component

BL78L05D

Public Made by Adom

by adom

BL Shanghai Belling Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
Name Last commit message Last updated
docs bl78l05d: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray 2mo ago
bl78l05d-etched.fit.json bl78l05d: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
bl78l05d-etched.glb bl78l05d: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
bl78l05d-etched.step bl78l05d: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
bl78l05d.glb Publish 0.1.0 · Ray 2mo ago
bl78l05d.kicad_mod Publish 0.1.0 · Ray 2mo ago
bl78l05d.kicad_sym symbol: the part is a 3-lead SOT-89 - the shipped footprint has 3 pads and LCSC stocks this MPN in SOT-89-3 - but the s… · Ray 2mo ago
bl78l05d.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray 2mo ago
bl78l05d.step Publish 0.1.0 · Ray 2mo ago
package.json Publish 0.2.0 · Ray 2mo ago
pads.json symbol: the part is a 3-lead SOT-89 - the shipped footprint has 3 pads and LCSC stocks this MPN in SOT-89-3 - but the s… · Ray 2mo ago
page.json bl78l05d: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
README.md bl78l05d: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray 1mo ago

BL78L05D

BL Shanghai Belling · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3

BL78L05D from BL Shanghai Belling, in a SOT-89-3. 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 OUT power_out Regulated +5V output. Typical 5.0V (min 4.8V, max 5.2V) at Io = 1mA-70mA over 7V ≤ Vi ≤ Vmax. Maximum continuous output current 100mA. Requires ≥0.1µF ceramic bypass to GND close to the pin for stability.
2 GND power_in Ground/common reference for the regulator. Tie to system ground plane; internally connected to pins 3, 6, and 7 in the SOP8 package.
3 GND power_in Ground/common reference (internally tied to pins 2, 6, 7). Additional GND pins improve thermal dissipation via the PCB.
4 NC unconnected No internal connection. Leave floating or tie to GND; do not use as a signal node.
5 NC unconnected No internal connection. Leave floating or tie to GND; do not use as a signal node.
6 GND power_in Ground/common reference (internally tied to pins 2, 3, 7). Additional GND pins improve thermal dissipation via the PCB.
7 GND power_in Ground/common reference (internally tied to pins 2, 3, 6). Additional GND pins improve thermal dissipation via the PCB.
8 IN power_in Unregulated DC input. Absolute maximum 35V; recommended operating range approximately 7V to 20V (must be at least Vout + ~1.7V dropout). Requires ≥0.33µF bypass capacitor close to the pin for input stability.

Key specifications

Parameter Value
Manufacturer BL Shanghai Belling
Package SOT-89-3
Category PMIC
Pins 8

Ordering variants

  • BL78L05DD

CAD (KiCad official)

  • Symbol: BL78L05D
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)
  • 3D model files: bl78l05d-etched.step / bl78l05d-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bl78l05d.step / bl78l05d.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
bl78l05d.step 57 KB You want the bare part, or you mark your own boards.
bl78l05d-etched.step 1.2 MB You want the part with BL78L05D already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 320 faces against 42 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 (3 pp, sha256 158a1318d4cdbd85, 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