AOZ1022PI

Voltage - Input (Max):	18V
Supplier Device Package:	8-SO-EP
Package / Case:	8-SOIC (0.154", 3.90mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	500kHz
Current - Output:	3A
Voltage - Output (Max):	18V
Voltage - Output (Min/Fixed):	0.8V
Series:	EZBuck™
Voltage - Input (Min):	4.5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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AOZ1022PI Application Field and Working Principle

The AOZ1022PI is a synchronous buck current-mode PWM (pulse-width modulation) controller designed to provide a regulated output voltage. It is categorized in the category of PMIC - Voltage Regulators - DC DC Switching Regulators. The AOZ1022PI is a highly efficient and low standby power consumption power conversion IC solution for a wide range of application fields, including automotive systems, server systems, notebook systems, mobile and consumer applications.

The AOZ1022PI consists of two main functional blocks, a regulator and a synchronous buck driver. The regulator is designed to provide a regulated output voltage with high precision and very low ripple and noise. The synchronous buck driver is designed to drive the synchronous low side MOSFET, optimizing the power conversion efficiency.

AOZ1022PI provides superior performance including high-speed transient response, quasi-simultaneous non-overlapped operation, 4A peak drive capability for the low-side MOSFET, soft start, power good output, under-voltage lockout, thermal limit and over-current protection. It also includes a special circuit for avalanche and current double protection to prevent destruction when the inductor current is too high. These features make the AOZ1022PI an ideal solution for a variety of applications including high power adapters, telecom power systems, DC-DC converters and industrial applications.

The AOZ1022PI working principle is based on the pulse-width modulation (PWM) technique. It works by switching the output voltage at a constant frequency, so that the average of the output voltage is proportional to the pulse width. This means that the output voltage can be accurately regulated within its voltage range. By varying the pulse width, the output current can be regulated too.

The AOZ1022PI features a low-side synchronous switch which provides better system efficiency and increased power density. This switching is synchronized to the bias of the MOSFET and the output capacitors, providing maximum power output, optimal power conversion efficiency and low ripple and noise. The primary benefit of this synchronous system is the improved power management and lower EMI levels.

The AOZ1022PI integrates over-temperature protection, under-voltage lock out, soft start, over-current protection and power good output. Over-temperature protection helps protect the device against thermal suffering, by suspending the switching operation until the temperature drops to a normal level. Under-voltage lock out prevents the circuit from working below a valid voltage level. Soft start prevents currents spikes associated with the start-up of the switching power conversion more slowly and variably. The over-current protection prevents damage the circuit when it is overloaded, by sensing the current in the circuit, and suspending the output as soon as it is overloaded. Finally, the power good output will inform the system of the power conditions at the output of the circuit.

The AOZ1022PI is a reliable and cost-effective solution for a wide range of power conversion applications. It delivers superior performance, high efficiency and low standby power consumption.

In summary, the AOZ1022PI is categorized in PMIC - Voltage Regulators - DC DC Switching Regulators. It is designed to provide a regulated output voltage with high precision and very low ripple and noise. It integrates a regulator and a synchronous buck driver. AOZ1022PI provides superior performance including high-speed transient response, quasi-simultaneous non-overlapped operation, 4A peak drive capability for the low-side MOSFET, soft start, power good output, under-voltage lockout, thermal limit and over-current protection. The AOZ1022PI working principle is based on the pulse-width modulation (PWM) technique. The primary benefit of this synchronous system is the improved power management and lower EMI levels.

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