LT1054IDWG4

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The LT1054IDWG4 is a switching voltage regulator that offers low noise and high efficiency thanks to its sophisticated topology and components. It is designed to be used in applications requiring high speed switching such as high performance digital signal processing, power converters, industrial power supplies, and LED lighting. The LT1054IDWG4 is a step-down regulator that takes an input voltage of up to 24 volts and provides an adjustable output voltage of up to 18 volts at up to 2.5 amps.

Features

• Efficiency up to 95%
• Wide input voltage range of 4.5V to 24V.
• Output voltage range of 0.8V to 18V.
• Switching frequency up to 1.5 MHz.
• 100kHz to 1.5MHz adjustable oscillator.
• High current MOSFET switches up to 2.5A.
• Small package of only 3mmx2mm.
• Internal soft-start for low supply current.
• Internal thermal protection.
• Protection from current and thermal overloads.

Operation

The LT1054IDWG4 operates as a voltage-mode control buck regulator with a peak current-mode topology. It runs a fixed frequency PWM regulator with an adjustable oscillator frequency which allows the regulator to operate efficiently over a wide range of load conditions. The regulator uses a single MOSFET switch to convert the input voltage to the regulated output voltage. The current-mode control is implemented by sensing the peak current of the switch, so that the regulator can adapt to the load conditions by controlling the on-time of the switch according to the sense current.

The LT1054IDWG4 uses an internal soft-start circuitry to limit the inrush current and the output voltage overshoot during power-up. It has integrated over-current and over-temperature protection to ensure stability in the event of a fault. The output voltage is adjustable and is programmed via a voltage divider connected to the VADJ pin.

Applications

• DC/DC converters.
• High performance digital signal processing.
• Power supplies for industrial applications.
• LED lighting systems.
• Microcontroller or microprocessor power supplies.

Conclusion

The LT1054IDWG4 is a high efficiency, adjustable, low noise and thermally protected, switching voltage regulator that can be used in a variety of applications. It is a robust and reliable solution that can provide both high efficiency and low noise performance. It has an adjustable oscillator frequency and internal soft-start circuitry that makes it easy to manage and program.

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