LTC3621EMS8E-25#TRPBF

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The LTC3621EMS8E-25#TRPBF is a 1MHz high-efficiency synchronous buck regulator that is ideal for powering systems needing low-noise, high-current and small solutions. It has an internal fault protection circuitry and a wide 4.5V to 28V input range. This makes it very suitable for a variety of applications where a large current output is required, such as driving multiple loads, memory systems and FPGAs.

The LTC3621EMS8E-25#TRPBF is a low-power, high-efficiency and adjustable DC/DC converter that offers superior electrical characteristics. It is available in both non-isolated and isolated versions with a range of output currents as high as 25A. The non-isolated version features a PWM switch and integrated inductor, while the isolated version uses a synchronous buck topology with external components. The internal bleeder current ensures the current remains constant during light-to-medium loading conditions.

The core of the LTC3621EMS8E-25#TRPBF is the proprietary Internal-Mode V controller–an advanced switching regulator featuring excellent light load efficiency and fast transient response. Its construction combines a wide range of safety features such as over-current protection and thermal shutdown, providing reliable and dependable operation in harsh environments.

The LTC3621EMS8E-25#TRPBF is available in a variety of packages and can be operated over a wide temperature range of -40°C to 125°C. It also features adjustable output voltages, as well as a programmable operating frequency with a range of up to 1.2MHz. Typical applications include powering remote radio base stations, Internet of Things (IoT) devices, industrial and automotive applications, and more.

Working Principle

The main function of the LTC3621EMS8E-25#TRPBF is to regulate the output voltage so that it is always within specification, regardless of its input voltage or load conditions. It does this using two distinct phases: the high-side switch and the low-side switch.

The high-side switch is responsible for controlling the current flow through the power supply. When the input voltage to the voltage regulator is lower than the output voltage, the high-side switch turns on and allows current to flow from the input power to the output power. This phase is the active phase of operation.

At the same time, the low-side switch turns off and prevents current flow from the output to the input. This is the idle phase of operation when the input voltage is higher than the output voltage.

The LTC3621EMS8E-25#TRPBF is able to achieve higher efficiency and lower noise compared to other high-power buck regulators. It has a high-side switch on-resistance of 20mΩ and a low-side on-resistance of 8mΩ, making it an ideal choice for applications where space is at a premium.

Application Field

The LTC3621EMS8E-25#TRPBF is ideal for powering systems that require low noise and high currents in a small package. It is suitable for industrial, automotive, automatic test equipment, and remote radio base station applications. It can also be used in powering IoT devices, integrating FPGAs, powering subsystems with multiple loads, and for memory systems.

The LTC3621EMS8E-25#TRPBF is a great choice for applications that require an adjustable output voltage. It is designed to provide an output voltage range of 0.7V to 5.5V while its internal switching frequency can be adjusted up to 1.2MHz. This makes it an excellent choice for optimizing energy efficiency.

In summary, the LTC3621EMS8E-25#TRPBF is an ideal solution for powering low-noise, high-current, and small systems. Its internal fault protection circuitry provides reliable and dependable operation in harsh environments, while its adjustable output voltage and switching frequency make it an excellent choice for optimizing energy efficiency.

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