STMicroelectronics LD1117S18TR Linear Voltage Regulator 1.8V 800mA

STMicroelectronics LD1117S18TR - High-Performance Linear Voltage Regulation

The

STMicroelectronics LD1117S18TR

is a precision linear voltage regulator designed to deliver stable 1.8V output at currents up to 800mA. This SOT-223 packaged device combines high reliability with advanced protection features, making it ideal for modern power management applications where space efficiency and thermal performance are critical.

Parameter	Value
Output Voltage	1.8V (Fixed)
Max Input Voltage	15V
Output Current	800mA
Dissipation	1.2V @ 800mA
PSRR	75dB (120Hz)

Engineered for demanding electronic systems, this linear regulator operates across a wide temperature range (0°C to 125°C) while maintaining ±2% output accuracy. Its low dropout voltage ensures efficient operation even in battery-powered devices where maintaining regulation at declining input voltages is crucial.

The device integrates comprehensive protection mechanisms including

over-temperature shutdown

and

over-current protection

, eliminating the need for external safety components. Its surface-mount SOT-223 package offers excellent thermal dissipation characteristics while maintaining PCB footprint efficiency.

Key technical advantages include:

• High ripple rejection ratio (75dB) for noise-sensitive applications
• 10mA typical quiescent current for improved efficiency
• Robust design suitable for industrial and automotive environments
• Space-saving SOT-223 packaging with standard pinout

This regulator finds applications in various domains including:

• Embedded systems power supplies
• Portable electronics voltage regulation
• Industrial control modules
• Automotive sensor interfaces
• Low-noise instrumentation circuits

Designers appreciate its ease of implementation requiring only standard input/output capacitors. The device's inherent stability with ceramic capacitors simplifies BOM management while reducing overall solution cost.

Compared to switching regulators, the

LD1117S18TR

offers superior noise performance and simpler implementation for applications where efficiency trade-offs are acceptable. Its fixed output voltage version eliminates external resistor divider requirements, further reducing component count and potential error sources.

Tags: Power Management ICs, STMicroelectronics Components, SOT-223 Package, Industrial Voltage Regulators, Automotive Electronics