AP2120N-1.5TRG1

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Linear voltage regulators are integrated circuits (ICs) used to provide a regulated voltage supply to components in a system, such as MCUs or integrated circuits. The AP2120N-1.5TRG1 is a Linear voltage regulator from Diodes Incorporated that is widely used in various applications due to its rugged features. This article will provide information on the various applications and working principles of this device.

The AP2120N-1.5TRG1 is a Dual Low Dropout (LDO) regulator with an integrated power switching function, specifically designed for mobile phone baseband processor and cellular RF power amplifier applications. It has an integrated dual channel N-channel MOSFET buck switch suitable for LCD bias or power sequencing and also provides a low-dropout standby/shutdown mode with a mid-rail voltage reference. The AP2120N-1.5TRG1 also provides high power efficiency, improved thermal performance and enhanced EMI immunity.

The AP2120N-1.5TRG1 provides 2 highly accurate and low-noise LDOs of 1.5A and 2.5A, respectively, to supply different voltages to various components and handheld applications. Both LDOs can be enabled and disabled with an external logic control from the MCU. The internal 1.8V mid-rail reference is also available for level shifting, charging and supervisory applications. This device is offered in both a QFN-16 and MSOP-8 package to provide a compact solution for handheld applications.

The AP2120N-1.5TRG1 offers several applications for mobile phones, such as baseband processor, radio frequency (RF) power, and modem power applications. It can be used in power sequencing, supervisory, and level shifting applications. It provides a total supply current of up to 2.5A and is compliant to the most stringent circuit protection requirements. The dual switching Buck LDO, 1.5A and 2.5A, allows low dropout operation and low-noise power delivery.

The AP2120N-1.5TRG1 operates in two major modes based on the voltage threshold of the Enable pin. When the voltage on the Enable pin is above 2.2V, the Buck loop is enabled and both the Buck and the LDO loops are enabled simultaneously. When the voltage on the Enable pin is below 2.2V, the Buck loop is disabled and the 1.5A LDO operates by default. The standby current consumption is reduced to 0.1μA typical in shutdown mode and the device functions as a linear regulator.

The AP2120N-1.5TRG1 also provides protection against over-voltage and over-current. Over-voltage protection comes as built-in circuit protection while over-current protection is external. This device also has a short-circuit protection, which is enabled by default. The protection circuits will shut down both the Buck and LDO loops in the event of an over-voltage, over-current, or short-circuit condition.

In conclusion, the AP2120N-1.5TRG1 linear voltage regulator is an integrated power management solution for mobile phone applications. It features a dual-channel N-channel MOSFET Buck switch, low-dropout standby/shutdown mode, and 1.8V mid-rail reference. It provides a total supply current of up to 2.5A and is also offered in both a QFN-16 and MSOP-8 packages. This device offers a variety of applications, including power sequencing, supervisory, and level shifting applications. It also provides protection against over-voltage and over-current conditions. The AP2120N-1.5TRG1 linear voltage regulator is a reliable power management solution for mobile phone baseband processors and other ICs.

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