LTC1438CG-ADJ#TRPBF

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LTC1438CG-ADJ#TRPBF Application Field and Working Principle

LTC1438CG-ADJ#TRPBF belongs to the PMIC (Power Management Integrated Circuit) category and is categorized as Voltage Regulators, DC DC Switching Controllers. This device works by providing a low-cost solution for regulating DC voltages in both high voltage and low voltage application areas.

In physical terms, LTC1438CG-ADJ#TRPBF is an eight-pin integrated circuit chip. Its package can be either an MSOP or a DFN. It contains an internal charge pump circuit, which provides extra current during power on or reset conditions.

Applications

The LTC1438CG-ADJ#TRPBF DC-DC switching controller is suitable for a variety of applications, some of which are listed here.

• Switching regulators and DC-DC conversions
• SMPS (Switch Mode Power Supply) circuits
• Battery operated devices
• Computer animation and/or graphics
• Robots
• Upsampling techniques
• DC motor controllers
• Power over Ethernet (PoE) systems

Working Principle

This DC-DC converter controls the current flow between two sources of power, in this case the input and output of a system. It functions as an electronic switch to enable the flow of current when required and to stop the flow when either the input or output reaches a pre-set threshold.

The LTC1438CG-ADJ#TRPBF is integrated with a \textit{fixed frequency}, \textit{pulse width modulator (PWM)} system. This PWM system is what helps to control the current flow between the input and output. PWM works by changing the width of the pulses on the control signal and as a result, the output of the sourced power is also modified accordingly.

The operating frequency of the LTC1438CG-ADJ#TRPBF can range from 300 kHz up to 1 MHz depending on the settings of a few integrated components. The switching frequency can also be adjusted using some onboard resistors and capacitors.

Apart from the voltage regulating functions, the LTC1438CG-ADJ#TRPBF also provides protection against over-current, over-power and over-temperature conditions. When these conditions occur, the device either shuts down the circuit or reduces the current output to protect the system.

Finally, the LTC1438CG-ADJ#TRPBF is also equipped with an adjustable soft-start facility, which allows for smooth powerup transition of the system.

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