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RT8110BGJ8

Public Made by Adom

by adom

Richtek Tech DC-DC Converters, TSOT-23-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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RT8110BGJ8

Richtek Tech · DC-DC Converters · TSOT-23-8

RT8110BGJ8 from Richtek Tech, in a TSOT-23-8. 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 VCC power_out Internal regulator output, typically 5.5V, that serves as the main bias supply and low-side gate driver supply and must be decoupled with a ceramic capacitor; it is monitored for power-on reset.
2 LGATE output Gate drive output for the low-side MOSFET.
3 GND power_in Signal and power ground of the IC; all voltage levels are referenced to this pin.
4 UGATE output Gate drive output for the high-side MOSFET.
5 BOOT power_in Supplies the high-side MOSFET gate driver through a bootstrap circuit; absolute maximum rating is 34V.
6 PHASE passive Switching node of the buck converter, also used to sense the low-side MOSFET voltage drop for overcurrent protection; absolute maximum range is -3V to 29V.
7 VIN power_in Connected to the integrated BJT collector that regulates VIN to 5.5V for VCC; designed to withstand 28V with a recommended input range of 10V to 28V.
8 FB input Inverting input of the error amplifier, connected to the output voltage divider; falling below the 0.5V typical threshold trips under voltage protection.

Key specifications

Parameter Value
Manufacturer Richtek Tech
Package TSOT-23-8
Category Power Management (PMIC)
Pins 8

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Power Supply Current IVIN 3 6 mA UGATE, LGATE open 4
Input Voltage Range VIN 10 28 V 4
Reference Voltage VREF 0.784 0.8 0.816 V 4
Free Running Frequency fSW 320 400 480 kHz 4
Open Loop DC Gain AO 60 90 dB Note 5 4
UGATE Drive Source Resistance RUGATEsr 3 4.5 Ω VBOOT − PHASE = 5V; VBOOT − VUGATE = 1V 5
UGATE Drive Sink Resistance RUGATEsk 2 3 Ω VUGATE − PHASE = 1V; VBOOT − PHASE = 5V 5
LGATE Drive Source Resistance RLGATEsr 4 6 Ω VCC − VLGATE = 1V 5
LGATE Drive Sink Resistance RLGATEsk 2 4 Ω VLGATE = 1V 5
UVP Threshold 0.5 0.6 V FB Voltage Falling 5
Soft-Start Interval TSS 1 3 6 ms 5
Supply Voltage VIN 10 28 V 4
Junction Temperature Range -40 125 °C 4
Ambient Temperature Range -40 85 °C 4
Supply Voltage VCC 7 V 4
Supply Voltage VIN 33 V 4
PHASE -3 29 V 4
BOOT 34 V 4
Input/Output Voltage 7 V 4
Junction Temperature 150 °C 4
Lead Temperature 260 °C Soldering, 10 sec. 4
Storage Temperature Range -65 150 °C 4
ESD Susceptibility HBM 2 kV Human Body Mode 4
ESD Susceptibility MM 200 V Machine Mode 4
Power Dissipation PD 0.382 W TA = 25°C, TSO-23-8 4
Package Thermal Resistance θJA 262 °C/W TSO-23-8; natural convection, TA = 25°C, JEDEC 51-3 (Note 2) 4

CAD (KiCad official)

  • Symbol: RT8110BGJ8
  • Footprint: Package_TO_SOT_SMD:TSOT-23-8
  • 3D model: TSOT-23-8 (KiCad packages3D, STEP)
  • 3D model files: rt8110bgj8-etched.step / rt8110bgj8-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); rt8110bgj8.step / rt8110bgj8.glb are the bare package body.

Provenance

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

  • Datasheet: Richtek Tech datasheet (13 pp, sha256 a7b40ad0ae942f8f, retrieved 2026-10-18, 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