LTC3862IUH

Voltage - Supply (Vcc/Vdd):	4 V ~ 36 V
Supplier Device Package:	24-QFN (5x5)
Package / Case:	24-WQFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Enable, Frequency Control, Phase Control, Soft Start
Serial Interfaces:	--
Clock Sync:	Yes
Synchronous Rectifier:	No
Duty Cycle (Max):	96%
Frequency - Switching:	75kHz ~ 500kHz
Series:	--
Output Phases:	2
Number of Outputs:	2
Topology:	Boost, SEPIC
Output Configuration:	Positive
Function:	Step-Up, Step-Up/Step-Down
Output Type:	Transistor Driver
Part Status:	Obsolete
Packaging:	Tube

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LTC3862IUH Application Field and Working Principle

The LTC3862IUH is a high-performance synchronous current-mode non-isolated Buck DC/DC controller that can be used in a wide range of applications. With its 4.0A peak switch current, industry-leading peak efficiency, and wide input voltage range, the LTC3862IUH is designed to deliver superior performance and efficiency in a broad range of DC/DC converter configurations. The LTC3862IUH operates from a 3.0V to 28V input voltage range, and provides up to 4A of switch current at 500kHz switching frequency. It can be easily configured for a wide range of DC/DC applications, including point-of-load conversion and main rail powering in data center and telecom equipment.

Application Field

The LTC3862IUH is an ideal choice for embedded applications such as power management and portable device power and communications. It is also ideal for general-purpose power-conversion and telecom/data-center systems. Because of its high efficiency and 4.0A peak-switch current, it is especially suitable for applications requiring constant current/voltage stability and/or system efficiency.

Working Principle

The LTC3862IUH is a current-mode synchronous non-isolated DC/DC switching controller with a wide input voltage range of 3V to 28V. The output voltage can be regulated with an external sense resistor. The LTC3862IUH features two internal high-side and two low-side MOSFETs which can be activated in various combinations depending on system requirements. The device also features soft-start and over-current shutdown control for improved system stability and protection. The LTC3862IUH also includes an integrated power-good indication (PGOOD) signal, which provides an indication of the output voltage’s regulation status. Additionally, the device provides protection against short-circuits, over-temperature events, and under-voltage lockout as well as other features, such as minimum on-time control, which ensure that the device is protected against damage and provides optimal performance.

Conclusion

The LTC3862IUH is an efficient and versatile DC/DC converter controller that is ideal for use in embedded applications, telecom/data center systems, and general-purpose power conversion applications. The device provides an impressive 4A peak switch current and up to 98% peak efficiency, which makes it ideal for voltage regulation and efficiency optimization in a variety of power-conversion applications. Other features and protections, such as integrated PGOOD signal, short-circuit protection, over-temperature protection, and under-voltage lockout, are all present to ensure that the device is safe and provides optimal performance.

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