Suitable for driving the microprocessor power supply LT1587 LT1431S

Description: Figure (a) illustrates a microprocessor power supply circuit utilizing the LT1587-3.45. Figure (b) depicts a power supply with an adjustable output voltage constructed using the LT1585. Figure (c) showcases a computer power supply circuit formed with the LT1584 and LT1431. The LT1584, LT1585, and LT1587 have output currents of 7A, 4.6A, and 3A respectively, making them suitable for driving microprocessor regulators with high-speed transient response characteristics and load regulation of 0.5% in thermal breakdown protection circuits. The basic application circuit is straightforward, featuring a fixed output voltage that requires only the connection of input and output capacitors. For adjustable output voltage, two resistors must be connected to set the output, with input and output capacitances being quite small.

The LT1587-3.45 is a low-dropout voltage regulator designed to provide a stable output voltage for microprocessor applications. Its features include a high output current capability of up to 3A, making it suitable for systems requiring significant power. The device operates with a dropout voltage of only a few hundred millivolts, allowing it to maintain regulation even when the input voltage is close to the output voltage.

The LT1585, with an adjustable output voltage, offers flexibility in applications where the required voltage might vary. By using two external resistors, the output voltage can be set to a desired level, which is particularly useful in custom applications where specific voltage levels are necessary. This device also supports high output currents of up to 4.6A, ensuring it can handle demanding loads.

The LT1584, used in conjunction with the LT1431, provides a robust solution for computer power supply applications. The LT1431 is a precision voltage reference that can be used to provide a stable reference voltage for the LT1584, enhancing the overall performance of the power supply circuit. With an output current capability of 7A, the LT1584 is ideal for high-performance computing applications that require stable and reliable power delivery.

In these circuits, the design simplicity is evident. For fixed output applications, the connection of input and output capacitors suffices to ensure stability and performance. In contrast, for adjustable output applications, the careful selection of resistor values is critical to achieving the desired output voltage while maintaining the necessary transient response and load regulation characteristics.

Overall, these linear regulators are designed with thermal protection features that prevent overheating, ensuring reliable operation in various conditions. The load regulation of 0.5% indicates that the output voltage remains stable even with variations in load current, which is essential for sensitive microprocessor applications. The small size of the input and output capacitors allows for compact circuit designs, making these regulators suitable for modern electronic devices where space is a premium.Figure (a) is the use of a microprocessor power supply circuit constituted LT1587-3.45. Figure (b) is constructed using the LT1585 output voltage adjustable power supply. Figur e (c) is the use of computer power LT1584 and LT1431 constituted. LT1584, LTl585, LT1587 output current of 7A, 4.6A, 3A, is most suitable for driving the microprocessor regulator with high-speed transient response characteristics, load regulation of 0.5% in the thermal breakdown protection circuit. The basic application circuit is very simple, fixed output voltage, as long as the input and output terminals of each capacitor connected l only; an adjustable output voltage, connect the output setting for the two resistors to, input and output capacitance can very small.