UA7808CKC

Voltage Dropout (Max):	2V @ 1A
Base Part Number:	UA7808
Supplier Device Package:	TO-220-3
Package / Case:	TO-220-3
Mounting Type:	Through Hole
Operating Temperature:	0°C ~ 125°C
Protection Features:	Over Temperature, Reverse Polarity
Control Features:	--
PSRR:	72dB ~ 62dB (120Hz)
Current - Output:	1.5A
Series:	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	8V
Voltage - Input (Max):	25V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Obsolete
Packaging:	Tube

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Introduction

The UA7808CKC is a linear voltage regulator from Power Management Integrated Circuits (PMIC) family. It is a three pin adjustable voltage regulator that features foldback current limiting and thermal shutdown functions. This regulator is designed to provide a wide range of voltage output within the range of 5V and 26V with current load up to 1.5A. With input voltages up to 35V, it is suitable for a wide range of applications.

Application field

The UA7808CKC has many applications in the real-world which include:

• Powering a card reader, control circuit, and battery charger
• Telecommunications equipment such as modems and routers
• Computer and consumer electronic products
• Voltage regulation for UARTs and other logic-level devices
• Cost, space, and performance optimized power supply lines

It is also an excellent choice for battery-powered applications due to its low quiescent current and low dropout voltage.

Working Principle

The UA7808CKC is an adjustable linear voltage regulator that works by maintaining a constant voltage output based on the reference voltage at its adjustment pin. The adjustable linear regulator uses a series pass transistor to drop the input voltage to the desired output voltage. In a UA7808CKC, the series pass transistor is controlled by the voltage at the ADJ (adjustment) pin. When the voltage at the ADJ pin goes above the maximum threshold or below the minimum threshold, the device goes into foldback or thermal shutdown mode. This allows the device to automatically reduce the load current if current load exceeds the programmed threshold.The device is designed to operate in a wide range of temperatures and voltages, with a maximum input voltage of 35V and an operating temperature range of –40°C to +125°C. The device also has built-in protection circuits that protect the device from overvoltage, reverse voltage, current overload and thermal shutdown.

Conclusion

The UA7808CKC is a high-performance adjustable linear voltage regulator from Power Management Integrated Circuits (PMIC) family. It is designed for applications where a wide range of voltage output, low quiescent current, and low dropout voltage is required. The device operates using a series pass transistor that is controlled by the voltage at the ADJ (adjustment) pin and features foldback current limiting and thermal shutdown functions. With an input voltage of up to 35V and an operating temperature range of –40°C to +125°C, this device is suitable for a wide range of applications.

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