LTC3532EMS#PBF

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The LTC3532EMS#PBF is a monolithic DC/DC step-down switching regulator that operates from an input voltage as high as 37V and as low as 2.25V, ideal for automotive and industrial applications.

The LTC3532EMS#PBF is capable of supplying up to 4A of output current and provides significant internal power dissipation and power conversion efficiency. The device includes an adjustable frequency current mode PWM controller, optimized for fixed frequency operation, which provides low output ripple under most conditions and no audible noise generation. The output voltage of the LTC3532EMS#PBF can be easily programmed by external resistors.

The application field of the LTC3532EMS#PBF mainly focuses on DC/DC regulation and power conversion. The device is capable of powering automotive systems, communication equipment, consumer electronics, and industrial equipment, where a regulated and isolated power supply is required. The 19-Lead TSSOP package works very well for automotive and industrial systems, providing for efficient thermal dissipation.

The working principle of the LTC3532EMS#PBF is based on its integrated adjustable current mode PWM controller and rugged, N-channel power MOSFET switch. Both combined to drive an external N-channel power MOSFET, driven by the PWM controller. The PWM controller offers programmable switching frequency up to 1 MHz, allowing the user to optimize power conversion efficiency.

The LTC3532EMS#PBF provides a novel control scheme, allowing the synchronous rectification control signal (SR) to pulse-width modulate with the high-side switch signal. During heavy-load transient, such as short circuit conditions, the SR signal modulates to keep the switching frequency fixed, resulting in improved output noise performance. The device also provides an internal soft-start function, enabling a gradual turn-on of the output voltage, reducing inrush current from the input supply.

The LTC3532EMS#PBF includes a unique feature for automotive applications known as Automatic Shutdown. This feature allows for a fast round-trip detection, reducing the input supply current by more than 90%. This feature is ideal for automotive systems and provides a high level of protection from overvoltage or accidental voltage transients.

The LTC3532EMS#PBF is designed to provide a highly efficient, compact, and cost-effective solution for a wide range of applications where space and cost constraints are of paramount importance. Its features and ease of use make it a perfect choice for powering automotive and industrial systems.

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