Overview
The LF15ABDT-TR is a very low drop voltage regulator produced by STMicroelectronics. This component is part of the LFXX series, known for its low drop voltage and low quiescent current, making it highly suitable for low-noise, low-power applications, particularly in battery-powered systems. The regulator is available in various packages, including TO-220, TO-220FP, DPAK, and PPAK, and offers a range of output voltages. The LF15ABDT-TR specifically provides an output voltage of 1.5V and is designed to operate efficiently with minimal power consumption.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Voltage (VO) | 1.47 | 1.5 | 1.53 | V |
| Operating Input Voltage (VI) | 3 | - | 16 | V |
| Output Current (IO) | - | - | 500 | mA |
| Dropout Voltage (Vd) | 0.2 | - | 1.3 | V |
| Quiescent Current (Id) - ON mode | 0.5 | 1 | 2 | mA |
| Quiescent Current (Id) - OFF mode | 50 | - | 120 | µA |
| Line Regulation (∆VO) | 2 | - | 12 | mV |
| Load Regulation (∆VO) | 2 | - | 10 | mV |
| Supply Voltage Rejection (SVR) | 80 | - | - | dB |
| Operating Junction Temperature (TOP) | -40 | - | 125 | °C |
| Storage Temperature (TSTG) | -40 | - | 150 | °C |
Key Features
- Very low-dropout voltage (0.45 V): Ensures efficient operation with minimal voltage drop.
- Very low quiescent current (typ. 50 µA in OFF mode, 500 µA in ON mode): Ideal for low-power and battery-powered applications.
- Output current up to 500 mA: Supports a wide range of load requirements.
- Logic-controlled electronic shutdown: Allows for TTL-compatible shutdown control, enabling part of the board to be put in standby mode.
- Internal current and thermal limit: Provides built-in protection against overcurrent and overheating.
- Low output bypass capacitance requirement (2.2 µF): Saves board space and costs.
- Automotive grade availability: Qualified according to AEC-Q100 specifications for automotive applications.
- Wide temperature range (-40 °C to 125 °C): Suitable for various environmental conditions.
- High supply voltage rejection (80 dB typ.): Ensures stable output voltage despite input voltage variations.
Applications
The LF15ABDT-TR is particularly suited for low-noise, low-power applications, including:
- Battery-powered systems: Due to its low quiescent current and low dropout voltage, it is ideal for battery-powered devices.
- Automotive systems: Qualified to AEC-Q100 standards, it is suitable for automotive applications requiring high reliability and performance.
- Portable electronics: Its low power consumption and small footprint make it a good choice for portable electronic devices.
- Industrial control systems: It can be used in various industrial applications where low noise and high efficiency are required.
Q & A
- What is the typical dropout voltage of the LF15ABDT-TR?
The typical dropout voltage is 0.45 V.
- What is the maximum output current of the LF15ABDT-TR?
The maximum output current is 500 mA.
- What is the quiescent current in ON mode for the LF15ABDT-TR?
The quiescent current in ON mode is typically 500 µA.
- What is the operating input voltage range for the LF15ABDT-TR?
The operating input voltage range is from 3 V to 16 V.
- Does the LF15ABDT-TR have a shutdown control feature?
- What is the required output bypass capacitance for stability?
The required output bypass capacitance is only 2.2 µF.
- Is the LF15ABDT-TR suitable for automotive applications?
- What is the temperature range for the LF15ABDT-TR?
- What packages are available for the LF15ABDT-TR?
- What is the supply voltage rejection of the LF15ABDT-TR?
