component

RT9818B-18GV

Public Made by Adom

by adom

Richtek Tech Supervisor And Reset ICs, SOT-23-3L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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RT9818B-18GV

Richtek Tech · Supervisor And Reset ICs · SOT-23-3L

RT9818B-18GV from Richtek Tech, in a SOT-23-3L. 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 GND power_in Ground pin for the voltage detector.
2 RESET/ output Active-low open-drain reset output; the datasheet's typical application uses a 100kΩ pull-up, for which VOL is less than 0.2V.
3 VDD power_in Monitored supply pin; the operating VDD range is 0.9V to 6V and the reset is asserted when VDD falls below the threshold.

Key specifications

Parameter Value
Manufacturer Richtek Tech
Package SOT-23-3L
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
Operating VDD (VOUT) Range VDD 0.9 6 V 3
Supply Current IDD 3 8 μA VTH = 3V, VDD = 4.5V, TA = 27C 3
Threshold Voltage Accuracy VTH -1.5 1.5 % TA = 27C 3
VDD Drop to Reset Delay tRD 20 μs Drop = VTH 125mV 3
Reset Active Time Out Period (RT9818B/F) tRP 35 55 75 ms VDD 1.02 x VTH 3
RESET Output Voltage Low VOL 0.4 V VDD < VTH, ISINK > 3.5mA (Note 5) 3
Junction Temperature Range -40 125 °C 3
Ambient Temperature Range -40 85 °C 3
Terminal Voltage (with Respect to GND) VDD VDD -0.3 6 V 3
All Other Inputs -0.3 6 V 3
Input Current IVDD 20 mA 3
Power Dissipation SOT-23-3 PD 0.4 W TA = 25°C 3
Lead Temperature (Soldering, 10 sec) 260 °C 10 sec 3
Storage Temperature Range -65 150 °C 3
ESD Susceptibility HBM 2 kV HBM (Human Body Model) 3
Package Thermal Resistance SOT-23-3 θJA 250 °C/W TA = 25°C, JEDEC 51-3 (Note 2) 3

CAD (KiCad official)

  • Symbol: RT9818B-18GV
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3L (KiCad packages3D, STEP)
  • 3D model files: rt9818b-18gv-etched.step / rt9818b-18gv-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); rt9818b-18gv.step / rt9818b-18gv.glb are the bare package body.

Provenance

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

  • Datasheet: Richtek Tech datasheet (14 pp, sha256 f01cb2fba9eeeacd, retrieved 2026-10-17, 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