component
BL8503-33PSM
Public Made by Adomby adom
BL Shanghai Belling Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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BL8503-33PSM
BL Shanghai Belling · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3
BL8503-33PSM from BL Shanghai Belling, in a SOT-89-3. 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 | Vss | power_in | Ground pin for the regulator, as listed in the pin description table for the SOT-89-3 (SM) column. |
| 2 | Vin | power_in | Supply voltage input, with an input voltage range of 1.5V to 10V in the features and a maximum input voltage of 10V in the absolute maximum ratings. |
| 3 | Vout | power_out | Regulated output voltage, with an output voltage range of 1.2V to 6.0V in 0.1V steps per the features list. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BL Shanghai Belling |
| Package | SOT-89-3 |
| 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 |
|---|---|---|---|---|---|---|---|
| Output Voltage | Vout | 2.94 | 3 | 3.06 | V | 5 | |
| Maximum Output Current | Iout(Max.) | 250 | mA | Vin=4V,Vout>2.94V | 5 | ||
| Dropout Voltage (Input-Output Voltage Differential) | Vin-Vout | 170 | 300 | mV | Iout=100mA | 5 | |
| Dropout Voltage (Input-Output Voltage Differential) | Vin-Vout | 320 | 500 | mV | Iout=200mA | 5 | |
| Line Regulation | 0.2 | 0.3 | %/V | Iout=40mA, 3.2V≤Vin≤8V | 5 | ||
| Load Regulation | 20 | 40 | mV | Vin=4.0V, 1mA≤Iout≤100mA | 6 | ||
| Quiescent Current | Iq | 3 | 5 | uA | Vin=4V | 6 | |
| Output Voltage Temperature Coefficient | 50 | ppm/C | Iout=10mA | 6 | |||
| Input Voltage | Vin | 8 | V | 4 | |||
| Input Voltage Range | Vin | 8 | V | 4 | |||
| Ambient Temperature | TA | -40 | 125 | C | 4 | ||
| Max Input Voltage | 10 | V | 4 | ||||
| Junction Temperature | TJ | 125 | C | 4 | |||
| Ambient Temperature | TA | -40 | 85 | C | 4 | ||
| Power Dissipation | 0.5 | W | SOT-89-3 package | 4 | |||
| Storage Temperature | Ts | -45 | 150 | C | 4 | ||
| Lead Temperature | 260 | C | 10S | 4 |
CAD (KiCad official)
- Symbol:
BL8503-33PSM - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files:
bl8503-33psm-etched.step/bl8503-33psm-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bl8503-33psm.step/bl8503-33psm.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BL Shanghai Belling datasheet (13 pp, sha256
96cd8edb3cb3fa27, retrieved 2026-10-18, 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).
# BL8503-33PSM
**BL Shanghai Belling** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3
BL8503-33PSM from BL Shanghai Belling, in a SOT-89-3. 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 | Vss | power_in | Ground pin for the regulator, as listed in the pin description table for the SOT-89-3 (SM) column. |
| 2 | Vin | power_in | Supply voltage input, with an input voltage range of 1.5V to 10V in the features and a maximum input voltage of 10V in the absolute maximum ratings. |
| 3 | Vout | power_out | Regulated output voltage, with an output voltage range of 1.2V to 6.0V in 0.1V steps per the features list. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BL Shanghai Belling |
| Package | SOT-89-3 |
| 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 |
|---|---|---|---|---|---|---|---|
| Output Voltage | Vout | 2.94 | 3 | 3.06 | V | | 5 |
| Maximum Output Current | Iout(Max.) | 250 | | | mA | Vin=4V,Vout>2.94V | 5 |
| Dropout Voltage (Input-Output Voltage Differential) | Vin-Vout | | 170 | 300 | mV | Iout=100mA | 5 |
| Dropout Voltage (Input-Output Voltage Differential) | Vin-Vout | | 320 | 500 | mV | Iout=200mA | 5 |
| Line Regulation | | | 0.2 | 0.3 | %/V | Iout=40mA, 3.2V≤Vin≤8V | 5 |
| Load Regulation | | | 20 | 40 | mV | Vin=4.0V, 1mA≤Iout≤100mA | 6 |
| Quiescent Current | Iq | | 3 | 5 | uA | Vin=4V | 6 |
| Output Voltage Temperature Coefficient | | | | 50 | ppm/C | Iout=10mA | 6 |
| Input Voltage | Vin | | | 8 | V | | 4 |
| Input Voltage Range | Vin | | | 8 | V | | 4 |
| Ambient Temperature | TA | -40 | | 125 | C | | 4 |
| Max Input Voltage | | | | 10 | V | | 4 |
| Junction Temperature | TJ | | | 125 | C | | 4 |
| Ambient Temperature | TA | -40 | | 85 | C | | 4 |
| Power Dissipation | | | | 0.5 | W | SOT-89-3 package | 4 |
| Storage Temperature | Ts | -45 | | 150 | C | | 4 |
| Lead Temperature | | | | 260 | C | 10S | 4 |
## CAD (KiCad official)
- Symbol: `BL8503-33PSM`
- Footprint: `Package_TO_SOT_SMD:SOT-89-3`
- 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files: `bl8503-33psm-etched.step` / `bl8503-33psm-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bl8503-33psm.step` / `bl8503-33psm.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [BL Shanghai Belling datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586181645652643840) (13 pp, sha256 `96cd8edb3cb3fa27`, retrieved 2026-10-18, tier: lcsc)
- **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/bl8503-33psm-datasheet.pdf)