Overview
The LF50CV, produced by STMicroelectronics, is a very low-dropout voltage regulator designed to provide stable and efficient voltage regulation in a variety of applications. This regulator is part of the LF50 series, known for its high performance and reliability. The LF50CV is particularly suited for systems requiring low noise, high accuracy, and a wide operating temperature range.
Key Specifications
| Parameter | Test Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | IO = 50 mA, VI = 7 V, Ta = 25 °C | 4.9 | 5 | 5.1 | V |
| Operating Input Voltage (VI) | IO = 500 mA | 6 | - | 16 | V |
| Output Current Limit (IO) | Ta = 25 °C | - | - | 1 A | A |
| Line Regulation (∆VO) | VI = 6 to 16 V, IO = 5 mA | 5 | - | 25 mV | mV |
| Load Regulation (∆VO) | VI = 6.3 V, IO = 5 to 500 mA | 5 | - | 25 mV | mV |
| Quiescent Current (Id) | VI = 6 to 16 V, IO = 0 mA, ON mode | 0.5 | 1 | 1 mA | mA |
| Quiescent Current (Id) | VI = 6 V, OFF mode | 50 | - | 100 µA | µA |
| Dropout Voltage (Vd) | IO = 200 mA | 0.2 | - | 0.35 V | V |
| Control Input Logic Low (VIL) | Ta = -40 to 125 °C | 0.8 | - | - | V |
| Control Input Logic High (VIH) | Ta = -40 to 125 °C | - | - | 2 V | V |
| Output Bypass Capacitance (CO) | ESR = 0.1 to 10 Ω, IO = 0 to 500 mA | 2 | - | 10 µF | µF |
Key Features
- Very Low Dropout Voltage: The LF50CV features a very low dropout voltage, typically 0.2 to 0.35 V at 200 mA and 0.4 to 0.7 V at 500 mA, ensuring minimal voltage loss.
- Low Quiescent Current: It has a low quiescent current of 0.5 to 1 mA in ON mode and 50 to 100 µA in OFF mode, making it power-efficient.
- High Output Current: The regulator can supply up to 500 mA of output current.
- High Accuracy: The output voltage is highly accurate with a line regulation of 5 to 25 mV and load regulation of 5 to 25 mV.
- Wide Operating Temperature Range: It operates over a temperature range of -40 to 125 °C, making it suitable for various environmental conditions.
- Low Noise: The regulator has a low output noise voltage of 50 µV (10 Hz to 100 kHz) and high supply voltage rejection ratio.
Applications
- Automotive Systems: The LF50CV is suitable for automotive applications due to its high reliability and wide operating temperature range.
- Industrial Control Systems: It can be used in industrial control systems where stable and accurate voltage regulation is crucial.
- Consumer Electronics: This regulator is also applicable in consumer electronics such as audio equipment, medical devices, and other portable electronics.
- Telecommunication Equipment: It can be used in telecommunication equipment where low noise and high accuracy are required.
Q & A
- What is the typical dropout voltage of the LF50CV?
The typical dropout voltage of the LF50CV is 0.2 to 0.35 V at 200 mA and 0.4 to 0.7 V at 500 mA.
- What is the maximum output current of the LF50CV?
The maximum output current of the LF50CV is 500 mA.
- What is the operating input voltage range of the LF50CV?
The operating input voltage range of the LF50CV is from 6 to 16 V.
- What is the quiescent current in ON and OFF modes?
In ON mode, the quiescent current is 0.5 to 1 mA, and in OFF mode, it is 50 to 100 µA.
- What is the line regulation of the LF50CV?
The line regulation of the LF50CV is 5 to 25 mV.
- What is the load regulation of the LF50CV?
The load regulation of the LF50CV is 5 to 25 mV.
- What is the output noise voltage of the LF50CV?
The output noise voltage of the LF50CV is 50 µV (10 Hz to 100 kHz).
- What is the control input logic low and high voltage?
The control input logic low voltage is 0.8 V, and the control input logic high voltage is 2 V.
- What is the recommended output bypass capacitance?
The recommended output bypass capacitance is 2 to 10 µF with an ESR of 0.1 to 10 Ω.
- What is the operating temperature range of the LF50CV?
The operating temperature range of the LF50CV is -40 to 125 °C.
