LTC3126EFE#TRPBF

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Introduction
The LTC3126EFE#TRPBF is a high-efficiency DC/DC switching regulator that is designed for use in a wide range of application fields. The LTC3126EFE#TRPBF features integrated power MOSFETs and high-efficiency synchronous rectifiers to provide high-performance power conversion in a very small form factor. It offers a wide range of voltage and current ratings and is capable of operating over a wide input voltage range of 4.75 V to 36 V and supply output voltages as low as 0.8 V. In addition, the LTC3126EFE#TRPBF includes programmable current-limit protection, and thermal shutdown protection to ensure reliable operation during fault conditions and extended life cycle.

Applications
The LTC3126EFE#TRPBF can be used for a variety of applications. The primary application fields are in portable electronic devices, motor drives, telecom/networking equipment and automotive applications. Examples include mobile phones, laptop computers, tablets and digital cameras. For instance, the LTC3126EFE#TRPBF can be used to provide power conversion from a single Li-ion cell to low-voltage processor and system supply rails, as well as powering DC motor drives for portable fan and pump applications.

Working Principle
The LTC3126EFE#TRPBF uses a synchronous buck topology to convert input (Vin) to output (Vout) voltages efficiently over a wide range of input and output voltages. It includes an on-chip SenseFET, which switches a power MOSFET on and off based on the input voltage. The switching frequency is set by an external resistor and the operating frequency can be set up to 1 MHz. The efficiency of the converter is improved by the use of an external Schottky diode between the input and output, which reduces the reverse current losses when the power MOSFET switches off. It also includes a high-side N-channel MOSFET that is used to control the gate drive voltage of the power MOSFET.

The LTC3126EFE#TRPBF offers excellent performance in terms of efficiency, line regulation and load regulation. To ensure a wide range of input and output voltages, the LTC3126EFE#TRPBF features a built-in voltage feedback loop with an adjustable voltage reference. The voltage reference can be adjusted from 1.20 V to 4.00 V. It also includes a second, low-voltage feedback divider that is used to adjust the current limit. This allows a wide range of current limit setting, from 0.1 A to 20 A. To improve protection against short circuit faults, the LTC3126EFE#TRPBF includes a programmable over-current protection. The over-current protection is adjustable from 0.3 A to 20 A.

The LTC3126EFE#TRPBF also features an internal power-saving sleep mode which provides a low quiescent current in standby mode. This sleep mode can be enabled and disabled via an external switch. In addition, the LTC3126EFE#TRPBF includes an undervoltage lockout (UVLO) which prevents the converter from operating during the start-up period when the input voltage is below a certain threshold. This is a useful feature which helps to ensure a stable converter operation at all times. It also includes thermal shutdown protection which helps to protect the device against thermal overloads.

Conclusion
The LTC3126EFE#TRPBF is a high-efficiency DC/DC switching regulator suitable for use in a wide range of application fields. It offers excellent performance in terms of efficiency, line regulation, load regulation and over-current protection. It also includes a power saving sleep mode and thermal shutdown protection for improved reliability. Overall, the LTC3126EFE#TRPBF is an ideal choice for portable electronic devices, motor drives, telecom/networking equipment and automotive applications.

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