LTC3355EUF#PBF

PMIC – Voltage Regulators – DC DC Switching Regulators:

The LTC3355EUF#PBF is a wide input range DC to DC regulator designed for managing both general purpose and low power applications. It offers a powerfully efficient solution for voltage regulation from a wide range of inputs, from 1.6V to 5.5V, and operates without the need for a heat sink. This regulator can also step down regulator high voltage inputs to lower voltage regulated outputs. The device also has a built-in high performance linear regulator that is capable of providing system power up to 0.8A from a single input voltage. The LTC3355EUF#PBF is capable of supplying up to 30V at up to 2.5A when an additional external power MOSFET is connected.

Features:

• Wide input voltage range of 1.6V to 5.5V
• High performance linear regulator up to 0.8A
• Low operating current, as low as 0.7µA in Shutdown
• Supersimple secondary side power supply integrated
• Intelligent float voltage tracking
Available in commercial and industrial temperature range
• Improved EMI performance

Application field:

The LTC3355EUF#PBF is best suited for applications requiring an efficient, one package solution. The device can be applied to a variety of general purpose and low power regulated applications with varying input voltage levels and regulated output voltages. Its low operating current and variable input voltage capabilities make it suitable for battery-powered systems, low noise systems, and communications applications.

Working principle:

The LTC3355EUF#PBF is a high performance, wide input voltage regulator operating with a variable supply voltage range from 1.6V to 5.5V. It contains a synchronous step-down switching regulator, a low power linear regulator, and a wide input voltage range secondary side power supply. The PFM-based switching regulator has an adjustable switching frequency from 300kHz to 2.2MHz, allowing it to be optimized for power efficiency, EMI attenuation, or output ripple. It also has an intelligent float voltage tracking feature which allows the regulator to reduce power consumption and noise by automatically adjusting the output voltage when a load is applied. The built-in synchronous gate driver provides driving capability for an external power MOSFET that can provide output power up to 2.5A with a maximum single input voltage of 30V. The on-chip linear regulator can provide up to 0.8A output current with a wide load range in low power applications.

Conclusion:

The LTC3355EUF#PBF is an extremely versatile, multi-functional DC to DC regulator capable of managing a wide input voltage range and providing regulated outputs in various applications. It combines the latest switching and linear regulation technologies, allowing it to provide an efficient, low power solution for multiple applications. Its wide input voltage range, small package size, and idle current makes it suitable for applications such as core supplies, wired and wireless peripherals, automotive, medical, GPS, and remote sensing.