LTC3879IMSE#TRPBF

PMIC - Voltage Regulators - DC DC Switching Controllers

The LTC3879IMSE#TRPBF is an integrated synchronous DC/DC controller which allows engineers to design high-performance point-of-load (POL) power supplies with low component count and a wide range of output power options. It features an adjustable output voltage from 0.88V to 5.5V, current mode operation with fast line/load transient response, and a power-good indicator for system monitoring.

The LTC3879IMSE#TRPBF uses a drive stage to convert input power into output power. This drive stage consists of an on-board N-channel MOSFET, gate drive, and gate oscillator. A high efficiency buck converter is incorporated into the drive stage to ensure superior performance, while a minimum external component count is required. The controller is designed to operate at a fixed frequency of 130 kHz or in spread spectrum mode with a very wide frequency variation from 100 kHz to 250 kHz. All of these features make it possible to achieve power densities of up to 10W/in^3.

The LTC3879IMSE#TRPBF is ideal for powering a wide range of application fields, such as networking equipment, cellular handsets, digital video broadcast receivers, LCD monitors, and other distributed power architectures. It is also well suited for use in notebook PCs, military and aerospace applications, and renewable energy systems. With its wide input voltage range (4.5V - 28V) and wide output voltage range (0.88V - 5.5V), the LTC3879IMSE#TRPBF is an ideal choice for POL switching regulator designs.

The working principle of the LTC3879IMSE#TRPBF is based on current mode control with a wide input voltage range and adjustable output voltage. It uses a fixed-frequency, peak current-mode architecture, together with synchronous rectification and a high side gate driver. This architecture can respond quickly to line and load transient conditions, resulting in greater voltage accuracy, stability, and output current capability.

The LTC3879IMSE#TRPBF is a high-performance, fully integrated DC/DC switching controller capable of delivering up to 10W of output power with an ultra-low component count. It features adjustable, fixed frequency (130 KHz) or spread spectrum mode operation, current-mode control and peak current-mode architecture, and a wide input voltage range of 4.5V - 28V. Faster line and load transient response ensures greater voltage accuracy, stability, and current capability for POL switching regulator designs.