RT4526GJ6 from Richtek Tech, in a TSOT-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	LX	power_out	Switching node. Drain of the internal N-MOSFET; connects to the boost inductor and the anode of the external Schottky diode. Rated -0.3V to 50V absolute max; RDS(on) ~0.7Ω typ.
2	GND	power_in	Device ground return for the internal MOSFET source and analog/control circuitry.
3	FB	input	Feedback pin. LED current sense input; place resistor R_SET from FB to GND to program LED current (VREF = 300mV typ, 285-315mV). Also accepts PWM dimming signal.
4	EN	input	Chip enable, active high. VIH ≥ 1.4V enables the converter, VIL ≤ 0.5V shuts it down (I_SHDN ~1µA). Absolute max -0.3V to 6V.
5	VOUT	power_in	Boost output voltage sense pin used for over-voltage protection (OVP threshold 30V min). Connect to the boosted rail after the Schottky diode / output capacitor. Absolute max -0.3V to 46V.
6	VIN	power_in	Input supply, 2.5V to 5.5V operating range (absolute max -0.3V to 6V). Bypass with 2.2µF ceramic capacitor to GND. UVLO ≈ 2.2V typ.

Key specifications

Parameter	Value
Manufacturer	Richtek Tech
Package	TSOT-23-6
Category	LED-drv
Pins	6

Ordering variants

Same part, different packaging or reel option.

RT4526GJ6

CAD (KiCad official)

Symbol: RT4526GJ6
Footprint: Package_TO_SOT_SMD:SOT-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 (13 pp, sha256 7aa1effcdf7f9bb3, retrieved 2026-08-17, tier: manufacturer)
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