component
BL1084-CY
Public Made by Adomby adom
BL Shanghai Belling Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2. 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
markdownBL1084-CY
BL Shanghai Belling · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2
BL1084-CY from BL Shanghai Belling, in a TO-252-2. 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 | Adj | passive | Adjust pin, which sets the output voltage through two external resistors; adjust pin current is 45 µA typical and 120 µA maximum over 2.85V≤Vin≤4.25V and 10mA≤Iout≤5A. |
| 2 | Vout | power_out | Regulated output, with an adjustable output range of 1.25V to 10V set by the external resistors; the minimum load current is 10mA. |
| 3 | Vin | power_in | Input supply, with a maximum input voltage of 15V and a dropout of 1.4V typical (1.6V maximum) at 5A load current. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BL Shanghai Belling |
| Package | TO-252-2 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reference Voltage | Vref | 1.225 | 1.25 | 1.275 | V | 10mA≤Iout≤5A, 1.5V≤Vin-Vout≤5V | 3 |
| Line Regulation (BL1084-ADJ) | ΔVout | 10 | 40 | mV | Iout=10mA, 2.85V≤Vin≤10V | 3 | |
| Load Regulation (BL1084-ADJ) | ΔVout | 16 | 50 | mV | Vin-Vout=1.6V, 10mA≤Iout≤5A | 3 | |
| Dropout Voltage | Vin-Vout | 1.4 | 1.6 | V | ΔVout, ΔVref =1%, Iout=5A | 4 | |
| Current Limit | Ilimit | 7 | A | Vin-Vout=3V, Tj=25℃ | 4 | ||
| Minimum Load Current (BL1084-ADJ) | 3 | 10 | mA | 4 | |||
| Quiescent Current | Iq | 5 | 10 | mA | Vin=10V | 4 | |
| Adjust Pin Current | IAdj | 45 | 120 | uA | 2.85V≤Vin≤4.25V, 10mA≤Iout≤5A | 4 | |
| Ripple Rejection | 60 | 65 | dB | F=120Hz, Cout=25uF(tan), Iout=5A, Vin-Vout=3V | 4 | ||
| Adjust Pin Current Change | Ichange | 0.4 | 10 | µA | 10mA≤Iout≤5A, 1.5V≤Vin-Vout≤6V | 4 | |
| Temperature Stability | 0.5 | % | Iout=10mA, Vin-Vout=1.5V | 4 | |||
| Max Input Voltage | 15 | V | 2 | ||||
| Operating Junction Temperature (Tj) | Tj | 150 | C | 2 | |||
| Ambient Temperature (Ta) | Ta | -40 | C | Printed as -40C -85C; upper value printed as -85C, not transcribed (see review_required) | 2 | ||
| Storage Temperature (Ts) | Ts | -40 | C | Printed as -40C -150C; upper value not transcribed (see review_required) | 2 | ||
| Lead Temperature | 260 | C | 10S | 2 | |||
| Input Voltage Range (recommended) | 15 | V | 2 | ||||
| Operating Junction Temperature (Tj, recommended) | Tj | -20 | C | Printed as -20C -125C; upper value not transcribed (see review_required) | 2 | ||
| Thermal Resistance Junction to Case (TO-252) | JC | 12.5 | ℃ / W | 4 | |||
| Package Thermal Resistance (TO-252) | 6 | ℃ / W | 2 | ||||
| Over Temperature Protection | 150 | ℃ | 4 |
CAD (KiCad official)
- Symbol:
BL1084-CY - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252-2 (KiCad packages3D, STEP)
- 3D model files:
bl1084-cy-etched.step/bl1084-cy-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bl1084-cy.step/bl1084-cy.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BL Shanghai Belling datasheet (13 pp, sha256
bb5efe271c8036b3, 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).