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Texas Instruments LP2985AIM5X-3.1/NOPB — Power Management (PMIC / Gate Driver)

Texas Instruments LP2985AIM5X-3.1/NOPB LDO, 3.1V, 150mA

MPNLP2985AIM5X-3.1/NOPB
End of Life

Texas Instruments LP2985AIM5X-3.1/NOPB fixed-output LDO, 3.1V, 150mA, 45dB PSRR at 1kHz, SOT-23-5, active.

$0.97Ref. price · indicative, final on quote
PackagingSC-74A, SOT-753
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LP2985AIM5X-3.1/NOPB specifications
ParameterValue
Output typeFixed
MountingSurface Mount
Voltage - input16V
Voltage dropout0.58V @ 150mA
Voltage - output (Min (Fixed))3.1V
Output current150mA
Current - supply2.5 mA
Current - quiescent95 µA
Operating temperature-40°C ~ 125°C
PSRR45dB (1kHz)
PackageTape & Reel (TR); Cut Tape (CT)
CaseSC-74A, SOT-753
Control featuresEnable
Protection featuresOver Current, Over Temperature, Short Circuit
Number of regulators1
Output configurationPositive

Product details

3.1V fixed rail for noise-sensitive loads

The LP2985AIM5X-3.1/NOPB: Its 45 dB PSRR at 1 kHz means it attenuates ripple from a switching pre-regulator by a factor of ~178 — useful for powering analog front-ends or sensor bias rails where a clean 3.1V bus is non-negotiable. The 95 µA quiescent current keeps standby drain low for battery-operated equipment that spends most of its time in sleep.

Industrial temperature and protection suite

The Enable pin lets a host MCU gate the output rail, and built-in over-current, over-temperature, and short-circuit protection cover the common fault modes without external supervisory circuitry. The control and protection features reduce external component count, simplifying layout and BOM.

The NOPB suffix confirms lead-free construction; no special handling beyond standard MSL is required.

Frequently asked questions

What is the PSRR of this LDO at 1 kHz?

The power-supply rejection ratio is 45 dB at 1 kHz. This means ripple on the input rail is attenuated by a factor of about 178 at that frequency — enough to keep a clean 3.1V output from a switching pre-regulator.

What compliance documentation does Texas Instruments provide?

The part is ROHS3 compliant per the manufacturer's declaration. Texas Instruments publishes a RoHS certificate and material declaration; no UL or IEC certification is listed in the standard product documentation.