LTC3850EUF#TRPBF

Frequency - Switching:	250kHz ~ 780kHz
Base Part Number:	LTC3850
Supplier Device Package:	28-QFN (4x4)
Package / Case:	28-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	97.2%
Series:	--
Voltage - Supply (Vcc/Vdd):	4 V ~ 24 V
Output Phases:	2
Number of Outputs:	2
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Analysis of LTC3850EUF#TRPBF application field and working principle

PMIC (Power Management IC) technology is widely used in electronics owing to its numerous advantages. DC DC switching controllers are one of the most commonly used components in several circuits, such as Buck Boost converters, Flyback converters, SEPIC converters and so on. Intel\'s LTC3850EUF#TRPBF series is one of the many adaptable DC DC switching controllers used for battery-powered, wall-mounted and utility-power-supplied loads. In this article, let us look into the application field and the working principle of LTC3850EUF#TRPBF.

Application Field

LTC3850EUF#TRPBF is an advanced analog synchronous step-down switching regulator IC, capable of supporting up to 6A output current. It utilizes Intel\'s advanced current mode control algorithm, as well as clockless operations, making it ideal for power supplies, microcontrollers, FPGAs and other sensitive electronic components.The IC\'s input supply range from 6V to 25V, making it suitable for wall-mounted and utility-power-supplied loads. It has a variable switching frequency which allows for better control of EMI, as well as versatile power supplies for computing and telecommunication applications. The LTC3850EUF#TRPBF also supports an I2C/SMBus with dynamic input and output for ease of programming.

Working Principle

The working principle of LTC3850EUF#TRPBF can be explained using Buck converter as an example. Buck converters are commonly used in power supplies, especially in high-performance applications. The DC-DC switch controller converts the input DC supply to the desired output by controlling the power switch elements. The output voltage and current are achieving this by controlling a switch element, namely a switch transistor, in a topology called buck-boost. By controlling the switch element in different ways, the output voltage and current are changed accordingly. This is achieved by controlling the conduction time of the switch element.The LTC3850EUF#TRPBF uses advanced current mode control algorithm to provide a fast and accurate step-down operation plus its clockless operation helps to reduce EMI and noise emissions. The controller also uses fast, sliding-frequency control to maintain a high minimum frequency and eliminate large increases in output capacitance to reduce external component count.The LTC3850EUF#TRPBF can be used to produce the desired output voltage based on the input voltage, current and desired output voltage. The controller uses a voltage feedback loop and a current sense amplifier to measure the output voltage and the output current. It also uses an external power switch element and a loop compensation for optimal operation.

Conclusion

Intel\'s LTC3850EUF#TRPBF is a powerful and adaptive DC-DC switching controller which is suitable for battery-powered, wall-mounted and utility-power- supplied loads. It offers efficient and reliable power conversion, with its intelligent current mode control algorithm and clockless operation. The controller is ideal for use in power supplies, microcontrollers, FPGAs and other sensitive electronic components.

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