AP2112K-2.5TRG1

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Linear voltage regulators are one of the most ubiquitous power management components found in modern circuits. They are designed to provide a steady output voltage, regardless of changes in input voltage, current, and temperature. The AP2112K-2.5TRG1 is a linear voltage regulator designed for low-dropout (LDO) applications. This device offers fast transient response and enables high levels of power supply accuracy and stability through an integrated on-chip voltage reference, internal voltage-scaling resistors, and a current limit circuit.

Features

The AP2112K-2.5TRG1 is a high-performance, 1A, low-dropout regulator with extra low-noise operation. This regulator includes several features to improve system performance and minimize solution costs, such as a low dropout voltage, fast transient response, integrated voltage reference, and current limit circuit.

• Output Voltage Range: 0.8V to 2.5V (2.5V preset)
• High Power Supply Ripple Rejection: > 94 dB
• Low Noise : <30 μV RMS
• Ultra Low Dropout Voltage : 80 mV
• Fast Transient Response : 2 µs

Applications

The AP2112K-2.5TRG1 is designed for a wide range of applications including high-performance, portable, and consumer electronics. This regulator is ideal for battery-powered systems, power supplies in mobile phones, tablet PCs, digital cameras, and other consumer electronics.

• Regulated power supplies
• Battery-powered systems
• Microprocessor-based systems
• Portable consumer electronics
• Digital cameras
• Tablet PCs
• Phones & other consumer electronics

Working principle

This device uses a PMOS to form a feedback loop to regulate the output voltage. The PMOS is connected to the input voltage, output voltage, and feedback input such that the output voltage is determined by the voltage reference. When an external load is placed on the regulator, the output voltage will drop. As the output voltage approaches the setpoint, the PMOS increases the gate voltage, which in turn increases the current flowing through the output. This process is repeated until the output voltage reaches or exceeds the setpoint.

The AP2112K-2.5TRG1 also includes protection circuitry to prevent damage to the device during short-circuiting, overloads, and overvoltage conditions. The current limit circuit regulates the maximum amount of current that can flow through the device and has an adjustable threshold of up to 1A. In the event of an overload, the current limit circuit will activate and reduce the output voltage. The built-in thermal shutdown circuit will activate if the temperature of the regulator exceeds 125°C and the device will not be able to operate until the junction temperature drops to a safe level.

In summary, the AP2112K-2.5TRG1 is a high-performance, low-dropout voltage regulator designed for a wide range of applications. This device offers high levels of power supply accuracy and stability, fast transient response, integrated voltage reference, and current limit circuit. Its features make it ideal for battery-powered systems, power supplies in mobile phones, tablet PCs, digital cameras, and other consumer electronics.

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