LT3689EMSE#PBF

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LT3689EMSE#PBF are high efficiency, low noise synchronous step-down switching regulators designed to deliver up to 60V input to 1.5A output. This family of switching regulators is specifically designed for space-constrained applications and uses all N-FET devices for very low RDS(on) power loss. The part can additionally be used as a low-side switch, making it suitable for automotive, industrial, and other applications where space is limited.

The regulators incorporate a unique synchronous control technique that enables very low no load Iq (quiescent) current operation. This prevents random glitches that appear in many other regulators due to sudden load changes and unwanted clock jitter. This results in very low operating noise, so the regulators are best suited for noise-sensitive applications.

The LT3689EMSE#PBF also features a low-RDS(on) integrated power switch, which eliminates the need for an external low-side power switch. The thermal performance of the regulator is also improved by this feature. The LT3689EMSE#PBF also offers a startup time that is ten times faster than similar switching regulators and helps minimize power consumption during start up, making it suitable for very power-sensitive applications.

The operating principle of the LT3689EMSE#PBF is based on the difference between the input voltage and the output voltage, which determines the duty cycle of the integrated power switch. When the voltage difference reaches a certain threshold, the switch closes and current flows from the input voltage source to the output voltage until the voltage difference reaches zero. This process repeats, and the resulting duty cycle can be adjusted by modulating the duty cycle with an external control signal.

As a DC-DC switching regulator, the LT3689EMSE#PBF can be used to provide regulated and adjustable power supplies for many applications, including microprocessors, low voltage LED strings, industrial controllers and more. The regulator is also compatible with a wide range of input voltages and provides constant current, constant voltage and constant power modes.

The LT3689EMSE#PBF also features an innovative “power tracking” mode that allows the regulator to continuously adjust its output power to match its load’s power requirements. This feature makes the device suitable for use in applications that require highly efficient power conversion over a wide input range.

Finally, the LT3689EMSE#PBF has the ability to protect itself and its load from various fault conditions such as under-voltage protection and over-temperature protection. This makes the device suitable for deployment in industrial, automotive and other potentially hazardous environments.

In summary, the LT3689EMSE#PBF is a high efficiency, low noise synchronous step-down switching regulator designed for space-constrained applications. The device features an integrated power switch and offers low RDS(on), fast start-up and power tracking capabilities. It is also compatible with a wide range of input voltages and protection features make it suitable for deployment in hazardous environments. The LT3689EMSE#PBF is the perfect choice for applications requiring regulated and adjustable power supplies.

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