component

MC33275ST-3.3T3G

Public Made by Adom

by adom

onsemi MC33275ST 3 3T3G Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

componentpmicmc33275st-3.3t3g
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
Download ZIP Propose a change
Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs mc33275st-3-3t3g: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the pla… · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
mc33275st-3-3t3g-etched.fit.json mc33275st-3-3t3g: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
mc33275st-3-3t3g-etched.glb mc33275st-3-3t3g: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the pla… · Ray
mc33275st-3-3t3g-etched.step mc33275st-3-3t3g: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the pla… · Ray
mc33275st-3-3t3g.glb Publish 0.1.0 · Ray
mc33275st-3-3t3g.kicad_mod fix footprint: SOT-223-3_TabPin2 -> SOT-223 (symbol has pins 1,2,3,4; the old footprint left pad(s) with no net) · Ray
mc33275st-3-3t3g.kicad_sym Publish 0.1.0 · Ray
mc33275st-3-3t3g.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
mc33275st-3-3t3g.step Publish 0.1.0 · Ray
package.json Publish 0.2.0 · Ray
pads.json fix footprint: SOT-223-3_TabPin2 -> SOT-223 (symbol has pins 1,2,3,4; the old footprint left pad(s) with no net) · Ray
page.json mc33275st-3-3t3g: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the pla… · Ray
README.md mc33275st-3-3t3g: specified limits as data (metadata.characteristics, 24 rows from the datasheet) · Ray

MC33275ST-3.3T3G

onsemi · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223

MC33275ST-3.3T3G from onsemi, in a SOT-223. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 Vin power_in Unregulated input supply. Absolute maximum 13 Vdc; operating range typically [Vout + 1 V] to 12 V. Input capacitor recommended for stability and transient response.
2 GND power_in Ground reference for the regulator. Connect to system ground; ties to the tab (pin 4) internally on the SOT-223 package.
3 Vout power_out Regulated 3.3 V output (3.267 V min / 3.30 V typ / 3.333 V max at 25°C). Supplies up to 300 mA. Requires at least 0.33 µF output capacitance for stability; 1.0 µF or larger recommended for best transient response.
4 GND power_in Ground tab (heat-spreading pad) on the SOT-223 package. Electrically connected to pin 2; solder to a copper ground pour for thermal dissipation.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOT-223
Category PMIC
Pins 4

Ordering variants

Same part, different packaging or reel option.

  • MC33275ST-3.3T3G
  • MC33275ST-3.3T3GD
  • MC33275ST-3.3T3GDT
  • MC33275ST-3.3T3GMN

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 (3.3 V suffix), IO = 0 to 250 mA, TA = 25 C VO 3.267 3.3 3.333 V IO = 0 mA to 250 mA, TA = 25°C, Vin = [VO + 1] V 3
Output Voltage (3.3 V suffix), 2% tolerance, TJ = -40 to +125 C VO 3.234 3.366 V Vin = [VO + 1] V, 0 < IO < 100 mA, 2% Tolerance from TJ = −40 to +125°C 3
Line Regulation Regline 2 10 mV Vin = [VO + 1] V to 12 V, IO = 250 mA, All Suffixes TA = 25°C 3
Load Regulation Regload 5 25 mV Vin = [VO + 1] V, IO = 0 mA to 250 mA, All Suffixes TA = 25°C 3
Dropout Voltage Vin − VO 25 100 mV IO = 10 mA, TJ = −40°C to +125°C 3
Dropout Voltage Vin − VO 115 200 mV IO = 100 mA 3
Dropout Voltage Vin − VO 220 400 mV IO = 250 mA 3
Dropout Voltage Vin − VO 260 500 mV IO = 300 mA 3
Ripple Rejection (120 Hz) 65 75 dB Vin(peak−peak) = [VO + 1.5] V to [VO + 5.5] V 3
Quiescent Current ON Mode IQOn 125 200 µA Vin = [VO + 1] V, IO = 0 mA 3
Quiescent Current ON Mode SAT (3.3 V suffix) IQSAT 1500 2000 µA Vin = [VO − 0.5] V, IO = 0 mA (Notes 2, 3) 3
Current Limit ILIMIT 450 mA Vin = [VO + 1] V, VO Shorted 3
Thermal Shutdown 150 °C 3
Output Noise Voltage (CL = 1.0 µF) Vn 160 Vrms CL = 1.0 µF, IO = 50 mA (10 Hz to 100 kHz) 3
Output Noise Voltage (CL = 200 µF) Vn 46 Vrms CL = 200 µF, IO = 50 mA (10 Hz to 100 kHz) 3
Input Voltage VCC 13 Vdc 2
Output Current IO 300 mA 2
Maximum Junction Temperature TJ 150 °C 2
Operating Ambient Temperature Range TA -40 125 °C 2
Storage Temperature Range Tstg -65 150 °C 2
ESD Human Body Model (HBM) ESD 4000 V Human Body Model (HBM) 2
ESD Machine Model (MM) ESD 400 V Machine Model (MM) 2
Thermal Resistance, Junction-to-Air (SOT-223, ST suffix) RJA 245 °C/W Case 318E (SOT−223) ST Suffix 2
Thermal Resistance, Junction-to-Case (SOT-223, ST suffix) RJC 15 °C/W Case 318E (SOT−223) ST Suffix 2

CAD (KiCad official)

  • Symbol: MC33275ST-3.3T3G
  • Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
  • 3D model: SOT-223 (KiCad packages3D, STEP)
  • 3D model files: mc33275st-3-3t3g-etched.step / mc33275st-3-3t3g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mc33275st-3-3t3g.step / mc33275st-3-3t3g.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
mc33275st-3-3t3g.step 64 KB You want the bare part, or you mark your own boards.
mc33275st-3-3t3g-etched.step 3.0 MB You want the part with MC33275ST-3.3T3G already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 715 faces against 75 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

  • Datasheet: onsemi datasheet (14 pp, sha256 684d39955a0981fe, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF