LTC1879EGN#TRPBF Datasheet/PDFThe LTC1879EGN#TRPBF is a monolithic, low current, programmable switching regulator with a voltage range of 2.5 to 28 V and is a member of Linear Technology’s low cost and efficient family of DC-DC switching regulators. The LTC1879EGN#TRPBF is designed to handle cases that require high power efficiency, low cost and long term stability.
Application Field
The main application field of the LTC1879EGN#TRPBF is in microprocessor-based systems such as telecom, cellular phones and other portable battery-powered designs. It is also a useful device in many other applications, including automotive, industrial and various consumer applications. It is generally used in circuit designs that require high power efficiency and long term stability.
Working Principle
The LTC1879EGN#TRPBF is a monolithic, low current, programmable buck switching regulator that can regulate output voltage from 2.5 to 28V. It uses a standard topology of Pulse Width Modulation (PWM) control circuitry and is capable of delivering up to 10A DC output current with 15uA quiescent current.
The input from the VIN pin of the LTC1879EGN#TRPBF is filtered by an LC filter and supplied to the internal PWM controller. The PWM controller then regulates the output voltage by adjusting the width of the pulse. The pulse width needs to be adjusted in order to maintain the correct output voltage, as the load current changes. The output of the PWM is then connected to a power switch. The output of the switch is then connected to the LC filter and output capacitor, where it then supplies the regulated DC output voltage to the load.
The LTC1879EGN#TRPBF has other features such as programmable soft start, output over-voltage protection, and synchronization. It also features thermal shutdown protection and short circuit protection both at the input and output sides. It also has an adjustable input voltage over-voltage lockout protection and an adjustable frequency range that allows it to operate both in DCM and CCM.