LTC7821EUH#PBF

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The LTC7821EUH#PBF (DC input synchronous buck controller) is part of the PMIC (Power Management Integrated Circuit) voltage regulator family, which provides the DC to DC switching controllers with the ability to regulate output voltage. This controller offers additional features such as programmable soft-start, adjustable current limit, and can respond to input voltage changes better than any other DC-DC controller on the market.

The LTC7821EUH#PBF offers high efficiency operation and low EMI, allowing for greater control over output voltage and current. This DC-DC controller uses a synchronous buck design in which the switching and inductor currents are the same, increasing efficiency by reducing the power losses due to the input impedance and providing better load regulation.

The LTC7821EUH#PBF is a versatile regulator, offering a range of features that allows for applications such as miniaturized DC-DC converters, compact DC-DC regulators for gaming boards and other devices, and even industrial-grade programmable power supplies. It also provides excellent dynamic performance with 1GHz bandwidth and ultra-low output voltage ripple.

The LTC7821EUH#PBF is designed to work with an external power MOSFET and requires no external resistor divider or capacitive divider. The LTC7821EUH#PBF also has a wide input/output voltage range, allowing it to serve a variety of applications. The voltage range is 0.8V to 28V input and 0.5V to 26V output.

The LTC7821EUH#PBF features a flexible PWM control system that is able to respond quickly to changing load conditions. It utilizes an optimized compensation algorithm, allowing for stable output without requiring an external compensation network. The PWM control operates in either current-mode or voltage-mode and can be configured for either voltage mode control or pulse-width modulation control.

The LTC7821EUH#PBF also features built-in overload protection and programmable soft-start. The built-in overload protection prevents excessive power from damaging the circuit and the programmable soft-start lengthens the start-up time to reduce power supply stress.

The LTC7821EUH#PBF makes use of switching frequency dithering technology to reduce induced noise, making it more suitable for low noise applications. It also supports maximum safe operating area (MOSA) control which limits the maximum operating power dissipation of the power MOSFETs, making it ideal for applications requiring high reliability. Lastly, the LTC7821EUH#PBF is capable of operating in both normal and low-noise modes.

In summary, the LTC7821EUH#PBF DC input synchronous buck controller is a versatile DC-DC controller that is designed to offer increased efficiency and improved performance. It features a wide input/output voltage range, varying PWM control modes, programmable soft-start and overload protection, dynamic frequency dithering, and maximum safe operating area (MOSA) control. These features make it an ideal choice for a wide range of applications, such as miniaturized DC-DC converters, programmable power supplies, and gaming boards.

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