STMicroelectronics

LDLN015PU18R

LDLN015PU18R Description

The LDLN015PU18R from STMicroelectronics is a fixed-output, low-dropout (LDO) linear voltage regulator designed to deliver a stable 1.8V output with a maximum current of 150mA. Operating within an input voltage range up to 5.5V, this regulator is optimized for low-power applications, featuring a quiescent current (Iq) of just 60 µA and a supply current of 120 µA (max). Packaged in a 6-pin DFN (Tape & Reel), it is suitable for surface-mount PCB designs in space-constrained environments.

LDLN015PU18R Features

• High PSRR (92dB @ 1kHz, 50dB @ 100kHz) ensures excellent noise rejection, making it ideal for sensitive analog and RF circuits.
• Enable control pin allows for power management, reducing standby power consumption.
• Protection features include over-current and over-temperature shutdown, enhancing reliability in harsh conditions.
• Low dropout voltage ensures stable operation even with input voltages close to the output.
• ROHS3 compliant and REACH unaffected, meeting environmental regulations.
• Moisture Sensitivity Level (MSL) 1 (Unlimited) ensures ease of handling in manufacturing.

LDLN015PU18R Applications

• Battery-powered IoT devices (sensors, wearables) benefit from its low Iq and high efficiency.
• Portable electronics (smartphones, tablets) requiring stable voltage with minimal noise.
• Embedded systems where space-saving DFN packaging is critical.
• Industrial control modules needing robust protection against overcurrent and overheating.
• Medical devices requiring high PSRR for noise-sensitive signal conditioning.

Conclusion of LDLN015PU18R

The LDLN015PU18R is a high-performance LDO regulator offering low power consumption, superior noise immunity, and robust protection features. While obsolete, it remains a reliable choice for legacy designs or applications where stable 1.8V power with minimal footprint is essential. Its combination of efficiency, compact packaging, and protection mechanisms makes it well-suited for battery-operated, noise-sensitive, and space-constrained applications. Engineers should evaluate alternative modern equivalents for new designs while considering this regulator for maintenance or specific use cases.