STMicroelectronics LDK320ADU33R Linear Voltage Regulator 3.3V 200mA SOT-89
- Brand: STMicroelectronics
- Product Code: LDK320ADU33R
- Availability: In Stock
$0.20
- Ex Tax: $0.20
STMicroelectronics LDK320ADU33R: Precision Linear Voltage Regulation for Modern Electronics
The STMicroelectronics LDK320ADU33R represents a benchmark in linear voltage regulation technology, delivering exceptional performance for applications requiring stable 3.3V output at 200mA current capacity. This surface-mount linear regulator combines advanced semiconductor design with robust protection features, making it ideal for demanding environments in consumer electronics, industrial automation, and automotive systems.
Key Features and Technical Advantages
Engineered with a maximum input voltage capability of 18V, the LDK320ADU33R offers remarkable flexibility in power supply design. Its fixed 3.3V output voltage maintains ±2% accuracy across operating conditions, while the low dropout voltage of 350mV at full load ensures efficient operation even in low-headroom scenarios. The device's quiescent current of just 90µA significantly extends battery life in portable applications, complemented by an impressive 88dB PSRR at 120Hz that minimizes noise interference.
For design engineers seeking reliability, this SOT-89 packaged regulator incorporates comprehensive protection mechanisms including thermal shutdown and overcurrent limiting. Its operating temperature range of -40°C to 125°C TJ makes it suitable for both harsh industrial environments and consumer devices with variable thermal conditions.
| Parameter | Specification |
|---|---|
| Output Voltage | 3.3V (Fixed) |
| Output Current | 200mA |
| Input Voltage Range | Up to 18V |
| Dissipation Package | SOT-89 (TO-243AA) |
| Protection Features | Thermal/Overcurrent |
Applications and Design Considerations
This linear regulator excels in applications where stable power delivery is critical. Its compact SOT-89 footprint enables integration into space-constrained designs while maintaining excellent thermal performance. Typical implementations include powering microcontrollers, sensors, and analog circuits in IoT devices, medical equipment, and automotive control modules. The device's low noise characteristics make it particularly valuable in RF circuits and precision measurement systems.
When implementing the LDK320ADU33R in PCB layouts, designers should consider input/output capacitor selection for optimal stability. While the device maintains stability with small ceramic capacitors, careful selection of decoupling components can further enhance transient response performance. The tape-and-reel packaging format simplifies automated assembly processes, supporting efficient manufacturing workflows.
Performance Characteristics
The regulator's dynamic performance specifications demonstrate its versatility across operating conditions. With a 100µA maximum supply current and 10µA typical standby consumption, it offers exceptional power efficiency. The PSRR specification of 88dB at 120Hz decreasing to 48dB at 10kHz ensures clean power delivery across audio and RF frequency ranges. This performance profile positions the LDK320ADU33R as a preferred solution for applications requiring both electrical efficiency and noise immunity.
Tags: Linear Voltage Regulator, 3.3V Power IC, SOT-89 Package, 200mA Regulator, Industrial Power Solutions