L4938ED013TR

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The L4938ED013TR is a monolithic dual linear voltage regulator from STMicroelectronics, designed for automotive microcomputer systems. It features two outputs: Output 1 provides 5V at 400mA with ±2% precision, while Output 2 offers a high-precision 5V standby supply at 100mA. The device operates within a DC supply range of 5V to 28V and withstands transient voltages up to 40V. Key electrical parameters include a maximum dropout voltage of 0.4V at 100mA and 0.6V at 400mA. It incorporates adjustable reset thresholds (3.8V–4.7V), enable/sense inputs protected against -5V transients, and ultra-low quiescent current of 65μA in standby mode.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Dual output configuration with independent 400mA main and 100mA standby regulators
• Integrated power-on reset function with user-adjustable threshold levels
• Robust input protection handling negative transients down to -5V on control pins
• Ultra-low standby current consumption for enhanced battery efficiency

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Automotive microcomputer system power supplies
• Engine control unit (ECU) power management
• Body control module (BCM) voltage regulation
• Infotainment system power distribution

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify component authenticity through authorized distributors as the part is obsolete. Confirm RoHS compliance status, as sources indicate conflicting data regarding REACH and RoHS3 adherence. Ensure the 20-SOIC package matches design requirements. Check for moisture sensitivity level 3 handling constraints during assembly. Validate that the specific suffix denotes the correct tape-and-reel packaging format.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when designing automotive electronics requiring dual isolated rails with strict standby current limits. The adjustable reset threshold allows customization for specific microcontroller brown-out detection needs. Consider the 40V transient tolerance for harsh automotive environments. Verify thermal performance in the 20-SO package for the intended load conditions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This device belongs to the L4938 family of advanced voltage regulators. It is specifically engineered for automotive applications where reliability under wide temperature ranges (-40°C to 150°C) and robustness against electrical noise are critical. The integration of sense and enable functions reduces external component count compared to discrete solutions.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

NCV47411PAAJR2G by onsemi is documented as a similar substitute.