KA78M08TU

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KA78M08TU Application Field and Working Principle

KA78M08TU belongs to the class of linear voltage regulators, which are used to regulate the output voltage from a power supply. This voltage regulator is an 8-Pin, Small Outline Integrated Circuit (SOIC), which has been created for use in applications with a wide input-voltage range such as mobile phone, home appliance, safety control, receiver and Voltage Regulators. The KA78M08TU provides an output voltage of 5V and maximum output current of 1A to the load.

The KA78M08TU is a simple three-pin low-dropout linear voltage regulator designed to provide a stable output voltage of 5V or 10V. The regulator operates over a wide input voltage range of 4.0V to 40V and provides an output voltage tolerance of ±1% (at 25°C). The KA78M08TU has an extended operating temperature range of -20°C to +85°C and a peak output current of 1A.

Features of KA78M08TU

• Output Voltage: 5V or 10V
• Input Voltage Range: 4.0V to 40V
• Current Limit: 1A
• Operating Temperature Range: -20°C to +85°C
• Output Voltage Tolerance: ±1%

Application of KA78M08TU

The KA78M08TU voltage regulator is ideal for use in many applications such as cellular phones, personal digital assistants, laptop computers, and other handheld devices as well as automotive and industrial applications. It is especially suited for applications requiring high efficiency and low output voltage ripple. The KA78M08TU can also be used to regulate DC power supplies in multi-rail applications. In addition, the KA78M08TU can be used to provide a stable output voltage in battery-operated, low-current applications.

Working Principle of KA78M08TU

The KA78M08TU uses a feedback control system to regulate the output voltage. An error amplifier compares the resistor divider voltage, set by the reference voltage, with a feedback voltage from the output of the regulator. The output of the error amplifier drives the regulator output stage, which adjusts the output voltage to match the reference voltage by controlling the current flow through an external NPN bipolar transistor. The reference voltage determines the output voltage of the KA78M08TU regulator.

The KA78M08TU features over-current protection, which shuts down the load current if it exceeds the device’s specified current limit. The KA78M08TU also has over-temperature protection, which reduces current to the load if the temperature of the internal power transistor exceeds its rated temperature.

The KA78M08TU voltage regulator is a cost effective and efficient solution to many power supply design and power system applications.

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