UC282TDTR-1 Integrated Circuits (ICs)

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The UC282TDTR-1 is a negative low dropout (LDO) regulator designed specifically for applications that require regulated and precise output voltages in the range of -1.2 to -20V. It features better line and load regulation than many other linear regulators, and it offers a high power-supply rejection ratio (PSRR) and a low noise output, making it suitable for powering microprocessors or for other noise-sensitive applications. It is housed in an ultra-compact SOT-23 package and comes with an integrated over-temperature protection, thermal shutdown, and current-limit protection to help maximize system reliability.

The UC282TDTR-1 is based on the classic ‘series pass’ configuration, with a very low dropout voltage (typically 0.35V at full load). The series pass configuration enables tight regulation at very low dropout voltages, while providing higher output current than more common shunt regulators (such as the TL783). This makes the UC282TDTR-1 very well suited for use in power-sensitive applications, where energy savings are essential.

The UC282TDTR-1 is designed to regulate output voltage with minimal degradation due to variations in input voltage and output load current. It has a very good line and load regulation, with a minimum of ± 0.5% (at full load) over the full -1.2 to -20V output range. Its low dropout voltage of 0.35V at full load provides excellent load regulation. It also features a high PSRR of up to 60dB at 100Hz, making it ideal for noise-sensitive applications.

The UC282TDTR-1 also features an integrated over-temperature protection, thermal shutdown, and current-limit protection to help maximize system reliability and prevent damage due to system overloads. The over-temperature protection automatically shuts down the output voltage if the junction temperature exceeds a preset level. This reduces the risk of damage due to overheating, and helps ensure that the device is operated within its specified operating limits.

Besides these protection features, the UC282TDTR-1 also offers a wide input range of -6 to -40V, and an output noise of 10µVrms at 10KHz, making it ideal for use in precision analog systems. It is also very efficient in its power dissipation, running at typically 75% efficiency across its output voltage range of -1.2 to -20V.

In summary, the UC282TDTR-1 is an excellent option for regulating low voltage and for noise-sensitive applications. Its low dropout voltage, high PSRR, and wide input range make it well-suited for powering microprocessors or other precision analog systems, while its over-temperature protection, thermal shutdown, and current-limit protection help to maximize system reliability. These features all combine to make the UC282TDTR-1 an ideal companion for almost any low voltage application.

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