FAN1086M25X

Voltage Dropout (Max):	1.5V @ 1.5A
Base Part Number:	FAN1086
Supplier Device Package:	TO-263-3
Package / Case:	TO-263-4, D²Pak (3 Leads + Tab), TO-263AA
Mounting Type:	Surface Mount
Operating Temperature:	25°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	72dB (120Hz)
Current - Output:	1.5A
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.5V
Voltage - Input (Max):	7.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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FAN1086M25X Application Field and Working Principle

The FAN1086M25X are low-input quiescent current, low-dropout (LDO) regulators featuring a single output of 1A. They have an internal 0.8V reference voltage, adjustable output voltage and a high precision current limit. They are offered in a wide range of output voltages. FAN1086M25X also supports both PWM and pulse-width modulation (PWM) modes with an adjustable frequency for operation.

Features

The FAN1086M25X series of LDO regulators have some notable features, such as:

- Low-Input Quiescent Current (IQ): The FAN1086M25X draws only 25μA (typ) at light load conditions making it ideal for battery powered applications.

- Low-Dropout Voltage (VDROP): The FAN1086M25X offers a low VDROP of 130mV at a load current of 1A. This makes it suitable for powering low voltage systems.

- High Gain Bandwidth Product (GBW): The FAN1086M25X offers high gain-bandwidth product of up to 1MHz, providing fast transient response to varying load conditions.

- PWM Pulse Modulation: The FAN1086M25X supports both PWM and pulse-width modulation (PWM) modes with an adjustable frequency for operation.

- High Precision Current Limit: The FAN1086M25X has a high precision current limit of 1A that can be used to prevent any over-current conditions.

- Internal 0.8V Reference Voltage: The FAN1086M25X has an internal 0.8V reference voltage for precise and stable voltage regulation.

Applications

The FAN1086M25X is ideally suited to a wide variety of applications, such as:

- Portable/Cordless Device: The FAN1086M25X is ideal for portable and cordless devices such as smartphones, tablets, laptops, and other handheld equipment as they need low-power consumption regulators. With its high gain-bandwidth product of 1MHz, the FAN1086M25X is capable of responding quickly to changes in load conditions for improved system performance.

- Automotive: The FAN1086M25X is suitable for use in automotive applications. It supports both PWM and pulse-width modulation modes with an adjustable frequency for operation, and its low-input quiescent current of only 25μA (typ) makes it perfect for battery powered applications.

- Industrial: The FAN1086M25X is suitable for use in industrial applications due to its high current limit of 1A. It has an adjustable output voltage to ensure precise voltage regulation, while its internal 0.8V reference voltage helps to ensure stable voltage regulation.

Working Principle

The FAN1086M25X is a limitation voltage regulator with a dropout voltage of 130mV, which is designed to maintain the output voltage within a certain range. The working principle of the FAN1086M25X is based on the following four step process:

- Step 1: Input Voltage sense: The FAN1086M25X senses the input voltage supply and adjusts the voltage dropout so that it does not exceed 130mV.

- Step 2: Error Amplifier: The output error amplifier monitors the output voltage and compares it to the reference voltage. When the voltage difference between them exceeds a certain threshold, the error amplifier increases the output voltage to bring it back in line with the reference voltage.

- Step 3: Reference Voltage: The reference voltage is set by an internal 0.8V reference voltage within the FAN1086M25X. This reference voltage is used as a reference point when monitoring the output voltage.

- Step 4: Output MOSFET: The output MOSFET is based on the output voltage that is set by the error amplifier. It controls the amount of current passing through the regulator and maintains the output voltage at the desired level.

Conclusion

In conclusion, the FAN1086M25X series of low-input quiescent current, low-dropout (LDO) regulators are designed for battery powered applications and feature an adjustable output voltage and a high precision current limit. It has an internal 0.8V reference voltage for precise and stable voltage regulation, and supports both PWM and pulse-width modulation (PWM) modes with an adjustable frequency for operation. The FAN1086M25X is ideally suited for applications such as portable/cordless devices, automotive, and industrial.

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