MAX17428GTJ+TG40

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The MAX17428GTJ+TG40 is a special purpose voltage regulator and is part of the MAX17428 family of low-noise, high-PSRR, low-dropout (LDO) linear regulators. It is designed to operate from a 5V to 28V input supply and deliver a regulated 3.3V output (adjustable from 2.5V to 3.3V) at currents up to 400mA. The device features a low quiescent current of 8.8µA, ultra-low-noise performance of 5.5µV RMS and an extended load regulation range from 0mA to 400mA.

The MAX17428 is comprised of a power MOSFET, voltage reference, error amplifier, over-current protection circuitry, and switching circuitry. The MOSFET is configured as a low-side switch to allow the device to deliver larger output current than a typical LDO device. Additionally, the device utilizes a PMOS-controlled current-limit scheme to ensure fast and accurate over-current protection.

The MAX17428GTJ+TG40 also provides fast transient response and excellent line and load regulation performance. The device is able to deliver up to 85% of its maximum output current within 2µs of a step load change. The device’s line and load regulation ranges from 4mV to 75mV (typical) and 9mV to 100mV (maximum), respectively.

The MAX17428GTJ+TG40 has a wide variety of applications, but is most often used as a voltage regulator in automotive, industrial, and consumer applications. Automotive applications can benefit from the 28V input voltage capability, while industrial and consumer applications can benefit from the low quiescent current and low output noise of the device. Additionally, the wide operating temperature range of -40°C to +125°C enables the device to operate in wide range of environmental conditions.

In summary, the MAX17428GTJ+TG40 is a low-noise, low-dropout linear regulator designed for 5V to 28V input applications. Its low quiescent current, wide load regulation range, and accurate line and load regulation performance makes it an ideal choice for automotive, industrial, and consumer applications. Additionally, its wide temperature range is well-suited for harsh environment applications.

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