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SSP7903P50JR

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by Ray

Shanghai Siproin Microelectronics Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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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

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SSP7903P50JR

Shanghai Siproin Microelectronics · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252

SSP7903P50JR from Shanghai Siproin Microelectronics, 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 VIN power_in Unregulated input supply. Absolute maximum 40V, minimum operating 2.2V; recommend VIN >= VOUT + 2V for regulation. Bypass to GND with a 10µF (or 2.2-4.7µF ceramic) capacitor close to the pin.
2 GND power_in Device ground reference. Tie to system single-point ground; the TO-252 tab is thermally/electrically tied to this pin and should be soldered to a copper area to improve power dissipation (PD ≈ 1800mW for TO-252).
3 VOUT power_out Regulated 5.0V ±2% output (P50 option). Delivers up to 1A with ~1000mV dropout at 1A (4mV at 1mA), current-limited to ~1.8A with fold-back and short-circuit protection (~120mA short-circuit current). Bypass to GND with a 10µF (or 2.2-4.7µF ceramic) capacitor for stability.

Key specifications

Parameter Value
Manufacturer Shanghai Siproin Microelectronics
Package TO-252
Category PMIC
Pins 3

Ordering variants

Same part, different packaging or reel option.

  • SSP7903P50JRJx
  • SSP7903P50JR
  • SSP7903P50JRJG
  • SSP7903P50JRPx
  • SSP7903P50JRPR
  • SSP7903P50JRPG
  • SSP7903P50JRPBx
  • SSP7903P50JRPBR
  • SSP7903P50JRPBG
  • SSP7903P50JRFx
  • SSP7903P50JRFR
  • SSP7903P50JRFG
  • SSP7903P50JRFBx
  • SSP7903P50JRFBR
  • SSP7903P50JRFBG

CAD (KiCad official)

  • Symbol: SSP7903P50JR
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ssp7903p50jr.step 119 KB You want the bare part, or you mark your own boards.
ssp7903p50jr-etched.step 2.5 MB You want the part with SSP7903P50JR already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 616 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: Shanghai Siproin Microelectronics datasheet (11 pp, sha256 d1763cb71baebbea, 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