LT1575CN8-3.3#PBF

Voltage Regulators - Linear Regulator Controllers Overview

The LT1575CN8-3.3#PBF is a fixed-output low dropout regulator controller from Analog Devices, housed in an 8-pin PDIP package. It provides a precise 3.3V output with ±0.6% tolerance at room temperature and ±1.0% over the operating range. The device operates within a 5V to 22V input voltage window and draws a typical quiescent current of 12mA. Line regulation is specified at 0.01%/V, while load regulation achieves a typical value of 1mV. Designed for high-speed transient response, it eliminates bulk output capacitors by driving external N-channel MOSFETs.

Voltage Regulators - Linear Regulator Controllers Feature Summary

• Ultrafast transient response capability that removes the need for expensive tantalum or electrolytic output capacitors
• Fixed 3.3V output voltage with precision trimming for tight tolerance across temperature ranges
• Integrated multifunction shutdown pin providing latchoff, overvoltage protection, and thermal shutdown
• High-side sense current limit amplifier with programmable time-out functionality

Voltage Regulators - Linear Regulator Controllers Applications

• Pentium processor power supplies
• PowerPC processor supplies
• GTL termination circuits
• Low voltage logic supplies

Voltage Regulators - Linear Regulator Controllers Procurement Notes

Verify the component matches the specific 8-pin PDIP (N8) package configuration. Confirm the suffix #PBF indicates lead-free compliance status as per manufacturer documentation. Ensure the fixed 3.3V output variant is selected rather than the adjustable version. Cross-reference the manufacturer part number against official Analog Devices databases to validate authenticity before procurement.

Voltage Regulators - Linear Regulator Controllers Selection Notes

Select this component when designing microprocessor power stages requiring rapid load transient recovery without bulk capacitance. The fixed 3.3V output simplifies design compared to adjustable versions. Ensure the external N-channel MOSFET selection supports the required RDS(ON) for desired dropout performance. Verify that the system input voltage remains within the 5V to 22V operational limits for stable regulation.

Voltage Regulators - Linear Regulator Controllers Part Context

This part belongs to the LT1575/LT1577 family of ultrafast transient response low dropout regulators. While the LT1575 is a single controller in an 8-pin package, the LT1577 offers dual controllers in a 16-pin package. Both families utilize external N-channel MOSFETs to achieve superior bandwidth and eliminate bulk output capacitors in demanding modern microprocessor applications.

Voltage Regulators - Linear Regulator Controllers Replacement Considerations

Consult factory for additional output voltage combinations available in the LT1577 series. Industrial and military grade parts are available upon request. No direct public substitute part numbers are confirmed in the provided datasheet.