Overview
The L5050STR, produced by STMicroelectronics, is a 5 V low dropout linear voltage regulator designed for automotive applications. It is available in both single (L5050S) and dual isolated (L5050SD) output configurations. The regulator is packaged in an SO-8 case and is AEC-Q100 qualified, ensuring reliability and performance in harsh automotive environments. It features a wide operating DC supply voltage range of 5.6 V to 40 V and delivers up to 50 mA of DC load current for the single output version and up to 2x50 mA for the dual output version. The L5050STR is known for its low dropout voltage, low quiescent current consumption, and high output voltage accuracy of ±2% over a wide temperature range.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| DC Supply Voltage (VS) | 5.6 to 40 | V |
| Output Voltage (Vo) | 5 ± 2% | V |
| Output Current (Io) | 50 mA (single), 2x50 mA (dual) | mA |
| Pulsed Output Current | Up to 100 mA (single), up to 2x100 mA (dual) | mA |
| Quiescent Current (Iqn) | 50 µA (typical) | µA |
| Dropout Voltage (Vdp) | 500 mV | mV |
| Junction Operating Temperature (TJ) | -40 to 150 | °C |
| Enable Input Voltage (VEn) | High: 3 V, Low: 1 V | V |
| Thermal Resistance (RthJA) | 96 °C/W (single), 94 °C/W (dual) | °C/W |
Key Features
- Low Dropout Voltage: Ensures efficient voltage regulation with a dropout voltage of 500 mV.
- Low Quiescent Current: Consumes as low as 50 µA of quiescent current, reducing power consumption in standby mode.
- Precision Output Voltage: Maintains high output voltage accuracy of ±2% over a wide temperature range.
- Dual Isolated Outputs: Available in dual isolated configuration (L5050SD) for applications requiring multiple regulated voltages.
- Enable Input: Features enable input pins to switch the regulator on or off, with a low quiescent current in standby mode.
- Thermal and Short-Circuit Protection: Includes thermal shutdown and short-circuit protection to ensure device reliability.
- Wide Temperature Range: Operates over a junction temperature range of -40 to 150 °C.
- AEC-Q100 Qualified: Meets automotive quality standards for reliability and performance.
Applications
The L5050STR is primarily designed for automotive applications, including but not limited to:
- Infotainment systems
- Navigation and telematics
- Safety and security systems
- Body and chassis control systems
- Other automotive electronic control units (ECUs)
Q & A
- What is the operating DC supply voltage range of the L5050STR?
The operating DC supply voltage range is from 5.6 V to 40 V.
- What is the maximum output current of the L5050STR?
The maximum output current is 50 mA for the single output version and 2x50 mA for the dual output version.
- What is the quiescent current consumption of the L5050STR?
The quiescent current consumption is typically 50 µA.
- Does the L5050STR have thermal protection?
- What is the output voltage accuracy of the L5050STR?
The output voltage accuracy is ±2%.
- Is the L5050STR AEC-Q100 qualified?
- What is the junction operating temperature range of the L5050STR?
The junction operating temperature range is -40 to 150 °C.
- Does the L5050STR have short-circuit protection?
- How do I enable or disable the voltage regulator in the L5050STR?
The regulator can be enabled or disabled using the enable input pin with a high or low voltage signal.
- What type of package is the L5050STR available in?
The L5050STR is available in an SO-8 package.
