component
MC33269ST-3.3T3G
Public Made by Adomby adom
onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMC33269ST-3.3T3G
onsemi · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4
MC33269ST-3.3T3G from onsemi, in a SOT-223-4. 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 | GND/Adj | power_in | Ground reference terminal for the fixed 3.3 V version; the datasheet labels this pin GND/Adj, and the Adj function applies only to the adjustable versions. |
| 2 | Vout | power_out | Regulated 3.3 V output (3.27 V to 3.33 V at 10 mA and 25°C), which needs an output capacitor of at least 10 µF with ESR between 0.2 Ω and 10 Ω for stability. |
| 3 | Vin | power_in | Unregulated input supply with a maximum rating of 20 V; a bypass capacitor of 0.33 µF or larger is recommended for transient response. |
| 4 | Vout | power_out | Heatsink surface shown as terminal 4 in the case outline, internally connected to pin 2 (Vout), so it carries the regulated output potential. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOT-223-4 |
| Category | Power Management (PMIC) |
| Pins | 4 |
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 Suffix) | VO | 3.27 | 3.3 | 3.33 | V | Iout = 10 mA, TA = 25°C, VCC = 5.3 V | 2 |
| Output Voltage (Line, Load and Temperature, 3.3 Suffix) | VO | 3.23 | 3.3 | 3.37 | V | (1.25 V ≤ Vin − Vout ≤ 15 V, Iout = 500 mA) or (1.35 V ≤ Vin − Vout ≤ 10 V, Iout = 800 mA) | 2 |
| Line Regulation | Regline | 0.3 | % | Iout = 10 mA, Vin = [Vout + 1.5 V] to Vin = 20 V, TA = 25°C | 2 | ||
| Load Regulation | Regload | 0.5 | % | Vin = Vout + 3.0 V, Iout = 10 mA to 800 mA, TA = 25°C | 2 | ||
| Dropout Voltage | Vin − Vout | 1 | 1.25 | V | Iout = 500 mA | 2 | |
| Dropout Voltage | Vin − Vout | 1.1 | 1.35 | V | Iout = 800 mA | 2 | |
| Ripple Rejection | RR | 55 | dB | 10 Vpp, 120 Hz sinewave; Iout = 500 mA | 2 | ||
| Current Limit | ILimit | 800 | mA | Vin − Vout = 10 V | 2 | ||
| Quiescent Current (Fixed Output) | IQ | 5.5 | 8 | mA | 1.5 V ≤ Vout ≤ 3.5 V | 2 | |
| Power Supply Input Voltage | Vin | 20 | V | 2 | |||
| Electrostatic Discharge Sensitivity, Human Body Model | ESD | 4000 | V | Human Body Model (HBM) | 2 | ||
| Electrostatic Discharge Sensitivity, Machine Model | ESD | 400 | V | Machine Model (MM) | 2 | ||
| Operating Ambient Temperature Range | TA | -40 | 125 | °C | MC33269 | 2 | |
| Operating Die Junction Temperature Range | TJ | -40 | 150 | °C | 2 | ||
| Storage Temperature | Tstg | -55 | 150 | °C | 2 | ||
| Minimum Required Load Current, Fixed Output Voltage | ILoad | 8 | mA | Fixed output voltage | 2 | ||
| Thermal Resistance, Junction-to-Ambient (SOT-223) | θJA | 156 | °C/W | Case 318E (SOT-223), TA = 25°C | 2 | ||
| Thermal Resistance, Junction-to-Case (SOT-223) | θJC | 15 | °C/W | Case 318E (SOT-223), TA = 25°C | 2 |
CAD (KiCad official)
- Symbol:
MC33269ST-3.3T3G - Footprint:
Package_TO_SOT_SMD:SOT-223 - 3D model: SOT-223-4 (KiCad packages3D, STEP)
- 3D model files:
mc33269st-3-3t3g-etched.step/mc33269st-3-3t3g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mc33269st-3-3t3g.step/mc33269st-3-3t3g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (15 pp, sha256
f3d4e0daaeb2cc5e, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).