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L4941BV

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STMicroelectronics Linear Voltage Regulators (LDO), TO-220AB-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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L4941BV

STMicroelectronics · Linear Voltage Regulators (LDO) · TO-220AB-3

L4941BV from STMicroelectronics, in a TO-220AB-3. 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 INPUT power_in Unregulated input voltage; forward input voltage is rated to 30 V absolute maximum, with a 16 V input voltage limit stated in the electrical characteristics and reverse input voltage rated to -15 V.
2 GROUND power_in Ground reference for the regulator, connected to the tab on the TO-220 package.
3 OUTPUT power_out Regulated 5 V output (4.8 V to 5.2 V) delivering up to 1 A, with internal current limiting and short circuit protection.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package TO-220AB-3
Category Power Management ICs
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Output voltage VO 4.8 5 5.2 V IO = 5mA to 1A, VI = 6 to 14V 7
Input voltage VI 16 V IO = 5 mA 7
Line regulation ΔVO 5 20 mV VI = 6 to 16V, IO = 5 mA 7
Load regulation ΔVO 8 20 mV IO = 5mA to 1A 7
Load regulation ΔVO 5 15 mV IO = 0.5A to 1A 7
Quiescent current Iq 4 8 mA IO = 5 mA, VI = 6V 7
Quiescent current Iq 20 40 mA IO = 1A, VI = 6V 7
Dropout voltage Vd 250 450 mV IO = 0.5A 7
Dropout voltage Vd 450 700 mV IO = 1A 7
Supply voltage rejection SVR 58 68 dB f = 120Hz, IO = 1A 7
Short circuit current Isc 1.6 2 A VI = 14V 7
Short circuit current Isc 1.8 2.2 A VI = 6V 7
Quiescent current change ΔIq 3 mA IO = 5 mA, VI = 6 to 14V 7
Quiescent current change ΔIq -10 mA IO = 1A, VI = 6 to 14V 7
Output voltage drift ΔVO/ΔT 0.6 mV/°C 7
Output impedance ZO 30 mΩ f = 1KHz, IO = 0.5A 7
Output noise voltage eN 30 µV/VO B = 100Hz to 100KHz 7
Forward input voltage VI 30 V 5
Reverse input voltage VIR -15 V RO=100Ω 5
Storage temperature range Tstg -40 150 °C 5
Operating junction temperature range Top -40 150 °C 5
Thermal resistance junction-case RthJC 3 °C/W TO-220 5
Thermal resistance junction-ambient RthJA 50 °C/W TO-220 5

CAD (KiCad official)

  • Symbol: L4941BV
  • Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
  • 3D model: TO-220AB-3 (KiCad packages3D, STEP)
  • 3D model files: l4941bv-etched.step / l4941bv-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); l4941bv.step / l4941bv.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (17 pp, sha256 a9f11781152d98eb, retrieved 2026-10-27, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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