LP2975AIMMX-5.0

Overview

The LP2975AIMMX-5.0 is a MOSFET LDO Driver/Controller manufactured by Texas Instruments, designed to facilitate high-current low-dropout regulator designs using an external P-channel FET. It features a precision output voltage of 5.0V with a 1.5% accuracy grade and operates within a wide supply voltage range from 1.8V to 24V. The device incorporates a low-power shutdown input drawing less than 1 µA and maintains a typical operating current of 180 µA at 5V. Built-in protections include overtemperature shutdown and current limiting via an external sense resistor. It is housed in an ultra-small VSSOP-8 surface-mount package.

Feature Summary

• Ultra-small VSSOP-8 surface-mount package for space-constrained applications
• Low-power shutdown input with minimal standby current consumption
• Built-in current limit amplifier and overtemperature protection circuitry
• High open-loop gain ensuring excellent regulation and ripple rejection performance

Applications

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

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and temperature rating. Ensure the selected external P-FET meets voltage and current requirements for the intended application. Confirm RoHS compliance status through official datasheets or component databases before procurement.

Selection Notes

Select this controller when designing custom high-current linear regulators requiring precise voltage control. Evaluate the external P-FET's on-resistance and gate threshold voltage to optimize dropout performance. Consider thermal management strategies for the pass element based on maximum load currents and ambient operating conditions.

Part Context

This component belongs to the LP2975 series of LDO controllers from Texas Instruments. The series provides a flexible solution for creating custom linear regulators by pairing the controller with various external P-channel MOSFETs. The 'A' grade designation indicates tighter output voltage accuracy specifications compared to standard grades.

Replacement Considerations

LP2975IMM-5.0/NOPB

FAQ

How is the output voltage determined for the LP2975AIMMX-5.0?

The output voltage is internally trimmed to a standard value of 5.0V for this specific part number.

What mechanism provides short-circuit protection?

Short-circuit protection is implemented by placing a sense resistor in series with the input voltage (VIN), utilizing the device's internal current limit detection circuitry.