# BDP7533A-R

**Bardeen Micro** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23

BDP7533A-R from Bardeen Micro, in a SOT-23. 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 pin; the datasheet requires a 1 uF input capacitor between VIN and GND, placed within 1 cm of the input pin and connected to a clean analog ground. |
| 2 | VOUT | power_out | Regulated output of the fixed 3.3 V LDO; the datasheet requires at least 1 uF from VOUT to GND for stability (output capacitor within 1 cm of the output pin) and states an output accuracy of -2% to +2%. |
| 3 | VIN | power_in | DC input supply; the input voltage range is 3 V to 40 V, and VIN must always remain above VOUT during power-down for correct operation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Bardeen Micro |
| Package | SOT-23 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Input voltage range |  | 3 |  | 40 | V |  | 3 |
| Output voltage range |  | 3 |  | 12 | V |  | 3 |
| Output accuracy |  | -2 |  | 2 | % |  | 3 |
| Ground supply current |  |  | 5 | 10 | uA | No load | 3 |
| Max output current |  |  |  | 150 | mA | Vin-Vout=2V | 3 |
| Line regulation |  |  | 0.01 | 0.1 | %V | Iload=1mA | 3 |
| Load regulation |  |  | 2 | 4 | % | Iload=1-100mA | 3 |
| Dropout voltage |  |  | 740 | 1000 | mV | Iload=100mA | 3 |
| DC voltage input | VIN |  |  | 42 | V |  | 3 |
| Output voltage |  | -0.3 | 3.3 | 20 | V |  | 3 |
| Operating temperature range |  | -40 |  | 85 | ℃ |  | 3 |
| Storage temperature range |  | -55 |  | 125 | ℃ |  | 3 |
| Operating junction temperature (Tj) | Tj |  |  | 125 | ℃ |  | 3 |
| ESD human body model |  |  |  | 2 | KV | Human body mode | 3 |
| Lead temperature and time |  |  |  | 260 | ℃ | 时间少于 10S | 3 |
| Current limit |  |  | 200 |  | mA |  | 3 |
| Short current |  |  | 200 |  | mA |  | 3 |
| Power supply rejection ratio PSRR@100Hz | PSRR |  | 65 |  | dB | Vin=Vout+0.5V, Iload=1mA | 3 |
| Startup time |  |  | 500 |  | uS |  | 3 |
| OTP (over-temperature protection threshold) |  |  | 165 |  | ℃ |  | 3 |
| OTP hysteresis |  |  | 30 |  | ℃ |  | 4 |

## CAD (KiCad official)

- Symbol: `BDP7533A-R`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bdp7533a-r-etched.step` / `bdp7533a-r-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bdp7533a-r.step` / `bdp7533a-r.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Bardeen Micro datasheet](docs/bdp7533a-r-datasheet.pdf) (8 pp, sha256 `5aeccbc682078f95`, retrieved 2026-10-17, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/bdp7533a-r-datasheet.pdf)