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Contents

README

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RT6273BHGJ6F

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

RT6273BHGJ6F from Richtek Tech, in a TSOT-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 GND power_in Power ground.
2 SW output Switch node between the internal switch and the synchronous rectifier; connect this pin to the inductor and bootstrap capacitor.
3 VIN power_in Power input with an input voltage range of 4.5V to 17V; connect input bypass capacitors directly to this pin and the GND pins, using MLCC capacitance higher than 20µF as recommended.
4 FB input Feedback voltage input connected to the midpoint of the external resistive divider; the device regulates FB to the feedback reference voltage, typically 0.765V.
5 EN input Enable control input; a logic high enables the device and connecting this pin to GND disables it.
6 BOOT passive Bootstrap capacitor connection node supplying the high-side gate driver; connect a 0.1µF ceramic capacitor between this pin and the SW pin.

Key specifications

Parameter Value
Manufacturer Richtek Tech
Package TSOT-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
Supply Input Operating Voltage VIN 4.5 17 V 9
Under-Voltage Lockout Threshold VUVLO 3.7 4 4.3 V 9
Shutdown Current ISHDN 4 µA VEN = 0V 9
Enable Voltage Threshold, EN high-level input voltage VEN_H 1.16 1.25 1.34 V EN high-level input voltage 9
Enable Voltage Threshold, EN low-level input voltage VEN_L 1.01 1.1 1.19 V EN low-level input voltage 9
EN Pin Pull-Down Resistance REN_DN 225 450 900 kΩ EN pin resistance to GND, VEN = 12V 9
Feedback Threshold Voltage VFB 758 765 772 mV VOUT = 1.05V 9
Feedback Input Current IFB -0.1 0 0.1 µA VFB = 0.8V, TA = 25°C 9
Low-Side Switch Valley Current Limit ILIM_L 3.2 4.2 5.2 A 9
Supply Input Voltage (absolute maximum) VIN -0.3 20 V 8
Enable Voltage (absolute maximum) EN -0.3 20 V 8
Switch Voltage (absolute maximum) SW -0.3 20.3 V 8
Switch Voltage transient SW -5 25 V < 100ns 8
BOOT Voltage (absolute maximum) BOOT -0.3 26 V 8
BOOT to SW Voltage (absolute maximum) VBOOT − VSW -0.3 6 V 8
Feedback Voltage (absolute maximum) FB -0.3 6 V 8
Lead Temperature 260 °C Soldering, 10 sec. 8
Junction Temperature 150 °C 8
Storage Temperature Range -65 150 °C 8
Power Dissipation PD 1.64 W TA = 25°C, TSOT-23-6 (FC) 8
Supply Input Voltage (recommended) VIN 4.5 17 V 8
Junction Temperature Range (recommended) TJ -40 125 °C 8
Junction-to-ambient thermal resistance θJA 88.7 °C/W JEDEC standard, TSOT-23-6 (FC) 8
Junction-to-case (top) thermal resistance θJC(Top) 76.9 °C/W TSOT-23-6 (FC) 8
Junction-to-case (bottom) thermal resistance θJC(Bottom) 6 °C/W TSOT-23-6 (FC) 8
Junction-to-ambient thermal resistance (specific EVB) θJA(EVB) 61 °C/W specific EVB, TSOT-23-6 (FC) 8
Junction-to-top characterization parameter ΨJC(Top) 13.9 °C/W TSOT-23-6 (FC) 8
Junction-to-board characterization parameter ΨJB 31.53 °C/W TSOT-23-6 (FC) 8

CAD (KiCad official)

  • Symbol: RT6273BHGJ6F
  • Footprint: Package_TO_SOT_SMD:TSOT-23-6
  • 3D model: TSOT-23-6 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Richtek Tech datasheet (32 pp, sha256 a57b2a243bb3f233, retrieved 2026-10-31, tier: manufacturer)
  • 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