LTC3827EG-1#TRPBF

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The LTC3827EG-1#TRPBF is an advanced synchronous switching regulator controller that provides a valuable alternative for DC/DC converters and other power supply applications. It features a high frequency current mode control architecture and can quickly respond to load or input voltage transients. It has the capability to generate DC/DC converters with up to 3 A of output current and over 80% efficiency.

The LTC3827EG-1#TRPBF combines an intuitive user-friendly PWM controller with a powerful external power MOSFET. It can control an N-channel power MOSFET using either a current-mode or voltage-mode control technique. The device operates at a switching frequency up to 500 kHz and its wide input voltage range of 4.5 V to 60 V makes it suitable for many different power supply applications. The voltage cycle-by-cycle current limit and real-time current limit protection ensure that the system is protected from INA rush and over current situations.

The LTC3827EG-1#TRPBF also features advanced loop compensation techniques which enable a smooth transient response and excellent dynamic performance. It has adjustable soft-start, adjustable switching frequency, and adjustable voltage gain. The built-in synchronous rectifier control logic minimizes system losses due to its low gate voltage drive capability.

The LTC3827EG-1#TRPBF is ideal for processor core power supply applications and other applications that require high-efficiency switching regulator control. It can be used to create ultra-low quiescent current on/off mode, burst mode, or continuous mode DC/DC converter solutions. This device can also be used to implement voltage tracking applications and power sequencing solutions.

Applications for the LTC3827EG-1#TRPBF include: processor core power supply, Li-ion notebook battery charger, VoIP systems, DC/DC auxiliary supply, and power sequencing solutions. Its features make it well-suited for implementations of high efficiency DC/DC converter designs, which are essential in many power management applications.

The working principle of the LTC3827EG-1#TRPBF is fairly straightforward. The PWM controller contains an oscillator, an internal power MOSFET driver, an error amplifier, a voltage reference, and a current sense amplifier. The oscillator sets the base switching frequency and can be synchronized with an external clock. The power MOSFET and the external MOSFET each have a control loop, and they can sense load current and output voltage to maintain constant voltage or constant-on time constant-voltage regulation.

The power MOSFET driver provides a high-current output to drive the external MOSFET, and the error amplifier compares the feedback voltage to an internally generated reference voltage to produce an error signal. The current sense amplifier senses the current flowing from the output of the external MOSFET to the load and the output of the error amplifier is used to modulate the switching duty cycle.

The operation of the LTC3827EG-1#TRPBF is further enhanced by two optional control features. The first is a current-mode control that can be enabled with a single resistor and it allows the device to track the load current. The other is voltage-mode control, which allows the device to adjust the switching frequency based on the load current. Both of these features help to ensure that the output voltage remains constant under varying load conditions.

In summary, the LTC3827EG-1#TRPBF is an advanced synchronous switching regulator controller that provides an efficient and accurate solution for DC/DC converter and other power supply applications. Its intuitive user interface and low quiescent current operation make it suitable for many different implementations and its advanced loop compensation techniques enable a smooth transient response and excellent dynamic performance. With its wide input voltage range and adjustable current-mode and voltage-mode control features, it is an ideal choice for designers looking for a reliable, efficient, and low-cost solution.

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