SL7333
AEC-Q100 qualified 300mA LDO with 3.3V fixed output for modern low-voltage automotive systems.
Product Overview
Description
The SL7333 provides regulated 3.3V output for modern automotive electronics that use 3.3V logic levels. The device handles input voltages up to 45V, making it suitable for 12V and 24V automotive systems.
With 300mA output capability and low 80uA quiescent current, the SL7333 efficiently powers 3.3V MCUs, sensors, and communication modules. The 280mV dropout voltage at 300mA ensures regulation even during low battery conditions.
The device includes the same comprehensive protection features as the SL7205, ensuring reliable operation in harsh automotive environments. Available in SOT-223 and TO-252 packages.
Product Series
SL
Primary Application
3.3V MCU Power
Key Features
- High efficiency and reliability
- Optimized for industrial applications
- Comprehensive technical support
- Available from stock
Specifications
| Input Voltage Range | 4.0V - 45V |
|---|---|
| Output Voltage | 3.3V fixed |
| Output Current | 300mA max |
| Quiescent Current | 80uA typical |
| Dropout Voltage | 280mV at 300mA |
| Line Regulation | 0.05%/V typical |
| Load Regulation | 15mV typical |
| Temperature Range | -40°C to +125°C |
| Package | SOT-223, TO-252 |
| Qualification | AEC-Q100 Grade 1 |
Applications
3.3V MCU Power
Electronic system design
Sensor Power
Sensor signal conditioning
CAN Transceiver Power
Communication and interface
Low-voltage Systems
Electronic system design
Communication Modules
Communication and interface
FAE Expert Insights
"The SL7333 is essential for modern automotive designs using 3.3V logic. Many newer automotive MCUs and communication ICs operate at 3.3V, and this LDO provides clean, reliable power. The lower dropout voltage compared to 5V versions is beneficial for battery-powered applications. I've successfully used this LDO in designs with 3.3V ARM-based automotive MCUs and CAN transceivers. The protection features and wide temperature range make it suitable for under-hood applications."
3.3V automotive LDO for modern low-voltage automotive electronics
— Lisa Wang, BeiLuo
Frequently Asked Questions
When should I use 3.3V vs 5V for automotive applications?
3.3V vs 5V selection considerations: Use 3.3V when: 1) Using modern MCUs and ICs that operate at 3.3V, 2) Power consumption is critical (lower voltage = lower power), 3) Interfacing with 3.3V sensors and modules, 4) New designs where 5V legacy compatibility not required. Use 5V when: 1) Legacy system compatibility required, 2) Using 5V sensors or actuators, 3) Higher noise immunity needed (5V has better SNR), 4) Long cable runs where voltage drop is a concern. Many modern automotive designs use mixed voltages - 5V for power devices and sensors, 3.3V for digital logic and communication. Level shifters may be needed for interfacing between voltage domains.
Use 3.3V for modern designs with 3.3V components. Use 5V for legacy compatibility or when higher voltage beneficial.