component
BL8503-30PSM
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.
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
markdownBL8503-30PSM
BL Shanghai Belling · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3
BL8503-30PSM 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 reference pin for the regulator (listed as 'Ground' in the pin description table for the SOT-89-3 (SM) package). |
| 2 | Vin | power_in | Supply voltage input; the datasheet gives an input voltage range of 1.5V to 10V and an absolute maximum input voltage of 10V. |
| 3 | Vout | power_out | Regulated output voltage; for the BL8503-30PSM this is 3.0V (2.94V to 3.06V), with output current limited to 250mA maximum. |
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 | |
| Output Voltage Temperature Coefficient | T Vout/Vout | 50 | ppm/C | Iout=10mA | 6 | ||
| Input Voltage | Vin | 8 | V | 5 | |||
| Maximum Output Current | Iout(Max.) | 250 | mA | Vin=4V, Vout>2.94V | 5 | ||
| Dropout Voltage | Vin-Vout | 170 | 300 | mV | Iout=100mA | 5 | |
| Dropout Voltage | Vin-Vout | 320 | 500 | mV | Iout=200mA | 5 | |
| Line Regulation | Vout/Vout per V | 0.2 | 0.3 | %/V | Iout=40mA, 3.2V≤Vin≤8V | 5 | |
| Load Regulation | Vout | 20 | 40 | mV | Vin=4.0V, 1mA≤Iout≤100mA | 6 | |
| Quiescent Current | Iq | 3 | 5 | uA | Vin=4V | 6 | |
| Input Voltage (absolute maximum) | Vin | 10 | V | Max input voltage | 4 | ||
| Junction Temperature | TJ | 125 | C | 4 | |||
| Ambient Temperature (absolute maximum) | TA | -40 | 85 | C | 4 | ||
| Power Dissipation SOT-89-3 | PD | 0.5 | W | SOT-89-3 package | 4 | ||
| Storage Temperature | Ts | -45 | 150 | C | 4 | ||
| Lead Temperature | 260 | C | 10S | 4 | |||
| Input Voltage Range (recommended) | Vin | 8 | V | 4 | |||
| Ambient Temperature (recommended) | TA | -40 | 125 | C | 4 |
CAD (KiCad official)
- Symbol:
BL8503-30PSM - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89-3 (KiCad packages3D, STEP)
- 3D model files:
bl8503-30psm-etched.step/bl8503-30psm-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bl8503-30psm.step/bl8503-30psm.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BL Shanghai Belling datasheet (13 pp, sha256
8f6684221c2cf4c4, 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).