BA17809FP-E2

BA17809FP-E2 application field and working principle

BA17809FP-E2 is a low-dropout regulator (LDO), Voltage Regulators - Linear, developed by the ROHM Japan. It is a single type low-dropout voltage regulator, with small package size. It is suitable for a small, economical device design that allows the output to be stabilized without the need for a large number of capacitors and other components. Additionally, it has an overvoltage protection circuit and an on/off switch that makes it ideal for a wide range of applications.

What is BA17809FP-E2?

BA17809FP-E2 is a low-dropout voltage regulator with a small package size. It is a ROHM Japan product and it is a single type low-dropout voltage regulator. It can regulate a single output voltage up to 2.8V, with a current range from 0.3A to 3A. It has a wide input voltage range and a low minimum operating voltage. A built-in current-limiting resistor reduces output current and eliminates the need for external current-limiting resistors. It also has high ripple rejection ratio with low power dissipation. The current-limiting resistor allows it to remain stable over temperature and time.

Features and Benefits of BA17809FP-E2

• Wide Input Voltage Range: The input voltage range of BA17809FP-E2 is between 4V and 20V, which makes it ideal for a wide range of applications.
• Low-Dropout Voltage and Low Power Consumption: The dropout voltage of BA17809FP-E2 is as low as 0.75V, so it can maintain a stable output voltage even at low input voltages. It also has a low power consumption, making it ideal for low-power applications.
• On/off Switch: The on/off switch allows the regulator to be enabled and disabled as needed, which is ideal for applications that require frequent status updates.
• Overvoltage Protection Circuit: The internal overvoltage protection circuit prevents damages and reduces current when the input voltage gets too high.
• Current-Limiting Resistor: The internal current-limiting resistor allows the regulator to remain stable over temperature and time, reducing the need for external components.

Applications of BA17809FP-E2

Because of its wide input voltage range, low-dropout voltage, and small package size, BA17809FP-E2 is ideal for a variety of different applications. Some of the most common applications include:

• Mobile Devices: BA17809FP-E2 can be used in mobile devices to regulate the input voltage, reducing any power losses and providing a stable output.
• LEDs: BA17809FP-E2 can be used in LED applications to maintain a constant output voltage, ensuring consistent brightness.
• Power Supplies: BA17809FP-E2 can be used in power supplies to provide a stable output voltage with minimal power losses.
• Automotive Applications: BA17809FP-E2 can be used in automotive applications to regulate the input voltage, reducing any power losses and providing a stable output voltage.

Working Principle of BA17809FP-E2

The working principle of BA17809FP-E2 is quite simple. It works by comparing the output voltage to a reference voltage and adjusting the output accordingly. The reference voltage is typically set at 2.8V, but it can be adjusted to between 0.2V and 3V by using an external resistor. When the output voltage exceeds the reference voltage, the regulator starts to reduce the output current. When the output voltage is lower than the reference voltage, the regulator starts to increase the output current. This continuous regulation ensures that the output voltage remains stable, even when the input voltage varies.

The internal current-limiting resistor helps to protect the regulator from overcurrent by limiting the maximum output current. In addition, it helps maintain stability over temperature and time. The overvoltage protection circuit is another feature that helps protect the device from the effects of an overvoltage. It reduces the output current when the input voltage is too high and prevents damage to the device.

Conclusion

The BA17809FP-E2 is a ROHM Japan product, a single type low-dropout voltage regulator suitable for a wide range of applications. It has wide input voltage range, low-dropout voltage and a low minimum operating voltage. Additionally, it has a high ripple rejection ratio, current-limiting resistor and overvoltage protection circuit. All of these features make it ideal for use in mobile devices, LED, power supply, and automotive applications.