LX8585A-33CDD

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The LX8585A-33CDD is a low dropout (LDO) linear regulator integrated circuit (IC) designed to provide a stable power supply voltage for a wide range of applications. It supplies a regulated output voltage of 3.3V over a wide input voltage range, from 3.0V to 20V, while requiring only a small input-output voltage differential. The circuit also has over-current, thermal overload, and reverse bias protection features.

The LX8585A-33CDD is primarily intended for use in systems such as those used in telecommunication and automotive applications, as well as in a variety of other electronic products. It can operate in sub-freezing temperatures and extreme heat and can withstand transients within the specified operating range.

The LX8585A-33CDD provides a wide range of output current, from 300mA to 550mA, with a maximum voltage drop of 0.8V at full load. The device operates over a temperature range of -40°C to +125°C and provides an input over-voltage protection of up to 40V. It also includes a power-saving stand-by mode that reduces the current consumption to 3µA when the input voltage is reduced to 5V or below.

The LX8585A-33CDD consists of a voltage reference, an error amplifier, a pass transistor, and two current sense amplifiers. The voltage-regulating circuit relies on the internal voltage reference to set the output voltage at 3.3V. The error amplifier monitors the output voltage and adjusts the base of the pass transistor, thereby controlling the output voltage. The current sense amplifiers sense the output current and shut off the pass transistor if it exceeds its specified safe limit. This helps to protect the device from overloading.

In addition, the LX8585A-33CDD includes output transistor protection against transients, output-over-voltage and reverse-current protection, inrush current limiting, anti-ringing circuitry, and an adjustable thermal shutdown function. The device also includes an enable/shutdown pin for remote shutdown and a discharge pin for discharging the output voltage before power-down.

The LX8585A-33CDD provides excellent performance in terms of low dropout voltage, high power efficiency, fast transient response, and low output noise. Its high power efficiency also contributes to reduced thermal dissipation and longer battery life in battery-powered systems. This device is a reliable and cost-effective solution for a variety of low-voltage applications.

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