TLE42794GMXUMA1

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PMIC - Voltage Regulators - Linear: TLE42794GMXUMA1 Application Field and Working Principle

The TLE42794GMXUMA1 is a linear voltage regulator that applications range from system voltage stabilization to RF signal conditioning. It belongs to the TLE427xx series of microcontroller-compatible CMOS linear voltage regulators and features a wide operational input range of 2.7V to 5.5V and variable output voltage range of 1V to 3.6V. It is programs by a simple supply-independent CMOS logic voltage that requires no additional external components.

Application Field

The TLE42794GMXUMA1 is ideal for a wide range of applications, such as:

• Microcontroller systems powered by 3V or 5V supply rails
• 3V/3.3V battery-operated applications
• RF signal conditioning

Working Principle

The TLE42794GMXUMA1 provides a precise, constant output voltage. In operation, the voltage regulator senses the output voltage through the ‘FB’ pin and regulates the voltage to the desired level. The output voltage is selected by applying logic levels to the ‘EN1’ and ‘EN2’ pins.

Step Regulator

The TLE42794GMXUMA1 also includes a step regulator that provides precise control of the output voltage. The step regulator is enabled with logic level at the ‘SR’ pin. The output voltage is selected using the logic levels at the ‘S1’ and ‘S2’ pins.

Soft Start

The TLE42794GMXUMA1 also features a soft start circuit. The soft start circuit reduces inrush current when the output voltage rises from 0V, limiting peak current demand. This prevents system glitches or ‘brown-outs’ when the output voltage changes.

Thermal Protection

The TLE42794GMXUMA1 also features thermal protection. The thermal protection circuitry will shut down the output if the internal temperature exceeds a certain threshold. This protects the device from overheating, which can potentially cause damage.

Fault Detection

The TLE42794GMXUMA1 also includes an overcurrent/overvoltage detector. This detector monitors the output voltage for abnormally high voltage levels, providing protection for the application if an overvoltage or overcurrent event occurs. If a fault condition is detected, the output of the TLE42794GMXUMA1 will shut down untilmanual reset.

Conclusion

The TLE42794GMXUMA1 is a versatile, high performance, low power linear voltage regulator. It is ideal for a wide range of applications, from system voltage stabilization to RF signal conditioning. It is easy to program and includes a step regulator for precise control of the output voltage, a soft start circuit for limiting peak current demand, a thermal protection circuit for protecting from overheating, and an overcurrent/overvoltage detector for preventing damage from fault conditions.

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