STMicroelectronics LD1117S33CTR Linear Voltage Regulator 3.3V 800mA SOT-223

Reliable Power Management Solution: LD1117S33CTR Linear Voltage Regulator

In modern electronics design, maintaining stable power supply is critical for system reliability. The STMicroelectronics LD1117S33CTR linear voltage regulator emerges as a versatile solution for engineers seeking precise voltage regulation in compact form factors. This fixed-output 3.3V regulator combines high performance with robust protection features, making it ideal for various embedded systems and industrial applications.

Key Technical Advantages

Engineered with STMicroelectronics' advanced bipolar technology, this SOT-223 packaged regulator delivers 800mA output current while maintaining exceptional stability. Its 15V maximum input voltage capability provides flexibility in power supply design, accommodating both standard 5V and higher voltage rails. The device's 1.3V dropout voltage at full load ensures efficient operation even under varying input conditions.

Operating across the industrial temperature range (-40°C to 125°C), the LD1117S33CTR incorporates comprehensive protection mechanisms including thermal shutdown and overcurrent limiting. These features make it suitable for harsh environments where reliability is paramount. The surface-mount SOT-223 package offers space-saving advantages while maintaining excellent thermal dissipation characteristics.

Performance Specifications

Design Applications

This voltage regulator finds applications in diverse fields including:

• Embedded systems power supply
• Industrial control equipment
• Battery-powered devices
• Data communication hardware
• Automotive electronics

The device's 75dB PSRR at 120Hz makes it particularly suitable for noise-sensitive applications requiring clean power delivery. Its compatibility with standard SOT-223 footprint simplifies PCB layout while maintaining thermal performance.

Design Considerations

When implementing the LD1117S33CTR in circuit designs, engineers should consider:

1. Proper input/output capacitor selection
2. Thermal management for high-current applications
3. Input voltage stability requirements
4. Load transient response characteristics

The regulator's active status and tape & reel packaging facilitate volume production, while its competitive pricing structure offers cost advantages in high-volume applications. With 210,000 units in stock availability, this component provides both technical and logistical benefits for design teams.

Tags: power management IC, surface mount regulator, fixed output voltage, electronics component, voltage regulation solution