UA7808CKTTRG3

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The UA7808CKTTRG3 is a positive voltage regulator from Texas Instruments and is a precise three terminal regulator. This device belongs to the PMIC – Voltage Regulators – Linear category, and is designed for medium to high volume applications. It is a cost effective solution for applications and systems that require a precise and reliable output voltage.

Features

• Provides outputs between +8V and +25V and a maximum output current of 5A.
• Output voltage and current can be externally programmed using a single resistor.
• Low output voltage ripple and wide range of output voltage.
• Thermal, overload and input under voltage protection.
• Low quiescent current.

Application Fields

The UA7808CKTTRG3 is suitable for a wide range of medium to high volume applications, such as in telecom, industrial and automotive applications. These applications require precise and reliable output voltage. Some examples of possible applications for this device include motor control, switching power supplies, automotive ECU, sensor power supplies and HVAC control.

Working Principle

The UA7808CKTTRG3 is based on a classic three terminal voltage regulator with an internally fixed output voltage. Its internal voltage reference is trimmed with an external resistor divider to an accuracy of ± 2%. The device has an input voltage range that extends to 40V and an operating temperature range of -40°C to +150°C.

The device utilizes the constant voltage feature of a transistor in order to control its output voltage. When the output voltage drops, the transistor injects additional current into the external circuit until the output voltage reaches the desired level. When the output voltage exceeds the set point, the transistor reduces the current flow and the output voltage stabilizes at the set point.

The UA7808CKTTRG3 provides thermal, overload and input under voltage protection. It has a typical quiescent current of 13 mA and a maximum output current of 5A. The device has protection features such as current limiting, short-circuit and reverse-bias protection.

The UA7808CKTTRG3 is an efficient and cost-effective voltage regulator that is well-suited for a wide range of medium to high-volume applications. It is reliable and precise and provides excellent performance in terms of output voltage accuracy and ripple.

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