LTC3427EDC#TRPBF

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LTC3427EDC#TRPBF Application Field and Working Principle

LTC3427EDC#TRPBF is a high performance synchronous buck-boost DC/DC switching converter with integrated LDO regulators from Linear Technology Corporation (LinearTech). This device is designed for applications that require medium to high power, low standby power and high conversion efficiency. It operates from an input voltage range of 4V to 28V and provides an output of up to 4A current. This device is designed for use in many industrial and automotive applications for power management and conversion.

Applications

• Automotive Battery Management
• Battery-Backed Power Supplies
• Electric Vehicle Charger Boost/Buck Mode
• Industrial DC/DC Converters
• High-Efficiency Buck-Boost Regulator
• Portable Battery-Powered Devices
• Green Energy Systems
• Wireless Base Stations
• Machine Vision Systems

Features

• Input Voltage Range: 4V to 28V
• Output Current: up to 4A
• Wide Input Voltage Range to 28V
• Low Quiescent Current: Only 16μA
• Frequency Adjustable from 750kHz to 2.2MHz
• Programmable Soft-Start for Low Component Stress at Turn-On
• Programmable Output Voltage Accuracy of ±1%
• Integrates High Accuracy Current Sense Amplifier
• Input/Output Overvoltage Protection
• Thermal Shutdown Protection

Working Principle

The LTC3427EDC#TRPBF DC/DC switching converter is a type of switching regulator, which uses high frequency switching to convert an input voltage to an output voltage with a high conversion efficiency. It works by continuously switching the input voltage on and off to a storage inductor and then from the inductor to the output and back in a valley-fill topology.

The LTC3427EDC#TRPBF has two internal DC-DC controllers. When there is a differential between the output voltage and the input voltage, one controller regulates the output to match the input voltage and the other controller regulates the output current to match the desired output current. This allows for a very accurate and efficient control of the output voltage and current.

The integrated LDO (low dropout) regulators provide extra protection to the device by preventing overflow voltage on the device’s output pins. These regulators also helps to reduce heat and power consumption in the device.

The device features a programmable soft-start operation to minimize in-rush current and minimize component stress upon powering up. There is also an adjustable output voltage accuracy of ±1% for precision voltage control. Other features include input/output overvoltage protection, thermal shutdown and pulse skip mode.

The LTC3427EDC#TRPBF switching converter is a great solution for many industrial and automotive applications because of its high efficiency, wide input voltage range of 4V to 28V, accurate output voltage regulation, low quiescent current and thermal shutdown protection.

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