Overview
The STMicroelectronics KF33BDT-TR is a low dropout voltage regulator (LDO) from the KF series, designed to provide a stable 3.3V output voltage with a maximum current of 500mA. This regulator is housed in a TO-252-3 (DPAK) package and is suitable for a wide range of applications, particularly in low noise, low power systems and battery-powered devices. The KF33BDT-TR features a very low dropout voltage, low quiescent current, and internal current and thermal limiting, making it an efficient choice for various electronic designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage - Max | 20 | V |
| Output Voltage Fixed | 3.3 | V |
| Dropout Voltage - Max | 0.7 | V |
| Output Current - Max | 500 | mA |
| Tolerance (%) | ±2% | |
| Operating Temp Range | -40°C to +125°C | |
| Regulator Topology | Fixed | |
| Quiescent Current | 12mA | |
| No. of Outputs | Single | |
| Output Noise | 50µV | |
| Load Regulation | 50mV | |
| Current - Limit | 1A | |
| Line Regulation | 12mV | |
| Package Style | TO-252-3 (DPAK) | |
| Mounting Method | Surface Mount |
Key Features
- Very Low Dropout Voltage: The KF33BDT-TR has a very low dropout voltage of 0.4V to 0.7V, making it suitable for applications where minimal voltage loss is critical.
- Low Quiescent Current: The regulator features a low quiescent current of 12mA in ON mode and 50µA in OFF mode, which is beneficial for power-saving designs.
- High Output Current: It can supply up to 500mA of output current, making it versatile for various applications.
- Logic-Controlled Electronic Shutdown: The device includes a shutdown logic control function, allowing for the regulation of power consumption by putting parts of the board into standby mode.
- Internal Current and Thermal Limiting: The regulator has built-in current and thermal limiting, ensuring safe operation under various conditions.
- Low Output Noise: The output noise voltage is as low as 50µV, which is crucial for noise-sensitive applications.
- Compact Package: The TO-252-3 (DPAK) package is compact and suitable for surface mount applications, saving space on the PCB.
Applications
- Battery-Powered Devices: The low dropout voltage and low quiescent current make this regulator ideal for battery-powered devices where power efficiency is crucial.
- Low Noise Systems: The low output noise makes it suitable for applications requiring minimal noise, such as audio equipment and medical devices.
- Industrial Automation: It can be used in industrial automation systems where stable voltage regulation is necessary.
- Consumer Electronics: The regulator is also applicable in consumer electronics such as smartphones, tablets, and other portable devices.
- Automotive Systems: The wide operating temperature range (-40°C to +125°C) makes it suitable for automotive applications.
Q & A
- What is the maximum input voltage for the KF33BDT-TR?
The maximum input voltage is 20V.
- What is the fixed output voltage of the KF33BDT-TR?
The fixed output voltage is 3.3V.
- What is the maximum dropout voltage for the KF33BDT-TR?
The maximum dropout voltage is 0.7V.
- What is the maximum output current of the KF33BDT-TR?
The maximum output current is 500mA.
- What is the operating temperature range for the KF33BDT-TR?
The operating temperature range is -40°C to +125°C.
- What is the quiescent current of the KF33BDT-TR in ON mode?
The quiescent current in ON mode is typically 12mA.
- Does the KF33BDT-TR have internal current and thermal limiting?
Yes, it has built-in current and thermal limiting.
- What is the package style of the KF33BDT-TR?
The package style is TO-252-3 (DPAK).
- What is the mounting method for the KF33BDT-TR?
The mounting method is surface mount.
- What is the typical output noise voltage of the KF33BDT-TR?
The typical output noise voltage is 50µV.
