LT1374CFE#TRPBF

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The LT1374CFE#TRPBF is a high performance monolithic CMOS (Complementary Metal-Oxide Semiconductor) step-down switching regulator designed to provide excellent load and line regulation with minimal external components. This regulator can provide a robust, reliable, cost-effective, and accurate power supply solution for systems that require a regulated output voltage. It is an ideal choice for powering battery-operated systems, industrial applications or any other system that requires a tightly regulated, high current GND rail. The device is available in both surface mount and through-hole packages.

Application Field

The LT1374CFE#TRPBF is a high performance step-down switching regulator that can provide excellent load and line regulation with minimal external components. The device allows for wide input voltage range from 3V to 60V and can support a maximum output current up to 6A. The device is especially suitable for battery-operated and industrial applications as a reliable, cost-effective and accurate power supply solution.

It is also very attractive in automotive, telecommunication and medical applications due to its high efficiency and wide operating temperature range (-40°C to +125°C). As a step-down switching regulator, it also allows for efficient conversion of an input voltage to a regulated output voltage.

Working Principle

The LT1374CFE#TRPBF consists of an internal voltage reference, error amplifier, oscillator, high-side driver, and PWM circuitry. The error amplifier compares the feedback voltage to the internal reference voltage and controls the current in the external pass transistor to maintain regulation. The oscillator is used to set PWM switching frequency which is typically of 300kHz. The high-side driver provides a high level of drive current to drive the external pass transistor.

To provide efficient and accurate voltage step-down, the device uses a fixed frequency peak current mode control. This architecture results in improved stability and allows for simple external components such as an input capacitor, output capacitor, an inductor, and feedback divider resistors. During normal operation of the device, the feedback voltage is compared to the internal reference voltage, and the error amplifier will adjust the current in the external pass transistor to maintain the output voltage. When the voltage drops below the threshold, the device will enter into protection mode and shut off the pass transistor to protect the external components.

Conclusion

The LT1374CFE#TRPBF is a high performance step-down switching regulator designed for battery-operated and industrial applications. It can provide excellent load and line regulation with minimal external components needed, making it an ideal choice for powering such applications. The device is available in both surface mount and through-hole packages, and is suitable for wide input voltage range from 3V to 60V and it can support maximum output current up to 6A. The device uses a fixed frequency peak current mode control to provide efficient and accurate voltage step-down, making it attractive for applications in automotive, telecommunication and medical due to its high efficiency and wide operating temperature range.

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