STMicroelectronics LD1117AS33TR Voltage Regulator IC - 3.3V Fixed Output, 1A Current, SOT-223 Package
- Brand: STMicroelectronics
- Product Code: LD1117AS33TR
- Availability: In Stock
$0.15
- Ex Tax: $0.15
Reliable Voltage Regulation for Modern Electronics
In today's fast-paced technological landscape, precision power management has become critical for electronic devices. The LD1117AS33TR from STMicroelectronics emerges as a premier solution for engineers seeking dependable voltage regulation in compact SOT-223 packages. This fixed 3.3V linear regulator combines robust performance with thermal protection features, making it ideal for applications where stable power delivery is non-negotiable. Whether you're designing embedded systems, industrial controls, or consumer electronics, this IC offers the perfect blend of efficiency and reliability.
Technical Excellence in Power Management
Engineered with advanced CMOS technology, the LD1117AS33TR delivers consistent 1A output current while maintaining exceptional thermal stability. Its 15V maximum input voltage capability provides flexibility for various power supply configurations, while the low dropout voltage of 1.3V ensures optimal performance even under fluctuating load conditions. The device's inherent design advantages are complemented by comprehensive protection mechanisms, including built-in over-temperature and over-current safeguards that prevent damage during unexpected operational stresses.
| Parameter | Specification |
|---|---|
| Output Voltage | 3.3V Fixed |
| Output Current | 1A |
| Input Voltage Range | Max 15V |
| Dropout Voltage | 1.3V @ 1A |
| Operating Temperature | 0°C to 125°C |
Design Advantages for Modern Applications
The SOT-223 packaging format offers significant benefits for space-constrained designs while maintaining excellent thermal dissipation characteristics. This surface-mount device (SMD) solution simplifies PCB layout with its single-regulator configuration, reducing component count and minimizing potential failure points. The LD1117AS33TR's 75dB PSRR (Power Supply Rejection Ratio) at 120Hz ensures clean power delivery even in noisy environments, making it particularly valuable for analog circuits and RF applications where signal integrity is paramount.
Engineers appreciate the device's quiescent current specification of just 10mA under maximum load conditions, which contributes to overall system power efficiency. The absence of external components required for operation further enhances design simplicity and reliability. These characteristics make the LD1117AS33TR particularly well-suited for next-generation electronics where miniaturization, thermal performance, and power efficiency converge as critical design considerations.
Industrial and Commercial Applications
This versatile voltage regulator finds application across multiple domains including telecommunications equipment, automotive electronics, and industrial automation systems. Its wide operating temperature range (-40°C to +125°C) meets automotive and industrial grade requirements, while the tape & reel packaging format supports automated assembly processes. In consumer electronics, the LD1117AS33TR proves invaluable for powering microcontrollers, sensors, and other low-voltage components requiring stable 3.3V supply rails.
The device's inherent reliability and STMicroelectronics' industry-leading quality standards make it a preferred choice for mission-critical applications. When combined with appropriate heatsinking and input filtering, this regulator can deliver consistent performance across extended operational lifetimes. Its compatibility with standard PCB manufacturing processes ensures seamless integration into both prototype and mass production environments.
Tags: Power Management ICs, Linear Voltage Regulators, Surface Mount Devices, Industrial Electronics Components, Automotive Grade Semiconductors