LTC3425EUH#PBF

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LTC3425EUH#PBF Application Field and Working Principle

The LTC3425EUH#PBF, an adjustable step-up DC–DC converter, is a popular choice among power management integrated circuit (PMIC) voltage regulators. While primarily designed as a DC–DC switching regulator, the LTC3425EUH#PBF has a wide range of applications. With its adjustable output voltage, constant frequency (CF) architecture, and onboard high-side MOSFET, the LTC3425EUH#PBF provides the flexibility, high efficiency, and safety features never before seen in DC–DC switching regulators.

Overview

The LTC3425EUH#PBF is a simple and efficient solution for providing high current, low voltage output from a very low quiescent input. Typical applications of the LTC3425EUH#PBF include gate drivers, LED drivers, audio amplifiers, voltage multipliers, battery preconditioning, and more. The LTC3425EUH#PBF is a relatively low dropout DC–DC converter with a 0.5V voltage dropout, providing up to 40mA of output current.

Input Voltage Range

The LTC3425EUH#PBF operates with an input voltage range of 1.20V up to 27V, making it suitable for a wide variety of power sources. Due to its adjustable output voltage, the LTC3425EUH#PBF can be used with unregulated power supplies as well as regulated power sources.

Output Voltage Range

The output voltage range of the LTC3425EUH#PBF ranges from 0.75V to 6V. The output voltage can be adjusted using the onboard digital potentiometer or a resistor divider. Pulsing the enable pin will also adjust the output voltage.

Efficiency and Maximum Output Current

The LTC3425EUH#PBF is a highly efficient, low dropout regulator, capable of delivering up to 40mA. The maximum efficiency of the converter is 93%, and it typically reaches 85% under nominal load conditions. The power dissipation of the IC is 83mW.

Additional Features

In addition to the adjustable output voltage and high efficiency, the LTC3425EUH#PBF features a constant frequency (CF) architecture. This feature enables the design engineer to optimize frequency and efficiency to meet specific application requirements. The integrated high-side MOSFET provides an additional layer of safety, while the shutdown feature allows the regulator to be switched off to save power.

Package and Dimensions

The LTC3425EUH#PBF comes in a tiny SO-8 package with dimensions of 2.6mm x 3.2mm x 0.9mm. It is RoHS compliant and priced economically. Additionally, the LTC3425EUH#PBF is available as a surface-mounting device or as a through-hole device.

Conclusion

The LTC3425EUH#PBF is an ideal choice for a wide range of applications, such as gate drivers, LED drivers, audio amplifiers, voltage multipliers, and battery preconditioning. Its adjustable output voltage, low quiescent current, high efficiency, and onboard high-side MOSFET make it an ideal choice for a wide range of applications. Its small size, low heat dissipation, and low price make it an attractive option for designers of all types.

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