LD29300P2M33R

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The LD29300P2M33R is an adjustable 3A, low-dropout voltage regulator from Diodes Incorporated. This regulator is capable of providing a stable output voltage (up to 10.8V) with an input voltage of 2.9V to 5.5V. It features an accurate load regulation, low power consumption, low dropout voltage, and very low output noise. It is ideal for high current applications such as powering LEDs, displays, and processor cores.

Application Field

The LD29300P2M33R is designed to be used in a wide range of applications where precision voltage regulation and/or low voltage dropouts are required. It is suitable for powering digital, analogue and mixed-signal integrated circuits and other devices in a wide variety of portable and commercial applications, such as automotive, industrial, telecommunications, computer and consumer applications.

Working Principle

The LD29300P2M33R operates on the principle of voltage regulation. It is similar to a low-dropout voltage regulator with the exception that it does not have an adjustable output voltage and the output voltage is determined by the input voltage. The regulator uses a current sensing technique to provide accurate and stable output voltage, which is independent of the load current and the input voltage. The voltage reference pin, VREF, is used to set the output voltage. The reference voltage is determined by the resistor divider network connected to the pin.

The LD29300P2M33R has an internal compensation capacitor, which is used to reduce ripple on the output voltage, and an adjustable current limit. The current limit is determined by the resistor connected to the pin and can be set up to 8A, providing the capability to source a wide range of load currents. The load current is directly proportional to the output voltage and can be adjusted by controlling the input voltage.

The LD29300P2M33R has thermal protection and over-current protection that are controlled by the internal temperature sensor and by an external resistor connected to pins 1 and 2, respectively. The thermal protection has a hysteresis of 10°C and shuts down the regulator when the die temperature exceeds a certain hot temperature, which can be set by changing the resistor connected to the pin.

Overall, the LD29300P2M33R is an efficient and versatile linear regulator with a wide operating range, low quiescent current and good load and line regulation. It is ideal for powering high current applications, as well as providing adjustable output voltage in portable and commercial applications.

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