STMicroelectronics Voltage Regulator 38V DFN 6-Pin Low Quiescent Current 140μA Automotive AEC-Q100 LDO40LPU33RY

STMicroelectronics LDO40LPU33RY Voltage Regulator is a precision low dropout regulator designed for automotive and industrial applications requiring high reliability and performance. Packaged in a compact DFN 6-pin (3x3 mm) surface-mount package, this device features a wide input voltage range from 3.5V minimum startup to 38V maximum, enabling operation from various power sources including automotive batteries.

The regulator delivers up to 400 mA output current with ultra-low dropout voltage ensuring efficient power conversion with minimal power loss. It provides highly accurate and stable output voltages with options from adjustable 2.5 V to fixed voltages including 3.0 V, 3.3 V, 5.0 V, and 8.5 V, with a typical accuracy of ±1% at 25 °C and ±3% including line, load, and temperature variations.

Key features include an extremely low quiescent current of 140 μA typically, protecting system power budgets in battery-operated and low-power devices. The device complies with automotive standard AEC-Q100, making it suitable for automotive electronics requiring stringent quality and durability measures. It features protection mechanisms such as current limitation and thermal shutdown to safeguard the circuit and ensure reliable operation under fault conditions.

The voltage regulator exhibits a high power supply rejection ratio (PSRR) of 70 dB at 1 kHz, minimizing the influence of input voltage ripple and noise on the output voltage. The output noise is exceptionally low at 20 μVRMS/VOUT, providing clean voltage rails critical for sensitive analog and digital circuits.

Operating temperature range spans from -40 °C to +125 °C, suitable for harsh industrial, automotive, and consumer environments. The DFN6 package with wettable flanks ensures improved solder joint reliability and manufacturability in modern surface mount assembly processes.

Operates with low quiescent current for energy-efficient applications. Wide input voltage range supports diverse power sources up to 38V. Automotive AEC-Q100 standard compliant for reliable automotive use. Accurate output voltage options with ±1% typical accuracy at 25°C.

Integrated current limitation and thermal shutdown protection features. Compact DFN6 3x3 mm surface-mount package for space-constrained designs. High PSRR at 1 kHz reduces noise for sensitive circuits. Low output noise ensures stable voltage supply.

Wide operating temperature range suitable for industrial environments.

This Voltage Regulator is ideal for industrial, automotive, consumer electronics, and telecommunications applications where precision voltage regulation, reliability, and low power consumption are critical. It is especially suited for automotive embedded systems and power management in electronic control units (ECUs), sensors, and communication modules.

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