LTC3860EUH#TRPBF

Frequency - Switching:	250kHz ~ 1.25MHz
Base Part Number:	LTC3860
Supplier Device Package:	32-QFN (5x5)
Package / Case:	32-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Current Limit, Enable, Frequency Control, Phase Control, Power Good, Soft Start, Tracking
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	No
Duty Cycle (Max):	91.5%
Series:	PolyPhase®
Voltage - Supply (Vcc/Vdd):	3 V ~ 5.5 V
Output Phases:	2
Number of Outputs:	2
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	PWM Signal
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LTC3860EUH#TRPBF Application Field and Working Principle

The LTC3860EUH#TRPBF is a synchronous step-down switching regulator controller from the PMIC - Voltage Regulators - DC DC Switching Controllers range. The controller is designed to provide up to 50A of output current, support a wide range of input voltage and output voltage, and support a wide range of switching frequencies. The LTC3860EUH#TRPBF is an ideal solution for driving high current applications, such as high power LED lighting, computing and industrial equipment and communications devices.The LTC3860EUH#TRPBF step-down switching regulator controller employs a current mode architecture, allowing it to rapidly respond to load current transients and changes. The controller also uses sense resistor current-sharing to allow up to 56V total input voltage. The LTC3860EUH#TRPBF also includes an error amplifier and a clock buffer, making it simple to adjust loop parameters and synchronize external clock sources.The LTC3860EUH#TRPBF operates from an input voltage range of 4.5V to 56V, with a minimum operating input voltage of 4.5V. The device has a wide PWM frequency range from 300kHz to 2.4MHz, allowing for the adjustment of switching frequency for optimal efficiency. The maximum continuous output current of 50A is supported, with an absolute maximum rating of 80A for up to 1ms.The control of the LTC3860EUH#TRPBF is achieved through the current-mode control of synchronous buck switching regulators. In this architecture, an error amplifier sets the voltage of the output, while one or more power switches connect it to the input rail, allowing current to flow in either direction. In the LTC3860EUH#TRPBF, the switches are controlled by the current limiting circuitry, which acts on the output current to maintain the desired output voltage.The controller includes an oscillator circuit, allowing the user to adjust the switching frequency. This helps to optimize the output load regulation and ripple, as well as improve transient response. The LTC3860EUH#TRPBF uses the sensing resistor to sense current, allowing it to respond to load transients quickly and accurately. The device also incorporates a clock buffer to allow for synchronization with an external clock source, if desired.In summary, the LTC3860EUH#TRPBF from PMIC - Voltage Regulators - DC DC Switching Controllers is a synchronous step-down switching regulator controller, designed to operate from an input voltage range of 4.5V to 56V, support a maximum continuous output of 50A, and feature a wide range of adjustable PWM frequencies. The device features current-mode control, adjustable switching frequency, sensing resistor current-sharing and clock buffer for external clock synchronization. It is an ideal solution for driving high power LED lighting, computing, industrial and communications devices.

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