ACT4533CYH-T

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:	Yes
Frequency - Switching:	125kHz
Current - Output:	3.5A
Voltage - Output (Max):	18V
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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ACT4533CYH-T: DC DC Switching Regulators Application Fields and Working PrinciplesThe ACT4533CYH-T is a low voltage, step-down DC-DC converter and is part of the ACT4533 family of DC-DC switching regulators from Advanced Control Technologies (ACT). This DC-DC converter features adjustable output voltage from 0.8V to 6V and integrated current-mode control loop 250KHz ~900KHz PWM frequency feedback. The ACT4533CYH-T is specially designed to drive power -intensive load such as multiple processor cores on high-performance applications and can supply a continuous output current of up to 4.5A.Application fieldThe ACT4533CYH-T is an ideal choice for modern, high-end electronic products that demand low voltage power and high current capacity. It can be used in various industries such as telecommunications, computers, industrial, automotive, home appliances and medical. In the telecommunications industry, the ACT4533CYH-T can be used as the power source for Microprocessor-Based Telecom Network Systems, Short-Range Point-to-Point Radio Products, Wireless Routers and Access Points. In the computer industry, the ACT4533CYH-T can be used for PC motherboards, high-end servers, server storage systems, graphic cards and game consoles. In the industrial industry, the ACT4533CYH-T is a popular choice for industrial automation products, smart meters, LED lighting and CNC machines.In the automotive industry, the ACT4533CYH-T is a great choice for electric vehicles and automotive navigation systems. In the home appliance industry, the ACT4533CYH-T can be found powering flagship TV models, as well as washing machines and various other home appliances. In the medical industry, the ACT4533CYH-T is often used as the power source of various medical devices such as electric beds, infusion pumps and dialysis machines.Working principleThe ACT4533CYH-T is a DC-DC Converter based on a switch-mode design. It uses a continuous cycle of switching between power supplies (input and output) to provide a stable output voltage. The control loop for the converter operates in current-mode and allows for a wide range of operating frequencies from 250KHz to 900KHz.When the input voltage is higher than the output voltage, the high-side MOSFET is turned on and the inductor is energized with the input supply current. This causes a build-up of magnetic flux in the inductor, storing energy that is then released when the MOSFET turns off. The energy stored in the inductor is then transferred to the output stage through the low-side MOSFET. This process is repeated at high frequency, allowing current to continuously flow through the circuit and providing a constant output voltage.The control loop of the ACT4533CYH-T uses pulse-width modulation (PWM) to control its output voltage. The current-mode feedback loop seeks to maintain a constant current at the output which in turn allows the output voltage to stay within a certain range. The current-mode control loop also helps to reduce the ripple on the output, making the ACT4533CYH-T suitable for high-performance applications that require low output voltage noise.In short, the ACT4533CYH-T is a versatile, low-voltage, step-down DC-DC converter that is suitable for driving power-intensive loads such as multiple processor cores. It features adjustable output voltage from 0.8V to 6V and integrated current-mode control loop with a wide operating frequency range from 250KHz to 900KHz. Thanks to its robust design and high current capacity, it is a popular choice for many modern, high-end applications.

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