PT78ST108ST

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DC-DC converters are electrical circuits or devices that convert direct current (DC) from one voltage level to another. PT78ST108ST is one such converter. It is a high efficient, compact, low-cost, constant voltage and step-down integrated DC-DC converter with a wide input voltage range of 7V to 40V. With the extremely high efficiency, up to 95%, and the fact that it operates with no external component, it offers a very viable solution for applications like automotive, industrial equipment, security systems, battery powered devices and many others that require an efficient, reliable and cost-effective DC-DC conversion.

When compared to other types of converters, the PT78ST108ST has a far superior energy efficiency with its low quiescent current of only 12.5μA, making it ideal for applications like automotive, industrial and medical systems. With its ultra-wide input voltage range, it also provides robust operation under harsh environmental conditions, where input voltage can fluctuate significantly.

PT78ST108ST includes an integrated regulator, two separate control loops and an over-current protection circuit. The internal regulator circuit provides tight regulation as well as excellent regulation accuracy, to ensure that the output voltage is maintained within specified ranges. This makes the PT78ST108ST very suitable for powering sensitive application, such as radar systems, motor drives, or medical equipment.

PT78ST108ST also includes a wide operating temperature range with the capability to operate between-45°C/-50°C and +125°C/+150°C, allowing it to be used in very wide temperature applications. With its no-heat-sink requirement, it significantly reduces the cost, form factor as well as the power dissipation of system designs. The PT78ST108ST supports both current mode and voltage mode, which switch is enabled through an external signal, making it ideal for multiple application requirements.

The PT78ST108ST works on a Pulse Width Modulation (PWM) control scheme and utilizes synchronous rectification to achieve its high efficiency. There is also an adaptive PWM control which provides a very fast response time to dynamically adjust the power output in order to maintain a stable output voltage. The PT78ST108ST also provides a soft-start feature that address inrush current problems, typically involves when start up.

The PT78ST108ST is highly reliable and capable of providing a continuous output power up to 2A without external heat sink. Its state-of-the-art control and protection features, along with its high efficiency and wide operating temperature range, makes PT78ST108ST an ideal DC-DC converter for many cost-effective, efficient, and reliable applications.

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