component
BL1117-ADJCY
Public Made by Adomby adom
BL Shanghai Belling Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2. Pinout extracted from 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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Contents
README
markdownBL1117-ADJCY
BL Shanghai Belling · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2
BL1117-ADJCY from BL Shanghai Belling, in a TO-252-2. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Adj | input | Adjust pin. Feedback input regulated to 1.25 V (Vref) reference. Output voltage set by Vout = 1.25 x (1 + R2/R1) + IAdj x R2 using external resistor divider (R1 recommended <=125 ohm to meet minimum load, and <=625 ohm for stability). IAdj is typically 55 uA (max 120 uA). |
| 2 | Vout | power_out | Regulated output. Delivers up to 1 A. Requires a 10 uF tantalum or MLCC output capacitor for stability (ESR 3 mOhm to 22 Ohm). On TO-252 the exposed tab is electrically the Vout pin. |
| 3 | Vin | power_in | Unregulated supply input. Recommended operating range up to 12 V (absolute max 15 V). Requires a 10 uF tantalum or MLCC bypass capacitor. Must exceed Vout by at least the dropout voltage (~1.3 V at 1 A). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | BL Shanghai Belling |
| Package | TO-252-2 |
| Category | PMIC |
| Pins | 3 |
Ordering variants
Same part, different packaging or reel option.
BL1117-ADJCYBL1117-ADJCYADJAYBL1117-ADJCXBL1117-ADJCYADJAX
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 (BL1117-ADJ) | Vref | 1.225 | 1.25 | 1.275 | V | 10mA≤Iout≤1A, Vin=3.25V | 3 |
| Line Regulation (BL1117-ADJ) | ΔVout | 0.1 | 0.2 | %/V | Iout=10mA, 2.75V≤Vin≤12V | 3 | |
| Load Regulation (BL1117-ADJ) | ΔVout | 10 | 30 | mV | Vin=2.75V, 10mA≤Iout≤1A | 3 | |
| Dropout Voltage at 100mA | Vdrop | 1.23 | 1.3 | V | Iout=100mA | 4 | |
| Dropout Voltage at 1A | Vdrop | 1.3 | 1.5 | V | Iout=1A | 4 | |
| Current Limit | Ilimit | 1 | A | Vin-Vout=2V, Tj=25°C | 4 | ||
| Supply Voltage Rejection | SVR | 60 | dB | f = 120Hz, VIN − VOUT = 3V + 1VPP Ripple | 4 | ||
| Minimum Load Current (BL1117-ADJ) | Imin | 4 | 6 | 10 | mA | 4 | |
| Adjust Pin Current (BL1117-ADJ) | IAdj | 35 | 55 | 120 | uA | Vin =5V, 10mA≤Iout≤1A | 4 |
| Adjust Pin Current Change (BL1117-ADJ) | Ichange | 0.2 | 10 | uA | Vin =5V, 10mA≤Iout≤1A | 4 | |
| Temperature Coefficient of Reference Voltage | ΔV/ΔT | -100 | 100 | ppm | 4 | ||
| Input Voltage Range | 12 | V | 2 | ||||
| Operating Junction Temperature | Tj | -20 | 125 | °C | 2 | ||
| Max Input Voltage | 15 | V | 2 | ||||
| Max Operating Junction Temperature | Tj | 150 | °C | 2 | |||
| Ambient Temperature | Ta | -40 | 85 | °C | 2 | ||
| Storage Temperature | Ts | -40 | 150 | °C | 2 | ||
| Lead Temperature | 260 | °C | 10 s | 2 | |||
| Thermal Resistance Junction-to-Case (TO-252) | JC | 10 | °C/W | 4 | |||
| Thermal Resistance Junction-to-Ambient (TO-252, no heat sink) | JA | 92 | °C/W | No air flow, no heat sink | 4 |
CAD (KiCad official)
- Symbol:
BL1117-ADJCY - Footprint:
Package_TO_SOT_SMD:TO-252-2 - 3D model: TO-252-2 (KiCad packages3D, STEP)
- 3D model files:
bl1117-adjcy-etched.step/bl1117-adjcy-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bl1117-adjcy.step/bl1117-adjcy.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: BL Shanghai Belling datasheet (15 pp, sha256
a7fe7f5c0846d4ca, retrieved 2026-08-17, tier: lcsc) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).