STMicroelectronics Automotive Low Dropout Voltage Regulator 28V SO-8 8-Pin L99VR01STR

STMicroelectronics L99VR01STR is a precision low dropout linear voltage regulator designed primarily for automotive applications. Packaged in a compact SO-8 8-pin surface mount form factor, it delivers up to 200 mA load current with high efficiency and ultra-low quiescent current of 1 μA when disabled. The device can tolerate input voltages up to 40 V to withstand load dump conditions, providing reliable power regulation across automotive electrical systems.

The operating input voltage ranges from 2.15 V to 28 V, supporting various battery and power supply voltages commonly found in vehicles. The regulator’s output voltage is selectable via configuration pins (SELx) to fixed voltages including 0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 2.8 V, 3.3 V, or 5 V, allowing flexible use in multiple circuit designs.

This IC maintains a tight output voltage accuracy of ±2% throughout a wide temperature range, line voltage, and load current variations, ensuring stable operation of automotive electronics. The device integrates enable and reset functions with output voltage monitoring, and includes a programmable watchdog feature for enhanced system reliability through an external capacitor.

Designed to meet automotive standards such as AEC-Q100 and with a maximum operating temperature rating of 175°C, the L99VR01STR is optimized for harsh environments. Its SO-8 package measures 5 mm by 6.2 mm by 1.62 mm, suitable for space-constrained PCB layouts.

Automotive grade low dropout regulator with 200 mA max load current. Wide operating input voltage 2.15 V to 28 V with 40 V load dump tolerance. Ultra-low quiescent current (1 μA) during disable mode. Selectable fixed output voltages from 0.8 V to 5 V via SELx pins.

High output voltage accuracy ±2% for stability across conditions. Enable input and reset output for voltage monitoring functions. Programmable watchdog with external capacitor for system safety. Automotive qualified to AEC-Q100 with max operating temperature 175°C.

Compact SO-8 surface mount package: 5 mm x 6.2 mm x 1.62 mm.

This voltage regulator is ideal for automotive electronic control units, power distribution modules, and embedded applications requiring precise voltage regulation under demanding conditions. It ensures reliable operation and extends system longevity in automotive manufacturing, industrial control, and commercial electronics sectors.

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