LT1185IQ#PBF

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

The LT1185IQ#PBF is a 3A low dropout regulator featuring adjustable current limit and remote sense capability. It supports positive output with floating input or standard negative regulation with grounded input, covering an output voltage range of 2.5V to 25V. The internal reference voltage maintains ±1% accuracy. Key electrical parameters include a dropout voltage of 0.75V at 3A, quiescent current of 2.5mA, and input voltage limits up to 35V. The device operates within a junction temperature range of -40°C to 150°C.

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

• Utilizes a saturation-limited NPN pass transistor for linear dropout characteristics
• Features accurate programmable current limit via a single external resistor
• Includes shutdown capability controlled by REF pin logic levels
• Provides full remote sense functionality for load regulation improvement

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

• Logic-controlled 3A low-side switch with fault protection
• Positive output regulator with floating input
• Standard negative regulator with grounded input
• Auxiliary regulated supply for switching converters

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

Verify the specific suffix #PBF indicates lead-free compliance when sourcing. Confirm package type matches design requirements, as the IQ designation corresponds to the 5-lead plastic DD package. Ensure thermal management calculations account for the distinct thermal resistance values of the control and power sections under maximum ambient conditions.

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

Select this component for applications requiring high current handling with precise current limiting. Consider the specific thermal resistance differences between the control area and power transistor section for heat sink sizing. Verify that output capacitor ESR meets stability requirements, particularly for remote sense configurations or low-temperature operation.

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

This part belongs to the LT1185 family of low dropout regulators manufactured by Analog Devices. The series is characterized by its ability to function as both a positive and negative regulator. The IQ variant specifically denotes the industrial temperature grade (-40°C to 85°C) housed in the 5-lead plastic DD package.

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

LT1185CQ#TRPBF