LP2975IMM-5.0/NOPB

Overview

The LP2975IMM-5.0/NOPB is a MOSFET LDO Driver/Controller manufactured by Texas Instruments, housed in an 8-lead VSSOP surface-mount package. It operates with an input supply voltage range of 1.8V to 24V and features a typical quiescent current of 180 µA at 5V input. The device provides a standard fixed output voltage of 5.0V with a precision of 1.5% for the 'A' grade. It includes a low-power shutdown input drawing less than 1 µA, built-in current limit amplification, and overtemperature protection.

Feature Summary

• Utilizes an external P-channel MOSFET to deliver ultra-low dropout regulation with extremely low quiescent current.
• Features high open-loop gain to ensure excellent line/load regulation and ripple rejection performance.
• Incorporates a trimmed internal bandgap reference for precise output voltage stability across the operating temperature range.
• Supports user-selectable dropout voltage determined by the sizing of the external FET.

Applications

• High-current 5V to 3.3V regulator designs
• Post-regulator stages for switching converters
• Current-limited power distribution systems

Procurement Notes

Verify that the specific ordering suffix matches the required tolerance grade, as the base part number encompasses multiple variants. Confirm the package designation corresponds to the VSSOP form factor. Ensure the component meets RoHS compliance standards if applicable to your manufacturing requirements. Cross-reference the datasheet revision date against your design specifications to confirm parameter consistency.

Selection Notes

Select this controller when designing custom linear regulators requiring high current capabilities beyond integrated solutions. Evaluate the thermal characteristics of the chosen external P-FET carefully, as the controller does not manage pass-element heat dissipation. Consider the gate drive current limitations when selecting MOSFETs with high capacitance values to maintain stability and transient response.

Part Context

This component belongs to the LP2975 family of LDO controllers produced by Texas Instruments. It serves as a flexible building block for creating custom high-performance linear power supplies. The family allows designers to tailor output voltage and current limits using discrete components rather than relying on fixed internal architectures.

Replacement Considerations

LP2975AIMM-5.0/NOPB