• Sensor interface circuits requiring stable post-regulation

Procurement Notes

Verify that the ordering suffix 'STR' corresponds to the required tape and reel packaging configuration for automated assembly processes. Confirm the specific package variant (SO-8 or PowerSSO-12) matches the design footprint, as the base part number covers multiple physical packages. Ensure the selected version aligns with functional safety requirements if advanced thermal warning or programmable short-circuit control is needed.

Selection Notes

Select this regulator when designing automotive systems requiring a single adjustable output rail with high noise rejection and low quiescent current. The device supports both battery connection and post-regulation from pre-regulated sources. Consider the L99VR01J variant if programmable short-circuit current limits or extended temperature operation up to 175°C are necessary, as these features are exclusive to that sub-version.

Part Context

This component belongs to the L99VR01 series of automotive linear voltage regulators. The series is characterized by its ability to operate directly from vehicle batteries or downstream of DC/DC converters. It is engineered to meet AEC-Q100 qualification standards, ensuring reliability under harsh automotive environmental conditions including wide temperature ranges and electrical stress.

Replacement Considerations

Direct pin-to-pin replacements within the same family include the L99VR01S (bulk packaging) and L99VR01J (enhanced diagnostic features). Verify that any substitute maintains the same SO-8 or PowerSSO-12 package dimensions and electrical characteristics to ensure compatibility with existing PCB layouts.