LDK220PU-R Integrated Circuits (ICs)

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LDK220PU-R is a low-dropout Regulator (LDO). It is a linear voltage regulator, which gives a stable output voltage with a very low output noise. The LDK220PU-R is able to maintain a reliable output in the face of varying input voltages. It is ideal for powering precision analog circuitry and digital circuits that are sensitive to voltage spikes.

The LDK220PU-R provides an adjustable output voltage range of 0.8 V to 3.3 V. The fixed input voltage range is from 1.8 V to 6.5 V. It offers ultra-low dropout voltage of 190 mV at 200 mA output current, which increases to 390 mV at maximum output current of 300 mA. It also features a very low shutdown current of 30 nA.

The LDK220PU-R is designed to be used in battery-powered applications, where the output voltage has to remain constant while the battery is losing capacity. It has an external bypass capacitor to reduce output ripple and improve regulator performance, which is essential for noise-sensitive applications. It features short-circuit protection and thermal overload protection.

The LDK220PU-R is based on a DC to DC buck converter operating in what is known as an "open loop" mode. The output voltage is set by an external voltage divider, which sets an amplifier\'s inverting input voltage to a known reference voltage. This creates a control loop that adjusts the duty cycle of the switching element. The duty cycle is proportional to the output voltage setting. This approach provides excellent accuracy and good load regulation over a wide input voltage range.

The LDK220PU-R is capable of regulating both positive and negative output voltages. By adjusting the duty cycle of the switching element, the regulator provides a negative output voltage that is equal to the input voltage minus the dropout voltage. The dropout voltage of the LDK220PU-R is typically 190 to 390 mV at low to full load.

The LDK220PU-R is suitable for a wide range of applications, such as: precision power supplies, battery-backed automotive systems, portable medical equipment, consumer electronics, solar energy systems, and communications systems.

To sum up, the LDK220PU-R is a linear voltage regulator that offers ultra-low dropout voltage, low output noise, and excellent accuracy and load regulation. It can provide both positive and negative output voltages and is suitable for a variety of applications.

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