S-13R1B25-A4T2U3

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Power management is a critical part of any system’s architecture and is becoming increasingly complex as new industry standards and regulations arise. With its single die regulator, the S-13R1B25-A4T2U3 is an efficient and extensively field-tested linear voltage regulator (LVR) designed to deliver up to 1.25A of reliable current in demanding applications. The S-13R1B25-A4T2U3 is a member of the S-13 Series of LVRs from the Taiwan-based semiconductor manufacturer, Star E Chips. It is designed to provide a wide input voltage range of 4V to 12V, making it suitable for applications requiring tight DC regulation for up to 1.25A of current.

Application field

The S-13R1B25-A4T2U3 is designed for various applications, particularly those requiring tightly regulated power sources in an environment with extreme environmental constraints. It is suitable for a wide range of applications including point-of-load (PoL) power supply, logic power supply, voltage regulation module (VRM), intermediate distribution frame (IDF) power supply, programmable logic controller (PLC) power supply, portable devices such as medical instrument, and embedded applications.

Working Principle

The S-13R1B25-A4T2U3 is a monolithic linear voltage regulator with an on-chip power transistor and current-limiting circuitry. It features an adjustable regulation range of 2.25V to 12V and a thermal shutdown feature of up to 150° C. This chip has excellent load and line regulation, ripple rejection, and output noise. It uses a single pin for both input and output voltage control, simplifying layout.

The input voltage is applied to the drain of the integrated power transistor, which is connected to the ground. As the input voltage rises, this power transistor pulls down the output voltage and regulates the output voltage to a fixed level. The current-limiting circuitry prevents the power transistor from being overstressed by the output current, thereby protecting the device.

The S-13R1B25-A4T2U3 LVR also features a power-down lockout, which prevents feedback for the output when the input voltage drops and the output is forced to a low state, thus protecting devices in the system from accidental voltage drops. The thermal shutdown feature ensures that the device does not overheat and causes damage to internal components.

Features and Benefits

The S-13R1B25-A4T2U3 LVR offers a wide range of features and benefits for applications requiring robust and reliable power management:

• Ultra-low noise performance.
• Excellent line and load regulation.
• High power efficiency.
• High ripple rejection.
• Low drop-out voltage.
• Over-temperature protection.
• Adaptive gate drive.
• Precision trim reference.

In addition, the S-13R1B25-A4T2U3 LVR is designed for high reliability and offers excellent surge capability, as well as extended temperature range of -40°C to 150°C. It also has wide output voltage range to meet the various requirements of modern power systems.

Conclusion

The S-13R1B25-A4T2U3 LVR is a versatile and reliable regulator for a wide range of applications. It is designed to offer excellent performance, low noise, and high efficiency in harsh operating environments. With its high ripple rejection and precision trim reference, the S-13R1B25-A4T2U3 has been extensively tested and proven to be reliable in many diverse applications.

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