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Texas Instruments LM1117IDTX-ADJ/NOPB — Analog & Data Acquisition

Texas Instruments LM1117IDTX-ADJ/NOPB Adjustable LDO, 800 mA

MPNLM1117IDTX-ADJ/NOPB
Active

Texas Instruments LM1117 series, Positive Adjustable LDO Regulator, 1 Output, 800mA, TO-252-3, DPak (2 Leads + Tab), SC-63, Surface Mount, -40°C~125°C.

$1.4800Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM1117IDTX-ADJ/NOPB specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Voltage - input15V
Voltage dropout1.2V @ 800mA
Voltage - output13.8V
Voltage - output (Min (Fixed))1.25V
Output current800mA
Current - supply10 mA
Current - quiescent5 mA
Operating temperature-40°C~125°C
PSRR75dB (120Hz)
PackageTape & Reel (TR); Cut Tape (CT)
CaseTO-252-3, DPak (2 Leads + Tab), SC-63
Protection featuresOver Current, Over Temperature
Number of regulators1
Output configurationPositive

Product details

800 mA adjustable LDO — dropout budget and thermal land

The LM1117IDTX-ADJ/NOPB: Maximum dropout is 1.2 V at 800 mA load. The TO-252-3 (DPak) surface-mount package has an exposed tab on the bottom — that tab is the thermal path.

PSRR and protection — ripple rejection and fault tolerance

PSRR is 75 dB at 120 Hz. Built-in over-current and over-temperature protection let the part survive a sustained short on the output or a high ambient temperature without destructive failure. The thermal shutdown threshold is above the 125°C operating max, so the protection acts as a safety net rather than a normal operating limit.

The base product number LM1117 covers multiple fixed-voltage siblings, but this adjustable variant is the one to stock if your BOM needs to cover several output voltages from a single qualified LDO.

Frequently asked questions

What output voltages can LM1117IDTX-ADJ/NOPB produce?

The output is adjustable from a minimum of 1.25 V up to a maximum of 13.8 V, set by two external feedback resistors.

Can LM1117IDTX-ADJ/NOPB handle 800 mA continuous?

Yes, the rated output current is 800 mA. At that load the maximum dropout voltage is 1.2 V, so the input must be at least 1.2 V above the target output. Thermal management through the TO-252-3 tab is required to stay within the 125°C operating limit.

Does LM1117IDTX-ADJ/NOPB work with a 5 V input?

Yes, as long as the output voltage is at least 1.2 V below the input. For a 3.3 V output, a 5 V input provides 1.7 V headroom, which exceeds the 1.2 V maximum dropout. For a 5 V output, the input must be at least 6.2 V.

What is the PSRR of LM1117IDTX-ADJ/NOPB?

PSRR is specified at 75 dB at 120 Hz. This means the output attenuates 120 Hz input ripple by a factor of about 5600, which is useful for post-rectifier rails feeding sensitive analog or RF stages.