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LM4121IM5-ADJ

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Texas Instruments Voltage Reference, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)lm4121im5-adjfactory-2.0.0extractor-text
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LM4121IM5-ADJ

Texas Instruments · Voltage Reference · SOT-23-5

LM4121IM5-ADJ from Texas Instruments, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 Adj input VOUT Adjust pin for the adjustable option, used with feedback resistors R1 and R2 (keep each below 1 MΩ); its bias current is typically 15 nA and at most 40 nA flowing out of the pin, and the pin is sensitive to noise and capacitive loading.
2 GND power_in Negative supply or ground connection for the device; a single-point ground to the LM4121 helps ensure good accuracy at high load currents.
3 EN input Enable input that is pulled to the input supply for normal operation; about 6 µA into the pin is required to turn the part on, it must be taken close to GND to turn the output off, a minimum slew rate of about 0.003 V/µs is needed to avoid output glitches, and floating the pin is not recommended.
4 VIN power_in Positive supply input, specified for 1.8 V ≤ VIN ≤ 12 V, with the input and enable pins rated from −0.3 V to 14 V absolute maximum.
5 VOUT output Reference output that sources and sinks up to ±5 mA and tolerates indefinite output short-circuit duration.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23-5
Category Power Management (PMIC)
Pins 5

CAD (KiCad official)

  • Symbol: LM4121IM5-ADJ
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: lm4121im5-adj-etched.step / lm4121im5-adj-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm4121im5-adj.step / lm4121im5-adj.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (23 pp, sha256 0ca0016b3d710f20, retrieved 2026-10-11, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF