LTC3335EUDC#PBF

Introduction

The LTC3335EUDC#PBF integrated step-down switching regulator is a high performance, ultra-low quiescent current (QC) output regulator for use in a variety of roles. It integrates an internal control logic driving a 400kHz switching frequency, enabling it to minimise the inductor size and system power loss. The device can deliver up to 3A output current and is compatible with both 5V and 3.3V output voltage levels.

Features

The LTC3335EUDC#PBF offers a wide range of features that optimise the performance of DC-DC systems. These features include:

• High efficiency - The LTC3335EUDC#PBF employs synchronous rectification with an external MOSFET to achieve 95% efficiency. This ensures low power dissipation and excellent thermal performance.
• Low output voltage accuracy - The LTC3335EUDC#PBF offers exceptional output voltage accuracy of +/- 1%. The inbuilt feedback circuitry ensures that the output voltage is tightly regulated.
• Low output ripple - The device includes an on-chip filter provides low output ripple, ensuring the system remains noise-free.
• Selectable output voltage - The device is adjustable, so you can select the appropriate output voltage for your system.
• High power density - The LTC3335EUDC#PBF offers superior power density. Because of its low quiescent current, the device is suitable for applications such as portable electronics where power consumption is critical.
• Wide input voltage range - The LTC3335EUDC#PBF can handle input voltages from 2.2V to 12V.

Application Fields and Working Principle

The LTC3335EUDC#PBF is suitable for a range of DC-DC applications, including automotive, industrial, portable, and telecomms equipment. Its integrated control logic and synchronous rectification make it ideal for fast-switching, high-efficiency applications.The device works on the principle of a hysteretic synchronous buck regulator. It uses an internal oscillator and comparator to control the switching action of an external MOSFET. A voltage sense circuit monitors the output voltage, and if the voltage exceeds a certain threshold the device will switch on the external MOSFET to deliver the current to the load. If the output voltage falls below a certain level, the device will switch off the external MOSFET and no current will be delivered to the load. This action is repeated at a high frequency, depending on the oscillator frequency of the device.

Conclusion

In summary, the LTC3335EUDC#PBF is a high-performance, low quiescent-current DC-DC buck regulator. It is designed to effectively regulate output voltage while maintaining a high level of efficiency. It has a wide range of features that make it suitable for a variety of applications and also provide superior performance.