LTC3541EDD-2#PBF

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The LTC3541EDD-2#PBF is a high efficiency, programmable linear and switching regulator that provides regulated output voltages between 1.2V and 5V for applications requiring up to 1.6A of current. It combines a high performance USB-compliant switching regulator with a low noise, high PSRR linear regulator to provide a simple, cost-effective and flexible power supply solution. The output voltage of the synchronous buck regulator is easily programmed with two external resistors, and can also be externally monitored and fed back to select one of two output voltages.

The device can be used to provide one of two output voltages depending on the voltage at the VSENSE input.VSENSE can be driven directly from a TTL-compatible logic signal or connected to an external reference voltage. A 1.2MHz switching frequency allows the use of small and inexpensive ceramic capacitors, while the adjustable soft-start minimizes inrush current at startup.

The LTC3541EDD-2#PBF supports a wide range of input voltages, making it suitable for a variety of applications. The device operates over an input voltage range of 2.5V to 6.0V and can deliver up to an output voltage of 5V. The device can also be used in battery-powered applications and is equipped with an auxiliary linear regulator with an input voltage range of 0V to 6.0V.

The low dropout mode of the LTC3541EDD-2#PBF is especially useful in battery-powered applications, where the device is able to maintain very tight output voltage regulation over a wide range of battery voltages. It is also equipped with a power-saving mechanism that automatically reduces the buck converter\'s operating current when the output voltage is sufficiently low, enabling the device to operate at full load with less than 300uA.

The integrated power switch of the LTC3541EDD-2#PBF is monitored using a dedicated thermal detect pin, which provides a simple, accurate and reliable means of monitoring the junction temperature of the power switch. The device also includes an internal voltage detector that can be used to shut down the regulator in the event of an undervoltage, overvoltage or reverse battery condition.

The LTC3541EDD-2#PBF\'s wide range of features makes it an excellent choice for a variety of applications including smart phones, cameras, portable media players and other consumer electronics. Its wide input voltage range and adjustable output voltage range makes it suitable for applications requiring excellent line and load regulation, low noise and low quiescent current. The device also features integrated battery voltage monitoring and additional features such as thermal shutdown and soft-start.

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