LTC3541EDD-2#TRPBF

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Linear and switching regulators serve as the core components that power electronic products. The LTC3541EDD-2#TRPBF is an integrated low dropout (LDO) linear regulator and a buck-boost switching regulator that are combined into a single small package. The device is convenient and compact, making it ideal for automotive, computer, telecom, and medical applications.

General Features

• Input Voltage Range: 2.6V to 40V
• Operating Ambient Temperature: -40°C to 125°C
• Integrated Internal Power Devices: Low Dropout (LTC3541EDD) and Buck-Boost (LTC3541EDD-2) Regulators.
• Shutdown Function: Accurate Supply Voltage Monitoring
• Soft-Start: Limits Inrush
• Thermal Shutdown: Temperature-based protection
• Programmable Undervoltage Lockout: Adjustable voltage range
• Low Noise Over Wide Load Range: At peak performance

Application Fields

Due to the integrated LDO and buck-boost switching power regulators, the LTC3541EDD-2#TRPBF is ideal for limited-space, low-power applications. These include automotive, computer, telecom, and medical systems as well as industrial equipment requiring smaller, higher-efficiency solutions. These regulators can provide accurate and stable voltage output, with higher efficiency in applications such as automotive controller, PC/CPU/GPU, memory and audio, telecommunication systems, and medical devices.

Working Principle

The LTC3541EDD-2#TRPBF contains two independently adjustable low-dropout regulators, a low-dropout linear regulator (LTC3541EDD) and a buck-boost switching regulator (LTC3541EDD-2), along with an accurate 1% reference, an undervoltage lockout circuit, and a thermal shutdown circuit. The integrated LDO and power switching regulators deliver ultra-efficient, high-performance and low-noise power supply solutions. The device features low-impedance ceramic input and output capacitors. This feature gives high noise immunity in the presence of high frequency noise. The LTC3541EDD-2#TRPBF provides a low dropout voltage and wide input voltage range, enabling the device to accept input voltages that range from 2.6V to 40V. The high efficiency of the device is achieved by the low dropout voltage and the fast switching operation of the buck-boost regulator. The buck-boost regulator provides a series of pulses to the load, thus reducing the power loss across the output voltage regulator.

To ensure proper operation, the LTC3541EDD-2#TRPBF utilizes an accurate 1% reference for both the linear and switching regulators. The reference voltage ensures the accuracy of the output voltage and the current limit of the device. The undervoltage lockout circuit and the thermal shutdown circuit provide additional protection against potential problems. An internal shutdown circuit supplied with the device allows the user to monitor the supply voltage and provides additional current flow control.

The LTC3541EDD-2#TRPBF provides an ultra-reliable power supply solution, and its fast switching operation allows for low-power operation with high efficiency. The device operates without excessive voltage and temperature variation, thus improving performance and stability.

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