LP3981IMM-3.03/NOPB

Texas Instruments

Texas Instruments LP3981IMM-3.03/NOPB, single-output positive LDO, fixed 3.03V output, 300mA, 0.2V dropout max at full load, 120µA quiescent, PSRR 50-55dB, 8-VSSOP package, -40°C to 125°C.

Texas Instruments LP3981IMM-3.03/NOPB
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[IN STOCK] In Stock: 5 pcs
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MOQ 1 · Tape & Reel (TR); Cut Tape (CT) · RoHS · EIA-481 · DAP/DDP · T/T

Technical specifications

LP3981IMM-3.03/NOPB specifications
Parameter / AttributeSpecification / Value
Output typeFixed
MountingSurface Mount
Voltage - input6V
Voltage dropout0.2V @ 300mA
Voltage - output (Min (Fixed))3.03V
Output current300mA
Current - supply210 µA
Current - quiescent120 µA
Operating temperature-40°C ~ 125°C
PSRR50dB ~ 55dB (1kHz ~ 10kHz)
PackageTape & Reel (TR); Cut Tape (CT)
Case8-TSSOP, 8-MSOP (0.118\", 3.00mm Width)
Control featuresEnable
Protection featuresOver Current, Over Temperature, Short Circuit
Number of regulators1
Output configurationPositive

Technical details

Fixed 3.03V rail for noise-sensitive loads

PSRR measures 50 dB to 55 dB across the 1 kHz to 10 kHz band, which covers the switching frequency of many DC-DC converters and the audio range. That level of ripple rejection is adequate for powering analog front-ends, codec supplies, or sensor bias rails where a switcher's ripple would otherwise couple into the signal path. Protection features include over-current, over-temperature, and short-circuit shutdown — standard for a modern LDO but worth noting for designs that cannot tolerate a latched fault. The enable pin (active high) allows external sequencing or shutdown control without a separate load switch.

The ROHS3 compliance means no exemption-listed halogens or phthalates — clean for RoHS-driven BOMs.

The NOPB suffix confirms lead-free / RoHS3 compliance, which is the standard for new designs. For BOM planning, this is a straightforward active part to qualify.

LP3981IMM-3.03/NOPB
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