BD25KA5FP-E2

The BD25KA5FP-E2 is an adjustable, low dropout (LDO), linear voltage regulator, designed and manufactured by ROHM semiconductor specifically for applications which require highly accurate and efficient voltage regulation. In addition to its very low dropout voltage (typically 0.33 V @ 2.5 A) and ultra-low quiescent current (IQ; typically 40uA), the device delivers excellent line and load transient responses along with noise suppression making it an ideal choice for advanced digital designs, particularly in demanding portable applications such as mobile phones, digital cameras, and PDAs.

The BD25KA5FP-E2 has a built-in oscillator that provides the user with a fixed frequency oscillator to ensure stability in applications implementing the device in the form of a feedback loop, such as step-down or buck converter. The oscillator circuit is designed to shut off in the event of an overcurrent or over-temperature protection. It has a wide input voltage range (2.2V-8.0V) providing a wide range of design flexibility.

The BD25KA5FP-E2 offers thermal cycling control with both shutdown and soft start functions. The current limit on the device prevents it from entering a latch-up state, while the over-temperature protection prevents IC temperature from exceeding the specified limit. The BD25KA5FP-E2 also has an adjustable output voltage range (1.2V to 5.25V) to ensure flexibility for various design scenarios.

The working principle of the device is based on the principle of linear voltage regulation. Linear regulators are used in power supplies and other power management applications to provide a constant output voltage regardless of changes in the supply voltage or load current. The regulator essentially acts like a variable resistor, changing its resistance to keep the output voltage constant, no matter what its input or load conditions are. It does this by comparing the output voltage to a reference voltage and automatically adjusting its resistance to bring the output voltage back to the desired level.

The BD25KA5FP-E2 uses a Power MOSFET in a feedback loop to regulate the voltage. The MOSFET is switched on and off in a pulse width modulation (PWM) scheme to control the output voltage. It has a low dropout voltage and is suitable for applications which require high efficiency and high power density. The device also features an adjustable PWM frequency which can be set to optimize the performance of the loop. The maximum output current that can be obtained is 2.5 A.

The BD25KA5FP-E2 is an excellent choice for applications requiring high power and accuracy, such as in modern digital devices. Its adjustable output voltage, low dropout voltage and ultra-low quiescent current allow designers to design efficient power supplies with improved power output and low noise. Its wide input voltage range and thermal cycling control make it suitable for portable devices and other design scenarios requiring temperature stability.