LT3973EMSE-3.3#PBF

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LT3973EMSE-3.3#PBF is one of a family of low-noise, high-input-voltage, wide-output-regulation-range step-down DC/DC controllers. It is primarily used for voltage regulation in portable DC/DC Power supplies, battery-powered electronic products, notebooks, embedded designs and other circuits that require precise regulation of low voltage and high current.

This DC/DC switching regulator is a step-down topology, meaning it produces an output voltage lesser than its input. It uses pulse-width modulation(PWM) control scheme to regulate the output voltage. This device\'s control loop takes up less space on a PCB and is capable of faster transient response, both of which makes it ideal for reducing component count and costs.

The LT3973EMSE-3.3#PBF is designed with high voltage operating range operating up to 40V and capable of handling transients up to 50V. It has a minimum peak switch current limit of 3A along with programmable soft start and slew rate control that makes it suitable for driving power supplies with minimum power consumption. It also has three 200mV reference input voltage levels.

It also offers an adjustable frequency range from 500kHz to 4MHz. The LT3973EMSE-3.3#PBF utilizes an internal 300mV feedback voltage reference and an external voltage divider to set the output voltage. The device also features an external soft-start capacitor for adjusting the start-up time to reduce inrush current. Its operating temperature range is -40°C to +125°C.

The LT3973EMSE-3.3#PBF also features an enable input with a built-in manual or microcontroller-controlled shutdown capability, current-limit protection and UVLO for both high side MOSFET and power source. Its application fields include trucks, SUVs, buses, and other vehicles requiring higher-power DC/DC converters with minimum weight, electrical and space constraints.

In summary, the LT3973EMSE-3.3#PBF is a compact, high-performance, low-noise DC/DC switching regulator designed for applications that require precise regulation of low voltage and high current. With its wide operating range and adjustable frequency, it is suitable for use in portable and automotive applications, as well as embedded designs and other power-compromised applications.

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