LT1175MPQ#PBF

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The LT1175MPQ#PBF is a negative micropower low dropout regulator manufactured by Analog Devices Inc. It provides a maximum output current of 500mA with a quiescent operating current of 45μA, which reduces to 10μA in shutdown mode. The device features an adjustable current limit selectable at 200mA, 400mA, 600mA, or 800mA via external pins. It operates within a junction temperature range of -55°C to +125°C and is housed in a 5-lead plastic DD-Pak surface mount package.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Micropower operation with 45μA quiescent current and 10μA shutdown current
• Adjustable current limiting for tailored application protection
• Stable with a wide range of output capacitors including ceramic types
• Tolerates reverse output voltage without damage or latchup

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Analog Systems
• Modems
• Instrumentation
• A/D and D/A Converters
• Battery-Powered Systems

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific suffix #PBF indicates lead-free finish compliance. Confirm the MP grade designation matches the required -55°C to +125°C operating temperature range. Ensure the DD-Pak package type aligns with the PCB footprint design. Cross-reference the datasheet electrical characteristics against system requirements for line and load regulation.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component for applications requiring negative voltage regulation with minimal power consumption. The adjustable current limit allows customization for fault protection. Verify that the input-to-output differential voltage remains within absolute maximum ratings. Consider thermal resistance characteristics based on the PCB layout and mounting conditions for the DD-Pak package.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the LT1175 family of negative low dropout regulators. The MP suffix denotes military-grade temperature performance (-55°C to +125°C). The Q suffix identifies the 5-lead plastic DD-Pak package. Other variants include adjustable versions and different package options such as SOIC and TO-220.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

LT1175MPQ-5#PBF offers fixed 5V output instead of adjustable.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

How is the current limit configured?

The current limit is user-selectable at 200mA, 400mA, 600mA, or 800mA by connecting the ILIM2 and ILIM4 pins to the input voltage.

Can the output voltage be reversed?

Yes, the output can be forced to a reverse voltage up to 2V positive with respect to ground without causing damage or latchup.