LT1528CQ#PBF

PMIC - Voltage Regulators - Linear

The LT1528CQ#PBF is a high-performance low-dropout adjustable/fixed 3-terminal voltage regulator. It features an adjustable output voltage range of 1.2V to 37V, 1.8V to 37V fixed output voltage options, a maximum current of 1.5A, and a wide operating temperature range of -40°C to +125°C.

The LT1528CQ#PBF offers a wide range of features to accommodate many operating conditions. Its low quiescent current (as little as 5µA) helps reduce power consumption, while its high ripple rejection (>60dB) helps ensure clean power. The LT1528CQ#PBF also has a wide voltage input range (4.5V to 70V) and is capable of output logic signals to power digital circuits that are independent of the input voltage. It also features both open and short circuit protection, thermal shutdown protection, and current limit.

The LT1528CQ#PBF can be used in a range of different applications. It is ideal for use in computing, instrumentation, and telecommunications applications, as well as in battery-powered systems, where low power consumption is essential. It can also be used for industrial automation and control, power conditioning, and power supply systems. It is well-suited to a wide range of applications, such as mobile phones, PDAs, music players, medical equipment, GPS units, and robots.

Working Principle

The LT1528CQ#PBF is a voltage regulator that employs a voltage-controlled current source, which produces an output voltage that is proportional to the input voltage. The regulator has three terminals – the input, output and sense – connected in series. A resistor connected between the sense and output terminal adjusts the output voltage. As the input voltage increases, the voltage drop across the resistor increases and the current through it increases. This increase in current causes an increase in the voltage on the sense terminal, which causes a decrease in the voltage across the regulator’s current source and thus a decrease in the output voltage.

To ensure that the output voltage remains constant, the LT1528CQ#PBF has a programmable monitoring circuit that monitors the sense terminal. When the voltage on the sense terminal exceeds a fixed limit, the current source is disabled, preventing further voltage drops. This is known as the current limiting mode of operation and is used to protect the regulator from excessive current.

The LT1528CQ#PBF is a stable and accurate regulator that can provide precise control over output voltage. It is an ideal solution for applications where reliable power regulation is necessary in order to protect sensitive equipment and maintain optimum performance. It is easy to use, highly efficient, and available in a variety of package sizes.