Overview
The STMicroelectronics LF50ABDT-TR is a high-performance, low-dropout (LDO) linear voltage regulator designed to provide a stable 5V output voltage. This regulator is part of the LFXX series, known for its very low dropout voltage and low quiescent current, making it ideal for low noise, low power applications, particularly in battery-powered systems. The LF50ABDT-TR is packaged in a DPAK (TO-252-3) surface mount package and operates over a wide temperature range of -40°C to 125°C.
Key Specifications
| Parameter | Description | Min. | Typ. | Max. |
|---|---|---|---|---|
| Output Voltage | Fixed 5V | 4.95 V | 5 V | 5.05 V |
| Output Current | Maximum current | - | - | 500 mA |
| Input Voltage | Operating input voltage range | 6 V | - | 16 V |
| Dropout Voltage | At 500 mA output current | 0.4 V | - | 1.3 V |
| Quiescent Current | In ON mode | 0.5 mA | 1 mA | 2 mA |
| Quiescent Current | In OFF mode | 50 µA | - | 120 µA |
| Line Regulation | Voltage change with input voltage | 5 mV | - | 25 mV |
| Load Regulation | Voltage change with load current | 5 mV | - | 25 mV |
| Supply Voltage Rejection | At 120 Hz, 1 kHz, 10 kHz | 76 dB, 71 dB, 60 dB | - | - |
| Output Noise Voltage | 10 Hz to 100 kHz | - | - | 50 µV |
| Operating Temperature Range | - | -40°C | - | 125°C |
| Package | - | - | - | DPAK (TO-252-3) |
Key Features
- Very Low Dropout Voltage: 0.45 V, making it suitable for low voltage applications.
- Low Quiescent Current: Typical 50 µA in OFF mode and 500 µA in ON mode, ideal for battery-powered systems.
- High Output Current: Up to 500 mA.
- Logic-Controlled Electronic Shutdown: Allows for easy control of the regulator.
- Internal Current and Thermal Limit: Provides protection against overcurrent and overheating.
- Low Output Noise: 50 µV from 10 Hz to 100 kHz.
- High Supply Voltage Rejection: Up to 76 dB at 120 Hz.
- Wide Operating Temperature Range: -40°C to 125°C.
- Automotive Grade Availability: Qualified according to AEC-Q100 standards.
Applications
The LF50ABDT-TR is particularly suited for a variety of applications, including:
- Battery-Powered Systems: Due to its low quiescent current and low dropout voltage, it is ideal for extending battery life.
- Low Noise and Low Power Applications: Such as audio equipment, medical devices, and other sensitive electronic systems.
- Automotive Systems: Qualified to AEC-Q100 standards, making it suitable for automotive electronics.
- Industrial and Consumer Electronics: Where stable and efficient voltage regulation is required.
Q & A
- What is the output voltage of the LF50ABDT-TR?
The output voltage is fixed at 5V.
- What is the maximum output current of the LF50ABDT-TR?
The maximum output current is 500 mA.
- What is the input voltage range for the LF50ABDT-TR?
The input voltage range is from 6 V to 16 V.
- What is the dropout voltage of the LF50ABDT-TR?
The dropout voltage is typically 0.45 V, with a maximum of 1.3 V at 500 mA output current.
- What is the quiescent current in ON and OFF modes?
In ON mode, the quiescent current is typically 1 mA, and in OFF mode, it is typically 50 µA.
- What is the operating temperature range of the LF50ABDT-TR?
The operating temperature range is from -40°C to 125°C.
- What package type is the LF50ABDT-TR available in?
The LF50ABDT-TR is available in a DPAK (TO-252-3) surface mount package.
- Is the LF50ABDT-TR suitable for automotive applications?
- What are the key features that make the LF50ABDT-TR suitable for low noise applications?
The very low dropout voltage, low quiescent current, and low output noise make it suitable for low noise applications.
- What is the supply voltage rejection of the LF50ABDT-TR?
The supply voltage rejection is up to 76 dB at 120 Hz.
