ACT4523YH-T Integrated Circuits (ICs)

Voltage - Input (Max):	38V
Supplier Device Package:	8-SOP-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:	No
Frequency - Switching:	225kHz
Current - Output:	3A
Voltage - Output (Max):	12V
Voltage - Output (Min/Fixed):	0.808V
Series:	--
Voltage - Input (Min):	10V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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ACT4523YH-T Application Field and Working Principle

The ACT4523YH-T is an integrated pulse-width modulation (PWM) current mode DC-DC switching regulator that is designed for use in Point-of-Load (POL) converters. This device is suitable for use in applications where a high power-density, low component-count, high-efficiency solution is required. The ACT4523YH-T offers an integrated feature set which makes it highly suitable for DC-DC converters that require full load and overload protection, such as telecom and server power supplies, general industrial power supply circuits, laptop chargers, and automotive applications. The ACT4523YH-T offers multiple protection features to simplify the development of power circuits and ensure that the device is correctly protected and operated in the intended manner. These include over-current protection, over-temperature protection and under-voltage protection. Additionally, the device includes an advanced current sensing circuit which can accurately detect the real-time current limit of a system, and provide protection from over-current conditions. This feature ensures that the system is protected even in extreme operating conditions, such as during a short circuit. The ACT4523YH-T features a Pulse Width Modulation (PWM) current mode control architecture which allows for superior transient response and excellent line and load stability compared to traditional voltage mode control solutions. This is achieved through the implementation of an advanced error amplifier and adaptive frequency control, which allows the switching frequency to be automatically adjusted with load variations. This ensures that the output voltage is precisely regulated and actively monitored, and is ideal for handling dynamic loads.Additionally, the ACT4523YH-T features an integrated high-side power MOSFET and synchronous rectification, allowing for efficient operation over a wide load range. This switching regulator also includes two integrated reference voltages and two sense inputs that may be used in various circuit configurations to optimize performance. This provides the flexibility to design circuits which are both accurate and efficient.In summary, the ACT4523YH-T is an integrated pulse-width modulation (PWM) current mode DC-DC switching regulator that is ideal for use in Point-of-Load (POL) converters. The device is suitable for applications requiring a high power-density, low component-count, and high-efficiency solution including telecom and server power supplies, general industrial power supply circuits, laptop chargers, and automotive applications. It offers multiple protection features, PWM current mode control, high-side power MOSFET and synchronous rectification, and integrated reference voltages and sense inputs for improved performance.

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