LTC3883EUH#TRPBF

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The LTC3883EUH#TRPBF is a Pulse Width Modulation (PWM) controller with an integrated 2-A MOSFET synchronous Buck switching regulator. Its innovative architecture combines the high speed of conventional PWM controllers with the low total cost of conventional hysteretic current mode controllers while delivering high performance switching. The LTC3883EUH#TRPBF is capable of operating in either current mode or voltage mode PWM control while providing excellent transient response and low output voltage ripple.

The LTC3883EUH#TRPBF is ideal for a wide range of DC/DC conversion applications, including those found in industrial, medical, and wireless communications systems. With a wide input operating voltage range of 4.5V to 44V, the LTC3883EUH#TRPBF can be used to provide regulated power supplies with output voltages ranging from as low as 0.6V to as high as 18V, with a wide range of output currents.

Additionally, the LTC3883EUH#TRPBF is designed to be highly integrated, allowing for a minimal external part count and a very small form factor. It incorporates an internal voltage regulator to power the digital circuitry, and an integrated P-channel MOSFET gate driver to reduce power losses and maximize efficiency. Additionally, the LTC3883EUH#TRPBF also includes multiple protection features, such as over-voltage, over-current and temperature protection, to ensure safe and dependable operation.

The LTC3883EUH#TRPBF is a high efficiency, low cost, and flexible switching controller that is suitable for a wide range of applications. Its innovative architecture combines fast timing loop response, low power losses and high efficiency, while minimizing external part count and board space required. The device is ideal for industrial and medical applications, as well as portable and desktop systems that require low output voltage ripple and excellent transient response.

Working Principle

The LTC3883EUH#TRPBF works by pulsing a MOSFET transistor to continually adjust the output voltage. The output voltage is regulated by monitoring the output voltage with an internal error amplifier and simply ramping the pulse width up or down as needed. The MOSFET transistor is then pulsed with a varying duty cycle that is controlled by the PWM waveform. This waveform can either be generated by the internal oscillator, or an external signal given to the device. The pulse width is adjusted between the minimum and the maximum range determined by the threshold levels of the internal ramp generator.

The LTC3883EUH#TRPBF also features frequency foldback and skip cycle modes to reduce switching losses during light load conditions. Frequency foldback reduces the switching frequency when the load current is below an adjustable threshold, saving power by running at a lower frequency when the power requirement is low. The skip cycle mode, in contrast, changes the duty cycle of the PWM waveform when the load current is below a certain threshold, significantly reducing power losses while maintaining performance.

Conclusion

The LTC3883EUH#TRPBF is a high efficiency and low cost integrated DC/DC PWM controller with integrated synchronous Buck switching regulator. It is capable of operating in either voltage or current mode PWM control while providing excellent transient response and low output voltage ripple. Its wide input operating voltage range and various protection features make it ideal for industrial, medical, and wireless communication applications. Additionally, the device’s integrated voltage regulator, P-channel MOSFET gate driver, and frequency foldback and skip cycle features make it an ideal choice for applications that require low power losses and high efficiency.

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