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BL8072COTR33

Public Made by Adom

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BL Shanghai Belling Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
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docs bl8072cotr33: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · Ray 24d ago
viewers bl8072cotr33: viewers · Ray 2mo ago
bl8072cotr33-etched.fit.json bl8072cotr33: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
bl8072cotr33-etched.glb bl8072cotr33: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · Ray 24d ago
bl8072cotr33-etched.step bl8072cotr33: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · Ray 24d ago
bl8072cotr33.glb Publish 0.1.0 · Ray 2mo ago
bl8072cotr33.kicad_mod Publish 0.1.0 · Ray 2mo ago
bl8072cotr33.kicad_sym Publish 0.1.0 · Ray 2mo ago
bl8072cotr33.lbr Publish 0.1.0 · Ray 2mo ago
bl8072cotr33.step Publish 0.1.0 · Ray 2mo ago
package.json Publish 0.2.0 · Ray 2mo ago
page.json bl8072cotr33: etch along the lead row, tab up; full MPN text (service-occt 1.9.3) (service-occt 1.6.0, from the plain S… · Ray 24d ago
README.md bl8072cotr33: specified limits as data (metadata.characteristics, 19 rows from the datasheet) · Ray 24d ago

BL8072COTR33

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

BL8072COTR33 from BL Shanghai Belling, in a TO-252. 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 Vss/ADJ power_in Ground / adjust pin. Tie to GND for the fixed-voltage version (BL8072COTR33 = fixed 3.3V). In adjustable configurations this pin is driven by an external R1/R2 divider from Vout; adjust-pin current IAdj is ~2µA.
2 VOUT power_out Regulated output. Fixed 3.3V ±2% for the BL8072COTR33 order code. Supplies up to 2A (Vin-Vout ≥ 1V for Vout ≥ 2.0V). Requires a 1µF ceramic output capacitor to GND for stability.
3 VDD power_in Input supply. Absolute max 20V, recommended operating max 18V. Requires a 1µF ceramic bypass capacitor to GND. For 3.3V output (COTR33) recommended Vin ≥ ~4.3V for full spec operation.

Key specifications

Parameter Value
Manufacturer BL Shanghai Belling
Package TO-252
Category PMIC
Pins 3

Ordering variants

  • BL8072COTR33
  • BL8072COTR33CLTR

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Input Voltage Vin 18 V 3
Maximum Output Current Iout(Max.) 2 A Vin-Vout=1.5V, 1.5V≤Vout<2.0V 3
Dropout Voltage 1600 1800 mV Iout1.5A, Vout <1.5V 3
Dropout Voltage 1200 1400 mV Iout1.5A, 1.5V≤Vout<2.0V 3
Dropout Voltage 850 950 mV Iout1.5A, Vout ≥2.0V 3
Line Regulation 0.1 0.3 %/V Iout=10mA, Set Vout+1V≤Vin≤18V 3
Load Regulation 40 60 mV 1mA≤Iout≤1.5A, Vout <1.5V 3
Load Regulation 20 40 mV 1mA≤Iout≤1.5A, 1.5V≤Vout<2.0V 3
Load Regulation 10 30 mV 1mA≤Iout≤1.5A, Vout ≥2.0V 3
Quiescent Current Iq 3 5 uA Vin=Set Vout+1V 3
Output Voltage Temperature Coefficient 200 ppm/°C Iout=100mA 3
Thermal Resistance Junction to Case (TO-252) θJC 12 °C/W Junction to case, TO-252 3
Max Input Voltage 20 V 2
Operating Junction Temperature Tj 125 °C 2
Ambient Temperature Ta -40 85 °C 2
Storage Temperature Ts -40 150 °C 2
Lead Temperature 260 °C 10 s 2
Input Voltage Range Vin 18 V 2
Ambient Temperature Ta -40 85 °C 2

CAD (KiCad official)

  • Symbol: BL8072COTR33
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252 (KiCad packages3D, STEP)
  • 3D model files: bl8072cotr33-etched.step / bl8072cotr33-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bl8072cotr33.step / bl8072cotr33.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
bl8072cotr33.step 119 KB You want the bare part, or you mark your own boards.
bl8072cotr33-etched.step 2.4 MB You want the part with BL8072COTR33 already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 582 faces against 83 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: BL Shanghai Belling datasheet (7 pp, sha256 a3ba73e83005f510, 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).

Datasheet PDF