LT3669HUFD-2#PBF

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LT3669HUFD-2#PBF is an integrated switching regulator, combining dual low dropout linear regulator with full power output switch. This device features ultra-low quiescent current (50 μA), low voltage dropout, fast transient response and current limit. As one of the feature-rich linear devices, LT3669HUFD-2#PBF is used to extend battery life and provide consistent output power over temperature and voltage variances.

The application field of LT3669HUFD-2#PBF is about managing electrical power of portable and automotive electronics, such as telecom base band, point of sale systems, handheld device, and wearables. These electronics require power management from main power, battery, or adapter to run the device in the best efficiency. TTL compatible enable pin is also included to turn off both LDO and switch to achieve minimum power consumption.

The working principle of LT3669HUFD-2#PBF is related to its voltage regulation circuit. Firstly, an error amplifier receives a feedback voltage from the output, comparing it with a reference voltage, which is accurate and stable. Secondly, the output of the error amplifier drives an internal N-MOSFET to regulate the load current. Thirdly, the current then passes the internal series resistor, and finally, the linear feedback regulator with proper compensation controls the output.

In summary, LT3669HUFD-2#PBF is a feature-rich linear device used to extend battery life and providing consistent output power when managing power of portable and automotive electronics. Its working principle is related to its voltage regulation circuit, which operates with an error amplifier receiving a feedback voltage from the output and compare it with a reference voltage, then an internal N-MOSFET is actuated and linear feedback regulator with proper compensation kicks in to stabilize the output.

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