component

R5478N218CD-TR-FF

Public Unreviewed

by Ray

Ricoh Elec Devices Battery Management, SOT-23-6. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmicr5478n218cd-tr-ff
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

PCB Footprint

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Datasheet

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Download PDF
Contents

README

markdown

R5478N218CD-TR-FF

Ricoh Elec Devices · Battery Management · SOT-23-6

R5478N218CD-TR-FF from Ricoh Elec Devices, in a SOT-23-6. 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 DOUT output CMOS output driving the gate of the external discharge-control N-channel MOSFET. Goes to 'L' after the internal fixed delay when over-discharge or excess discharge-current is detected. VOH ≈ 3.4-3.7 V (VDD=3.9 V, Ioh=-50 µA); VOL ≈ 0.2-0.5 V (VDD=2.0 V, Iol=50 µA).
2 V- input Charger negative input / current-sense pin. Used to sense excess discharge-current and short-circuit conditions (VDET3 threshold, 0.05-0.20 V; Vshort typ. 0.75 V). Absolute rating VDD−30 V to VDD+0.3 V.
3 COUT output CMOS output driving the gate of the external charge-control N-channel MOSFET. Goes to 'L' after the internal fixed delay (typ. 1 s) when over-charge is detected. Level shifted so 'L' equals V- pin voltage and 'H' equals VDD.
4 NC unconnected No Connection. Leave floating or tie as convenient on the PCB.
5 VDD power_in Positive supply pin and substrate voltage reference. Also the sensed cell-voltage node used by the over-charge (VDET1) and over-discharge (VDET2) comparators. Operating range 1.5-5.0 V; absolute max −0.3 to 12 V.
6 VSS power_in Ground / negative supply pin for the IC (cell negative terminal).

Key specifications

Parameter Value
Manufacturer Ricoh Elec Devices
Package SOT-23-6
Category PMIC
Pins 6

Ordering variants

Same part, different packaging or reel option.

  • R5478N218CD-TR-FF
  • R5475N

CAD (KiCad official)

  • Symbol: R5478N218CD-TR-FF
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Ricoh Elec Devices datasheet (27 pp, sha256 e02e7c3c39eec61e, 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