PQ015EZ5MZZH

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PQ015EZ5MZZH Application Field and Working Principle

The PQ015EZ5MZZH is a low-dropout reguator (LDO) linear voltage regulator (LVR) manufactured by NXP Semiconductor Inc. It is designed to meet the stringent requirements of next-generation consumer and computing products. The device offers a range of features that make it an ideal choice for applications requiring exceptionally low quiescent current (Iq) and low output voltage noise. The PQ015EZ5MZZH is categorized as a PMIC (power management integrated circuit or integrated circuit for manage power) and is among the Voltage Regulators family of linear voltage regulators (LVRs).

Features

• Ultra-low quiescent current: 1.0 μA maximum
• Output voltage: 0.8V to 4.2V adjustable
• Output current: 0.2A (3V output); 1A (2.8V output) maximum
• Dropout voltage: 0.2V typical (3V out), 0.35V maximum (3V out)
• Output noise: 19 μV RMS (100 Hz to 10 kHz)
• Temperature range: -40°C to +125°C

Application Field

The PQ015EZ5MZZH LVR deserves consideration for applications requiring low noise, ultra-low Iq, high efficiency, and wide temperature range operations. It typically finds applications in consumer and computing equipment such as cell phones, PDAs, portable media players, digital cameras, MP3 players and notebook computers. The device’s excellent electrical performance, flexibility and compact size also make it ideal for use in automotive applications.

Working Principle

The PQ015EZ5MZZH linear regulator works on the principle of linear “drop-out voltage” which is the voltage differential required to maintain regulation. It functions by providing an amplified voltage gain between the input and output of the regulator, and by maintaining a steady output voltage regardless of changes in input voltage as long as the input voltage is above the minimum operating requirement.

The dynamic automatic voltage scaling (AVS) of the PQ015EZ5MZZH ensures that the output voltage remains consistent cycling between the minimum and maximum power requirements, providing power delivery with no interruption to the application or device. To regulate voltage, the PQ015EZ5MZZH uses the inherent gain of its non-inverting amplifier and an internal reference voltage.

The amplifier is constructed from a series of transistors and an adjustable reference voltage. A resistor divider, which is placed in parallel with the amplifier, generates the output voltage that is automatically adjusted by the amplifier. The generated output voltage is the same as, or slightly above, the reference voltage that it was compared to. The regulator also uses voltage stabilization, current limiting, and thermal shutdown protection.

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