ADI LTC3541EDD#PBF

降压同步（1），线性（LDO）（1）20.8V ~ 5V，500mA0.9V ~ 5.5V

Overview

The LTC3541EDD combines a synchronous buck DC/DC converter with a very low dropout linear regulator (VLDO) to provide up to two output voltages from a single input voltage with minimal external components. When configured for dual output operation, the LTC3541’s auto start-up feature will bring the Buck output into regulation in a controlled manner prior to enabling the VLDO regulator output without the need for external pin control. VLDO/linear regulator output prior to Buck output sequencing may also be obtained via external pin control. The input voltage range is ideally suited for Li-Ion battery-powered applications, as well as powering sub-3.3V logic from 5V or 3.3V rails.

The VLDO regulator provides a low noise, low voltage output capable of providing up to 300mA of continuous output current using only a 2.2μF ceramic capacitor. The input supply voltage of the VLDO regulator (LVIN) may come from the buck regulator or a separate supply.

Features

Tube Package
2 outputs
Operating Temperature: -40°C~85°C
Peak Reflow Temperature: 260

Surface Mount Mounting Type

Applications

There are a lot of Linear Technology/Analog Devices
LTC3541EDD#PBF Linear Regulator Controllers applications.

• Constant high-current source
• Low parts count 5.0V to 3.3V computer supply
• Low noise SMPS post regulator
• Low-dropout SMPS post regulator
• High-current, current-limited switch
• Dual/Triple Power Supplies
• Desknotes and Notebooks
• Graphic Cards
• Ultra-Low-Dropout
• Voltage Regulators