Overview
The KF50BDT-TR is a very low drop voltage regulator produced by STMicroelectronics. It is part of the KF series, known for its low dropout voltage and low quiescent current, making it highly suitable for low noise, low power applications, particularly in battery-powered systems. This regulator is available in the DPAK package and offers a range of features that enhance its performance and efficiency.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Voltage (VO) | 4.9 | 5 | 5.1 | V |
| Operating Input Voltage (VI) | - | - | 20 | V |
| Output Current (IO) | - | - | 500 mA | mA |
| Quiescent Current (Id) - ON Mode | 0.5 | 1 | - | mA |
| Quiescent Current (Id) - OFF Mode | 50 | 100 | - | µA |
| Dropout Voltage (Vd) at IO = 500 mA | 0.4 | - | 0.7 | V |
| Line Regulation (ΔVO) | 3 | - | 18 | mV |
| Load Regulation (ΔVO) | 2 | - | 50 | mV |
| Supply Voltage Rejection (SVR) | 76 | - | - | dB |
| Output Noise Voltage (eN) | - | 50 | - | µV |
| Operating Junction Temperature Range (TOP) | -40 | - | 125 | °C |
Key Features
- Very Low Dropout Voltage: 0.4 V at 500 mA output current.
- Low Quiescent Current: 50 µA in OFF mode and 500 µA in ON mode.
- High Output Current: Up to 500 mA.
- Logic-Controlled Electronic Shutdown: TTL-compatible shutdown logic control.
- Internal Current and Thermal Limit: Built-in protection against overcurrent and overheating.
- Low Output Bypass Capacitance: Only 2.2 µF required for stability.
- High Supply Voltage Rejection: Up to 76 dB at 120 Hz.
- Wide Operating Temperature Range: -40°C to 125°C.
Applications
- Battery-Powered Systems: Ideal for devices that require low power consumption and high efficiency.
- Low Noise Applications: Suitable for systems requiring minimal noise and high stability.
- Local Voltage Regulation: Can be used to regulate voltage locally on a PCB, reducing overall power consumption.
- Automotive and Industrial Systems: Robust enough to handle the temperature and voltage variations in these environments.
Q & A
- What is the maximum output current of the KF50BDT-TR?
The maximum output current is up to 500 mA.
- What is the dropout voltage at 500 mA output current?
The dropout voltage is 0.4 V to 0.7 V at 500 mA output current.
- What is the quiescent current in OFF mode?
The quiescent current in OFF mode is typically 50 µA.
- What is the operating junction temperature range?
The operating junction temperature range is -40°C to 125°C.
- What type of package is the KF50BDT-TR available in?
The KF50BDT-TR is available in the DPAK package.
- What is the supply voltage rejection at 120 Hz?
The supply voltage rejection at 120 Hz is typically 76 dB.
- How much output bypass capacitance is required for stability?
Only 2.2 µF of output bypass capacitance is required for stability.
- Is the KF50BDT-TR suitable for battery-powered systems?
Yes, it is highly suitable for battery-powered systems due to its low dropout voltage and low quiescent current.
- Does the KF50BDT-TR have built-in protection features?
Yes, it has internal current and thermal limit protection.
- What is the logic level for the shutdown control input?
The shutdown control input is TTL-compatible, with logic low at 0.8 V and logic high at 2 V.
