LM5166XDRCT

Voltage - Input (Max):	65V
Supplier Device Package:	10-VSON (3x3)
Package / Case:	10-VFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 150°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	50kHz ~ 600kHz
Current - Output:	500mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	5V
Series:	--
Voltage - Input (Min):	3V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to LM5166XDRCT Applications and Working Principles The LM5166XDRCT is a DC-DC switching regulator with an adjustable switching frequency and current limiting, providing a robust and cost-effective solution for point-of-load (POL) and intermediate bus regulation. This switching regulator can operate within a wide input voltage range while delivering up to 10A of output current with a very low output ripple and high efficiency. The LM5166XDRCT is designed in such a way that it can be used in a variety of applications, ranging from telecom and computer power systems to automotive power supplies and point-of-load regulation. By enabling adjustable switching frequency and current limiting, this switching regulator helps to enhance system efficiency, performance and reliability. LM5166XDRCT TopologyThe LM5166XDRCT is a buck (step-down) type DC-DC switching regulator topology. The device features high accuracy current limit and adjustable switching frequency for better system design flexibility. It operates with a wide input voltage range of +4.5V to +36V and delivers up to 10A continuous output current with ±3% total output regulation. The device utilizes integrated PWM control and supports low output ripple, high output current density and high efficiency. LM5166XDRCT Operating PrinciplesThe basic operation principle of the LM5166XDRCT is constant-on-time (COT) control. The COT control was developed to provide a fast response to changes in input supply voltage or output load current, while limiting the maximum duty cycle to a defined value. This feature helps the LM5166XDRCT to achieve high efficiency, even at light loads, with a low minimum on-time. When the input supply voltage rises, the COT control reduces the output voltage in a stabilized way and maintains it within the acceptable range. It decreases the switching frequency during constant load conditions, thus ensuring high efficiency over a wide range of outputs. The integrated PWM control circuitry limits the peak switch current to its programmed level, providing protection for the load. LM5166XDRCT ApplicationsThe LM5166XDRCT is an ideal solution for point-of-load (POL) and intermediate bus voltage regulation applications. It is designed to provide high efficiency and fast transient performance in telecom, computers and automotive power supply applications. The device can also be used in high power density general-purpose power supplies. The LM5166XDRCT is useful for applications such as server and storage systems, DC-DC conversion in distributed power architectures, onboard DC-DC bus conversion, computer power systems and automotive power systems. This switching regulator can provide a constant voltage output over a wide input voltage range, and its adjustable current limit and switching frequency make it an ideal solution for applications where system efficiency, load current accuracy and output noise are important. ConclusionThe LM5166XDRCT is a cost-effective and robust solution for point-of-load and intermediate bus regulation. With its wide input voltage range, high output current and low ripple, it is suitable for a variety of applications in the telecommunication, automotive and computer power system industry. The adjustable current limit and switching frequency enable high efficiency, performance and reliability.

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