Texas Instruments

PT78ST105H  

External/Internal DC DC Converters

PT78ST105H Description

The PT78ST105H from Texas Instruments is a high-efficiency DC-DC converter designed for industrial and commercial applications. This obsolete model delivers a regulated 5V output with a maximum current of 1.5A, making it suitable for powering low-voltage circuits in embedded systems, telecommunications, and IT equipment. With an input voltage range of 9V to 38V, it accommodates a wide variety of power sources, including automotive and industrial power supplies. The converter boasts an impressive 85% efficiency, minimizing energy loss and heat generation. Its through-hole, right-angle mounting and compact dimensions (23.9mm x 22.9mm x 7.9mm) ensure easy integration into space-constrained designs.

PT78ST105H Features

• Wide Input Range (9V–38V): Supports flexible power sourcing in harsh environments.
• High Efficiency (85%): Reduces power dissipation, enhancing reliability.
• Robust Protection: Features Over-Temperature Protection (OTP) and Short-Circuit Protection (SCP) for fail-safe operation.
• RoHS3 & REACH Compliant: Meets stringent environmental and safety standards.
• Compact & Durable: Ideal for high-density PCB layouts with a rugged tray packaging.
• Low Moisture Sensitivity (MSL 1): Suitable for extended storage and handling.

PT78ST105H Applications

• Industrial Automation: Powers control systems, sensors, and PLCs.
• Telecom Infrastructure: Provides stable voltage for networking hardware.
• Commercial IT Equipment: Used in servers, routers, and embedded computing.
• Automotive Electronics: Supports infotainment and diagnostic tools.
• Medical Devices: Ensures reliable operation in low-power diagnostic equipment.

Conclusion of PT78ST105H

The PT78ST105H is a versatile, high-performance DC-DC converter, offering efficiency, durability, and protection features tailored for demanding applications. While marked obsolete, its design remains relevant for legacy systems requiring stable 5V power with wide input tolerance. Engineers valuing compact size, compliance, and robustness will find it a reliable choice, though newer alternatives may be preferred for forward-looking designs.

PT78ST105H Documents

Download datasheets and manufacturer documentation for PT78ST105H

Datasheets :

PT78ST100 Series      

HTML Datasheet :

PT78ST100 Series