FAN2518S26X

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PMIC - Voltage Regulators - Linear

The FAN2518S26X is a low dropout linear regulator designed specifically to provide a regulated output voltage of 2.6V to the peripheral circuits. The device provides excellent load and line regulation while minimizing power losses and quiescent current. It is an ideal device for applications where an extremely low dropout voltage is required and a wide input voltage range is needed.

Features

• Wide input voltage range: 2.8V to 5.5V
• Output current up to 300mA
• Low dropout voltage, 1.25V at full load
• Ultra high PSRR, 97dB
• High output accuracy, 0.8%
• Low quiescent current, 35µA
• Overcurrent protection
• Current foldback protection

Overview

The FAN2518S26X is a high performance linear regulator designed to provide a regulated 2.6V output over a wide 2.8V to 5.5V input voltage range. It has an extremely low dropout voltage which allows the device to maintain a regulated output voltage even at very low input voltages. The device output has an accuracy of 0.8%, and is capable of supplying up to 300mA output current at a maximum dropout voltage of 1.25V at full load.

The regulator includes overcurrent protection, and it is capable of managing large inrush currents. The device features an ultra-high PSRR and very low quiescent current, resulting in low noise operation. The device is particularly suited for battery-powered applications, where an extremely low dropout voltage is required and a wide input voltage range is needed.

Applications

• Portable devices powered by batteries
• DC to DC converters
• Mobile phones
• PDAs
• MP3 Players
• Digital cameras
• GPS systems

Working Principle

The FAN2518S26X is a low dropout linear regulator that works by regulating the negative feedback of a reference circuit with a regulating transistor to maintain a constant output voltage. The internal reference voltage is an accuracy of 0.8%, making the output voltage very accurate and stable. The device has two main operating modes: quiescent current mode and power down mode.

In quiescent current mode, the regulating transistor is used to regulate the negative feedback of the reference circuit. This creates a stable output voltage. The low quiescent current allows the device to maintain the output voltage over a wide input voltage range. The quiescent current is also low enough to maintain the output voltage without draining the battery when the device is in idle mode. The ultra-high PSRR of the device also allows it to maintain low output noise and stable output voltage even in noisy environments.

In power down mode, the regulating transistor is turned off, thus cutting off the power to the output. The device will operate in this mode to conserve power when the device is not in use. This mode also allows the device to quickly enter sleep mode, making the device ideal for battery powered applications.

The FAN2518S26X is a high performance and efficient low dropout linear regulator. It is ideal for applications where an extremely low dropout voltage is required and a wide input voltage range is needed. The device provides excellent load and line regulation while minimizing power losses, and it provides a regulated 2.6V output over a wide 2.8V to 5.5V input voltage range. It also has an extremely low quiescent current and ultra-high PSRR, making it an excellent choice for a variety of battery powered applications.

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