# ST732M33R

**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5

ST732M33R from STMicroelectronics, 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 | GND | power_in | Ground reference pin; all datasheet voltage ratings are referred to GND. |
| 2 | VIN | power_in | Input voltage pin with an operating range of 2.5 V to 28 V and an absolute maximum DC input of -0.3 to 30 V. |
| 3 | VOUT | power_out | Regulated output voltage pin, which is 3.3 V for ST732M33R, with output current up to 300 mA. |
| 4 | NC | unconnected | Not internally connected. |
| 5 | NC | unconnected | Not internally connected. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| DC input voltage operating range | VIN | 2.5 |  | 28 | V |  | 6 |
| Output voltage accuracy at TJ = 25 °C | VOUT | -1 |  | 1 | % | TJ = 25 °C | 6 |
| Output voltage accuracy over temperature | VOUT | -3 |  | 3 | % | -40 °C < TJ < +125 °C | 6 |
| Static line regulation | ΔVOUT |  | 0.01 | 0.05 | %/V | VIN = VOUT(NOM) + 1 V to 28 V | 6 |
| Dropout voltage | VDROP |  | 200 | 350 | mV | IOUT = 100 mA, VIN = VOUT(NOM) - 0.1 V | 6 |
| Dropout voltage | VDROP |  | 600 | 1200 | mV | IOUT = 300 mA, VIN = VOUT(NOM) - 0.1 V | 6 |
| Quiescent current | IQ |  | 5 | 10 | µA | IOUT = 0 mA | 6 |
| Quiescent current | IQ |  | 120 | 200 | µA | IOUT = 300 mA | 6 |
| Output noise voltage | eN |  | 70 |  | µVRMS/VOUT | f = 10 Hz to 100 kHz, IOUT = 10 mA COUT = 1 µF | 6 |
| Thermal shutdown | TSHDN |  | 160 |  | °C |  | 6 |
| Thermal shutdown hysteresis |  |  | 20 |  | °C |  | 6 |
| DC input voltage absolute maximum | VIN | -0.3 |  | 30 | V | All values are referred to GND | 5 |
| DC output voltage absolute maximum | VOUT | -0.3 |  | 14 | V | All values are referred to GND | 5 |
| Storage temperature range | TST | -65 |  | 150 | °C |  | 5 |
| Operating temperature range | TOP | -40 |  | 125 | °C |  | 5 |
| Thermal resistance junction-ambient | RthJA |  | 190 |  | °C/W | 4-layer (2S2P) JEDEC test board per JESD 51-7 | 5 |
| Thermal resistance junction-case | RthJC |  | 75 |  | °C/W |  | 5 |
| Human body model ESD | HBM | -2 |  | 2 | kV |  | 5 |
| Charged device model ESD | CDM | -500 |  | 500 | V |  | 5 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | PCB copper area through the package leads. The PCB copper area acts as a heat sink. The footprint copper | 7 |

## CAD (KiCad official)

- Symbol: `ST732M33R`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `st732m33r-etched.step` / `st732m33r-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `st732m33r.step` / `st732m33r.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/st732m33r.pdf) (21 pp, sha256 `f8cd0ca941e65a14`, retrieved 2026-11-05, tier: manufacturer)
- **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](docs/st732m33r-datasheet.pdf)