LTC3876IFE#TRPBF

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Applications:	Controller, DDR
Voltage - Input:	4.5 V ~ 38 V
Number of Outputs:	2
Voltage - Output:	Adjustable
Operating Temperature:	-40°C ~ 125°C
Mounting Type:	Surface Mount
Package / Case:	38-TFSOP (0.173", 4.40mm Width) Exposed Pad
Supplier Device Package:	38-TSSOP-EP
Base Part Number:	LTC3876

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Introduction

Power Management Integrated Circuits (PMICs) are a type of electronic component that helps manage the flow of power in electronic circuits or systems. They are used in virtually all types of electronic equipment, from small consumer devices to large industrial applications. Voltage Regulators are used to control the voltage to a prescribed level for a particular type of application. They are available in a variety of formats and range from simple single-output devices to complex multi-output devices. Special Purpose voltage regulators are a sub-category of voltage regulators and are designed to satisfy a specific requirement. The LTC3876IFE#TRPBF is a special purpose DC/DC switching regulator that is capable of supplying up to 15A self-actuated load currents. In this article, the application field and working principle of the LTC3876IFE#TRPBF will be discussed.

Application Field of the LTC3876IFE#TRPBF

The LTC3876IFE#TRPBF is a DC/DC switching regulator made by Texas Instruments. It is a high-performance integrated power stage that can deliver up to 15A of current on a pre-programmed or externally programmed output voltage. It is designed to be used in a variety of applications, including routers, firewall appliances, gaming consoles, optical transceivers and other equipment needing high-performance DC/DC power supplies. It is also suitable for situations where multiple outputs are needed, such as powering the main processor and different on-board ASICs.The LTC3876IFE#TRPBF is designed to operate from a wide range of input voltages, including 7V to 60V up to 15A for both pre-programmed and externally programmed output voltages. It features a high efficiency (up to 97%) and low noise operation. It can be programmed for output voltages in the range of 0.8V to 5.5V with ±2% accuracy. The device also features a wide variety of protection features, including over-voltage protection (OVP), over-current protection (OCP), under-voltage lockout (UVLO), cycle-by-cycle current limiting and short-circuit protection.

Working Principle of the LTC3876IFE#TRPBF

The LTC3876IFE#TRPBF is a DC/DC switching regulator that is made of two main sections – the power stage and the logic circuitry. The power stage consists of an internal high-side MOSFET, an internal low-side MOSFET, and an output inductor connected between the load and ground of the power stage. The two MOSFETs are connected in a buck converter arrangement, and the output is regulated by adjusting the duty cycle of the MOSFETs. The logic circuitry consists of a driver control circuit, a voltage or current sense circuit, an oscillator section and an output control logic section. The driver control circuit is responsible for generating the drive signals for the high-side and low-side MOSFETs. The voltage or current sense circuit is used to provide feedback to the output control logic. This feedback is used to adjust the duty cycle of the power stage to keep the output voltage at the desired level. The oscillator section generates a switching frequency (over 1MHz, typical) that is used to clock the output control logic and the driver control circuit. The output control logic is responsible for regulating the output voltage according to the feedback from the voltage or current sense circuit. This logic section also contains the over-voltage, over-current and under-voltage lockout features of the LTC3876IFE#TRPBF.

Conclusion

The LTC3876IFE#TRPBF is a high-performance DC/DC switching regulator designed for use in multiple-output applications. It is designed to operate from a wide range of input voltages, and can supply up to 15A of current. It features high efficiency and low noise operation, and is capable of regulating the output voltage in the range of 0.8V to 5.5V with ±2% accuracy. The LTC3876IFE#TRPBF also offers a variety of protection features, including over-voltage protection, over-current protection, under-voltage lockout, cycle-by-cycle current limiting and short-circuit protection. It is well suited for applications such as routers, firewall appliances, gaming consoles, optical transceivers and other equipment requiring high-performance DC/DC power supplies.

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