component

RT6255BHGJ6F

Public Made by Adom

by adom

Richtek Tech DC-DC Converters, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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RT6255BHGJ6F

Richtek Tech · DC-DC Converters · SOT-23-6

RT6255BHGJ6F from Richtek Tech, in a SOT-23-6. 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 FB input Feedback voltage input that sets the output voltage through an external resistive divider, referenced to the 0.6V feedback threshold (0.594V to 0.606V).
2 EN input Enable control input: logic high enables the device and connecting it to GND disables it, with EN_H minimum 1.5V and EN_L maximum 0.4V.
3 GND power_in System ground that serves as the power return for the IC.
4 VIN power_in Power input that supplies the power switches, specified for a 4.5V to 18V supply with an absolute maximum of 20V.
5 LX output Switch node that supplies power to the output through the LC filter; it carries high-frequency voltage swing and should be kept to a small area, with absolute maximum rating of -0.3V to 20V (-5V to 27V for less than 20ns).
6 BOOT power_out Bootstrap supply for the high-side gate driver, connected through a 0.1µF low-ESR ceramic capacitor to LX, with BOOT-to-LX limited to -0.3V to 6V.

Key specifications

Parameter Value
Manufacturer Richtek Tech
Package SOT-23-6
Category Power Management (PMIC)
Pins 6

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
VIN Supply Input Operating Voltage VIN 4.5 18 V 8
VIN Under-Voltage Lockout Threshold-Rising VUVLO 3.9 4.1 4.3 V VIN rising 8
EN Input High Voltage VEN_H 1.5 V 9
EN Input Low Voltage VEN_L 0.4 V 9
Feedback Threshold Voltage VTH_FB 0.594 0.6 0.606 V 9
Feedback Current IFB 50 50 nA VFB = 4V 9
Low-Side Switch Valley Current Limit ILIM_L 5.25 7.25 9.25 A 9
Oscillator Frequency fSW 400 500 600 kHz 9
Supply Input Voltage VIN 4.5 18 V 8
Junction Temperature Range -40 125 °C 8
Ambient Temperature Range -40 85 °C 8
Supply Input Voltage (absolute maximum) VIN -0.3 20 V 8
Enable Pin Voltage EN -0.3 20 V 8
Switch Node Voltage LX -0.3 20 V 8
Switch Node Voltage (transient) LX -5 27 V <20ns 8
BOOT to LX Voltage VBOOT − VLX -0.3 6 V 8
Other Pins Voltage -0.3 6 V 8
Power Dissipation TSOT-23-6 (FC) PD 1.923 W TA = 25°C 8
Junction Temperature 150 °C 8
Lead Temperature (Soldering, 10 sec.) 260 °C 8
Storage Temperature Range -65 150 °C 8
ESD Susceptibility HBM 2 kV Human Body Model 8
Package Thermal Resistance TSOT-23-6 (FC) junction-to-ambient θJA 52 °C/W 8
Package Thermal Resistance TSOT-23-6 (FC) junction-to-case θJC 5 °C/W 8

CAD (KiCad official)

  • Symbol: RT6255BHGJ6F
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: rt6255bhgj6f-etched.step / rt6255bhgj6f-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); rt6255bhgj6f.step / rt6255bhgj6f.glb are the bare package body.

Provenance

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

  • Datasheet: Richtek Tech datasheet (21 pp, sha256 9851a77a1f4d8bce, 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