LT1573CS8-2.5#PBF

Voltage Regulators - Linear Regulator Controllers Overview

The LT1573CS8-2.5#PBF is a low dropout PNP regulator driver manufactured by Analog Devices Inc., housed in an 8-lead SOIC surface-mount package. It operates with a single supply input voltage ranging from 2.8V to 10V and provides a fixed output voltage of 2.5V. The device supports up to 5A output current when paired with an external PNP pass transistor. Key electrical characteristics include a reference voltage of 1.265V, quiescent current of 1.7mA, and a shutdown threshold of 1.33V. It functions within a temperature range of 0°C to 125°C.

Voltage Regulators - Linear Regulator Controllers Feature Summary

• Integrates latching overload protection to minimize heat sink requirements
• Delivers fast transient response requiring minimal bulk capacitance
• Features precision output voltage regulation with 1% accuracy
• Supports single supply operation across a wide input voltage range

Voltage Regulators - Linear Regulator Controllers Applications

• Microprocessor power supplies
• High current low dropout regulator circuits
• Battery-powered systems requiring efficient voltage regulation

Voltage Regulators - Linear Regulator Controllers Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS adherence before procurement. Confirm the SOIC-8 package dimensions match your PCB footprint design. Ensure the fixed 2.5V output variant aligns with your system voltage requirements, as adjustable versions are also available in this series.

Voltage Regulators - Linear Regulator Controllers Selection Notes

Select this component for applications demanding high current capability with tight dropout specifications. Pair with a suitable external PNP transistor, such as the D45H11, to achieve the desired output current and transient performance. Consider thermal resistance and board copper area for adequate heat dissipation during operation.

Voltage Regulators - Linear Regulator Controllers Part Context

This part belongs to the LT1573 family of low dropout regulator drivers designed for high-current applications. Unlike standard linear regulators, it drives an external PNP pass transistor, allowing for flexible output voltage settings and higher current handling. The CS8 designation specifies the commercial temperature grade and plastic SOIC package.

Voltage Regulators - Linear Regulator Controllers Replacement Considerations

LT1573CS8-2.8#PBF

Voltage Regulators - Linear Regulator Controllers FAQ

How is the overcurrent protection implemented?

The LT1573 uses a timed latch-off circuit triggered when the DRIVE pin saturates. An external capacitor on the LATCH pin sets the timeout period before the regulator shuts down.

What is the function of the SHDN pin?

The SHDN pin disables the drive to the output transistor to turn off the output voltage and can also be used to reset the current limit latch.