LD39015M12R

Product Overview

The LD39015M12R from STMicroelectronics is a single-output positive fixed linear voltage regulator intended for generating a 1.2 V rail from input voltages up to 5.5 V. The device uses a surface-mount SOT-23-5 package and provides 150 mA output current, 0.1 V maximum dropout at 100 mA, and 50 µA quiescent current. The device includes an enable control and overcurrent and overtemperature protection, with PSRR of 65 dB to 62 dB from 1 kHz to 10 kHz and specified operation from -40°C to 125°C.

Key Features

• Fixed 1.2 V positive output with a maximum input voltage of 5.5 V
• 150 mA output current rating and 0.1 V maximum dropout at 100 mA
• 50 µA quiescent current and 70 µA maximum supply current
• Enable control plus overcurrent and overtemperature protection
• Surface-mount SOT-23-5 package with operation from -40°C to 125°C

Applications

• Battery-powered portable electronics requiring a fixed 1.2 V rail with 50 µA quiescent current
• Embedded systems that use the enable control for rail sequencing or selective shutdown
• Compact embedded boards requiring a fixed 1.2 V output at 150 mA
• Input ripple-sensitive circuits where PSRR of 65 dB to 62 dB from 1 kHz to 10 kHz is useful

Design & Procurement Notes

Designers should verify that the input supply remains within the 5.5 V maximum and leaves sufficient headroom above the fixed 1.2 V output, especially when the load approaches 100 mA and the 0.1 V dropout specification applies. The enable control can be used to manage activation, while the overcurrent and overtemperature protection features should be accounted for in circuit design. Because the device is a linear regulator, the input-to-output voltage difference and output current affect dissipation, so thermal layout and ambient temperature should be checked within the specified -40°C to 125°C operating range.