ADP3301ARZ-3-REEL application field and working principle

Introduction

The ADP3301ARZ-3-REEL is a low drop-out (LDO) linear voltage regulator that belongs to PMIC - Voltage Regulators - Linear product family. It is specified to operate over an operating temperature range of –40 °C to 85 °C and provides an output voltage of 3.3 V with a 0.07% line regulation and 1% load regulation. The device has a total regulator power dissipation of 1.2 W and the quiescent current is typical at a low value of 75 nA.

Application Fields

The ADP3301ARZ-3-REEL LDO linear voltage regulator offers a wide range of applications. It is mostly used in many applications such as mobile phones, digital cameras, music players, PDAs, and many other portable applications. All of these applications require low noise, micro-power performance that the ADP3301ARZ-3-REEL voltage regulator produces. Besides, it can be used in many other applications such as PCs, servers, printers, scopes, TVs, gaming, and embedded markets due to its low profile and low noise performance.

Features

The ADP3301ARZ-3-REEL LDO linear voltage regulator features a low drop-out voltage of only 0.2V , which makes it easy to use in portable power systems and ensure outputs are still stable even with a 3V input. The device also features shutdown current of only 0.1uA and integrated over-temperature protection. The over-temperature protection circuit protects the device by monitoring the die temperature and will shut down the output when it is exceeded. In addition, the device has short-circuit protection, as well as very good PSRR performance at both low and high frequencies.

Working Principle

The ADP3301ARZ-3-REEL LDO linear voltage regulator operates by using a simple linear regulator circuit. This regulator circuit is controlled by an internal voltage amplifier, which is programmed with a reference voltage. The reference voltage is set by a voltage divider configuration with two resistors, a fixed resistor and a feedback circuit. When the input and output voltages are similar, the amplifier is not activated and the device will provide a fixed voltage at the output. When the input voltage is higher, the amplifier is not able to supply enough current and so the output voltage will drop. With this combination, is possible to obtain high precision voltage levels.

Conclusion

The ADP3301ARZ-3-REEL is a low drop-out (LDO) linear voltage regulator with a wide range of applications, such as mobile phones, digital cameras, PDAs, PCs, servers and printers. It offers low noise and micro-power performance, a low drop-out voltage of 0.2V, a shutdown current of only 0.1uA and an integrated over-temperature protection circuit. The device operates using a simple linear regulator circuit, which is controlled by an internal voltage amplifier, programmed with a reference voltage.