LT3048EDC-5

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LT3048EDC-5 Application Field and Working Principle

The LT3048EDC-5 is a low noise linear-switching voltage regulator with a wide input voltage range that includes includes both positive and negative supplies. The voltage regulator features a 0.1Ω series switch, a wide range of output current, very low noise, low output voltage ripple and low temperature coefficient.

The LT3048EDC-5 is suitable for a variety of applications including:

• Smoothing and stabilizing a digital DC voltage;
• Stabilizing a ±30V output voltage from a low power supply;
• Generating a negative or positive rail from a master supply in systems where dual power supplies are required.

LT3048EDC-5 Working Principle

The LT3048EDC-5 has an internal circuit which utilizes a 0.1Ω series switch to achieve low noise, low ripple voltage and low temperature coefficient. The series switch is controlled by an internal error amplifier that compensates for input and output voltages and actively adjusts the switch on/off ratios to maintain the desired output voltage. The output voltage of the circuit is stabilized by the error amplifier and the series switch.

The regulator has an input filter capacitor input and a primary and secondary regulating loop which contains a voltage divider, and adjustable series switch. The primary regulating loop is responsible for adjusting the voltage of the output while the secondary loop is responsible for error amplifying and controlling the switch on/off ratios. The LT3048EDC-5 also incorporates protection circuitry such as thermal protection, output over-voltage protection, input polarity protection, and output short-circuit protection.

Conclusion

The LT3048EDC-5 is a low noise linear-switching voltage regulator with a wide input voltage range that includes both positive and negative supplies. With a 0.1Ω series switch, wide output current range, and built-in protection circuitry, the regulator is suitable for both low noise and low voltage ripple applications. It can be used to generate a negative or positive rail from a master supply and provide a smooth and stabilized output voltage. The regulator’s error amplifier and series switch provide stable output voltage and the protection circuitry is designed to protect the device from potential damage.

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