STMicroelectronics LDL1117S30R Linear Voltage Regulator 3V 1.2A SOT-223

Reliable Low-Dropout Linear Regulation for Demanding Applications

The STMicroelectronics LDL1117S30R represents a new standard in linear voltage regulation technology, combining high performance with robust protection features in a compact SOT-223 package. This fixed-output 3V regulator delivers up to 1.2A of continuous current while maintaining exceptional stability across diverse operating conditions. As an active component in STMicroelectronics' power management portfolio, this device exemplifies the company's commitment to innovation in semiconductor solutions.

Advanced Technical Specifications

Engineered for efficiency and reliability, the LDL1117S30R features a maximum dropout voltage of just 0.6V at full load, enabling operation in low-voltage environments where traditional regulators would fail. Its wide 4.5V to 18V input voltage range provides flexibility for various power supply configurations, while maintaining precise 3V output regulation through advanced internal compensation circuitry.

This surface-mount regulator demonstrates exceptional thermal performance, with a guaranteed operating temperature range spanning -40°C to 125°C. The device's integrated protection features create a comprehensive safeguard system against common electrical faults:

Performance-Driven Design

The regulator's 87dB PSRR at 120Hz rapidly decreases to 65dB at 100kHz, effectively filtering power supply noise across multiple frequency ranges. This makes the LDL1117S30R particularly suitable for noise-sensitive applications in communications equipment and precision instrumentation. The device's 500µA quiescent current consumption ensures minimal power loss during normal operation, while its TO-261AA package provides excellent thermal dissipation characteristics.

Manufactured using STMicroelectronics' proven BCDMOS process technology, this regulator combines bipolar and CMOS transistors on a single die to optimize both performance and integration. The result is a highly reliable component that meets the demanding requirements of modern electronic systems across industrial, automotive, and consumer applications.

Comprehensive Applications Coverage

With its combination of high current capability and comprehensive protection features, the LDL1117S30R serves as an ideal power solution for:

- Portable electronic devices requiring stable 3V supply
- Industrial control systems needing reliable regulation
- Communication infrastructure equipment demanding clean power
- Automotive electronics operating in harsh environments
- Embedded systems requiring space-saving power solutions

The device's tape-and-reel packaging format supports automated PCB assembly processes, making it well-suited for high-volume manufacturing environments. Its RoHS-compliant construction meets modern environmental standards while maintaining electrical performance.

Technical Highlights

The LDL1117S30R's specifications demonstrate its position as a high-performance linear regulator:

• 1.2A maximum output current with ±2% accuracy
• 4.5V to 18V input voltage range
• 0.6V dropout voltage at full load
• Integrated thermal shutdown and current limiting
• Space-saving SOT-223 package
• Operating temperature range from -40°C to 125°C

These specifications make it particularly well-suited for applications where space constraints and thermal management are critical design considerations.

Tags: Power Management ICs, Linear Regulators, Semiconductor Components, Electronic Circuit Protection, Industrial Electronics