BA17818CP-E2

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BA17818CP-E2 is a linear voltage regulator. It is a three-terminal regulator of low dropout voltage type designed for higher MCU performance in comparison to the conventional fixed voltage regulator. This voltage regulator offers a wide selection of adjustable output voltage levels between 2.85V and 5.5V, with a maximum output current of 1A.

This voltage regulator is specifically suitable for applications requiring low noise and ripple. The device is rated at +2.5V to +5.5V Input Voltage and its maximum output power is 6W. An adjustable version of this voltage regulator is also available, which has a voltage-control pin and can be programmed to outputs between 2.5V and 6.5V.

The device features good line regulation, temperature stability, and ripple rejection. Additionally, it includes protection features such as a current limit, over temperature protection, and reverse current. It has an onboard mute control pin and can provide fast turn-on and turn-off performance.

The BA17818CP-E2 is an ideal choice for automotive, consumer, industrial and communication applications. It is designed for applications with low noise and ripple, such as mobile/cellular phones, PDA’s, tablet PCs and portable electronic devices. Additionally, it is suitable for notebook and household appliances, such as DVD players, game consoles and TV sets, among other products and purposes.

The physical dimensions of this voltage regulator are 5mm x 3mm x 1.2mm, and it is available in a DPAK package with a maximum power dissipation of 6W. Its junction temperature range is -55°C to +150°C, with a storage temperature range at -55°C to +125°C.

The working principle behind the BA17818CP-E2 is that it takes in DC voltage through the input pins and converts it to a suitable, as per the application, regulated voltage output. It uses a pass transistor as an active element of the output stage, along with two resistors configured as a voltage divider. This voltage divider provides a reference voltage of 1.25V, which is then compared with the given voltage selected at the feedback pin of the IC. The device starts regulating the output voltage, when the input voltage exceeds the feedback voltage setting. The output voltage is compared against the reference voltage, and any variation in the output voltage is corrected by increasing or decreasing the base current on the pass transistor, thus intermittently adjusting the output voltage.

The BA17818CP-E2 is further equipped with a current limit circuit, which uses a constant voltage current source. When the load current exceeds the set limit, the voltage at the junction of the two resistors starts to increase, which triggers the over current circuit and acts as a shut down function for the device. This voltage regulator is also designed with an over temperature protection (OTP) circuit, an overvoltage protection (OVP) circuit, and reverse current protection, which ensure safe and reliable operations of the circuit.

In conclusion, the BA17818CP-E2 is an ideal linear voltage regulator for applications requiring low-voltage, low-noise, low-ripple and with extraneous protection options. It offers adjustable output voltage levels along with a protective circuitry and wide operating temperature range. It is known for optimal performance and low power dissipation, making it suitable for a wide range of applications.

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