PT8103C

Voltage - Output 3:	--
Base Part Number:	PT8103
Size / Dimension:	--
Package / Case:	31-SMD Module
Mounting Type:	Surface Mount
Efficiency:	86%
Operating Temperature:	-40°C ~ 85°C
Features:	--
Applications:	ITE (Commercial)
Current - Output (Max):	40A
Series:	Excalibur™ PT8100
Voltage - Output 2:	--
Voltage - Output 1:	1.075 ~ 1.85 V
Voltage - Input (Max):	3.6V
Voltage - Input (Min):	3.1V
Number of Outputs:	1
Type:	Non-Isolated PoL Module
Part Status:	Obsolete
Packaging:	Tray

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DC DC Converters: PT8103C Application Field and Working Principle

DC-DC converters have become an integral part of electronic systems and devices today. They convert electric power from one voltage or current level to another, and can be used to step up or step down the voltage or current to the desired level needed by the connected load. One example of such a product is the PT8103C, a low dropout linear regulator produced by Power-One. This device is used to convert a fixed output voltage into a lower fixed output voltage with low dropout and low noise. The PT8103C is ideally suited for applications in medical systems, industrial systems, communications, automotive electronics and consumer products. It is designed to handle up to 2.5Amps of output current, and the integrated MOSFET pass transistor helps to reduce PCB size and save cost. The PT8103C has very low output noise and excellent line and load regulation. The device can also be used in distributed power systems due to its low on-state resistance, enabling it to maintain line regulation even with multiple outputs.

Working Principle

ThePT8103C is a three-terminal adjustable linear regulator that operates bycomparing an internal voltage reference to the adjust terminal voltageand controlling the pass element accordingly. The PT8103C operates using an internal PNP transistor, resistive divider, and several other components. The output voltage is generated with a resistive divider consisting of an adjustable resistor and two fixed resistors. This resistive divider adjusts the output voltage according to the user-defined setting on the adjust terminal. The internal PNP transistor is used as the pass element to regulate the output voltage. When the voltage at the adjust terminal is lower than the internal reference voltage, the PNP transistor turns on and passes current from the output to the input of the device, thereby regulating the output voltage. When the voltage at the adjust terminal exceeds the internal reference voltage, the PNP transistor turns off and the output voltage is clamped to the voltage at the adjust terminal.

Features

The PT8103C is designed for low voltage and high current applications and features several benefits, including:

• Low dropout voltage: The maximum dropout voltage of 1.2V at 2.5A makes it suitable for applications with limited headroom.
• Very low output noise and excellent line and load regulation: The device can be used in distributed power systems due to its low on-state resistance, enabling it to maintain line regulation even with multiple outputs.
• High accuracy: The PT8103C has a guaranteed accuracy of ±1%.
• Integrated MOSFET pass transistor: This helps reduce the overall cost and size of the PCB
• Protection: The device has several protection features including output current limiting, short-circuit current limiting and thermal shutdown.

Applications

The PT8103C is widely used in a variety of applications such as:

• Medical systems: The device can be used to power portable medical devices suchas medical imaging and diagnosis equipment.
• Industrial systems: The PT8103C is suitable for powering process control systems, motor controllers, and instrumentation applications.
• Communications: It can be used to power base stations, routers, and various other communication systems.
• Automotive electronics: The PT8103C is used in automotive electronics such as telematics, smart safety systems, and infotainment systems.
• Consumer products: The device has applications in portable media players, cell phones and other consumer electronics.

Conclusion

The PT8103C from Power-One is an ideal device for power management in medical, industrial, communication, automotive and consumer electronics applications. The device is designed with a low dropout voltage and low noise output to ensure it meets the requirements of these demanding applications. Its integrated MOSFET pass transistor helps reduce the size and cost of the PCB design without sacrificing performance. And its protection features add an additional layer of safety and reliability.

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