AP2139AK-2.8TRG1

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PMIC stands for Power Management IC and Voltage Regulators for Linear PMICs are designed to provide a steady voltage regardless of input voltage or current fluctuations. AP2139AK-2.8TRG1 is a Linear PMIC from Diodes Incorporated which offers an adjustable output voltage from 0.8 V to 5.0 V. This article aims to discuss the application fields and working principles of AP2139AK-2.8TRG1.

Applications of AP2139AK-2.8TRG1

The AP2139AK-2.8TRG1 can be used in a wide range of applications such as portable devices, smartphones, digital cameras, as well as in industrial and automotive electronics. The 150 mA of continuous output current is powerful enough to supply the core of many embedded systems. The device is widely used in applications such as:

• Networking equipment
• DVRs and game consoles
• Radios and television receivers
• Data storage and retrieval apparatus
• Portable audio players and cameras
• Telecommunication apparatus
• Medical imaging and diagnostics
• Industrial electronics
• Automotive systems

Working Principle of AP2139AK-2.8TRG1

The AP2139AK-2.8TRG1 is a step-down voltage regulator, installed in the voltage regulator circuit to reduce the input voltage and provides a steady output voltage. The device works based on the Boost-buck topology, which can operate both in the buck or boost mode. The device can be used as a stand-alone linear voltage regulator with an adjustable output current up to 150mA, or an adjustable voltage divider with an adjustable output voltage up to 5V.

The AP2139AK-2.8TRG1 uses a combination of high speed MOSFETs, inductors and control circuitry to provide a steady output voltage. The device is capable of providing fast transient response and high efficiency up to 85%. The device operates in PFM (pulse frequency modulation) mode during the light-load conditions and switches to PWM (pulse width modulation) mode during the higher load current conditions. Also, the device includes soft start and thermal protection features.

Conclusion

The AP2139AK-2.8TRG1 is a linear voltage regulator designed for various applications. It can be used as a stand-alone regulator and supports up to 150mA output current. The device is based on the Boost-buck topology and consists of high speed MOSFETs, inductors and control circuitry. The device operates in PFM mode during the light load conditions and PWM mode during the higher load current conditions.

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