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BL1117-CY

Public Made by Adom

by adom

BL Shanghai Belling Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252-2(DPAK). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BL1117-CY

BL Shanghai Belling · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252-2(DPAK)

BL1117-CY from BL Shanghai Belling, in a TO-252-2(DPAK). 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 Adjustable pin, where the 1.25V reference sets the output through R1 and R2 with Vout = 1.25(1+R2/R1)+IAdj*R2 and IAdj about 50uA, and R1 should be 125 ohm or lower and not higher than 625 ohm.
2 Vout power_out Regulated output, with a 1A maximum output current, 1.3V typical dropout at 1A, and a 10uF output capacitor recommended.
3 Vin power_in Input supply, with a maximum input voltage of 12V recommended and 15V as the absolute maximum rating, and a 10uF input capacitor recommended.

Key specifications

Parameter Value
Manufacturer BL Shanghai Belling
Package TO-252-2(DPAK)
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≤1A , Vin=3.25V 3
Line Regulation ΔVout 0.1 0.2 %/V Iout=10mA, 2.75V≤Vin≤12V 3
Load Regulation ΔVout 10 30 mV Vin =2.75V, 10mA≤Iout≤1A 3
Dropout Voltage Vdrop 1.23 1.3 V Iout=100mA 4
Dropout Voltage Vdrop 1.3 1.5 V Iout=1A 4
Minimum Load Current Imin 4 6 10 mA 4
Adjust Pin Current IAdj 35 55 120 uA Vin =5V, 10mA≤Iout≤1A 4
Iadj change Ichange 0.2 10 uA Vin =5V, 10mA≤Iout≤1A 4
Temperature coefficient ΔV/ΔT -100 100 ppm 4
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 10S 2
Input Voltage Range 12 V 2
Operating Junction Temperature Tj -20 125 °C 2
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
Thermal Resistance Junction-to-Case JC 10 °C/W TO-252 4
Thermal Resistance Junction-to-Ambient (No heat sink) JA 92 °C/W TO-252 (No heat sink) 4

CAD (KiCad official)

  • Symbol: BL1117-CY
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252-2(DPAK) (KiCad packages3D, STEP)
  • 3D model files: bl1117-cy-etched.step / bl1117-cy-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bl1117-cy.step / bl1117-cy.glb are 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 2026-10-19, 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