XT3406AFMR-G from NATLINEAR, in a SOT-23-5L. 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	CE	input	Chip enable input. Drive high (VCEH >= 1.2V) to enable the regulator; drive low (VCEL <= 0.9V) to place the device in shutdown (typical standby current 0uA, max 1uA at VIN=5V). Absolute max -0.3V to VIN+0.3V.
2	GND	power_in	Ground return for the device and power stage.
3	LX	output	Switching node - output of the internal power MOSFET stage. Connect to the external inductor (typ. 2.2uH). Absolute max current +/-1500mA; abs max voltage -0.3V to VIN+0.3V. Peak current limit typ. 1.2A.
4	VIN	power_in	Power supply input, 1.8V to 5.5V operating range (absolute max 6.5V). Bypass with a 4.7uF ceramic capacitor close to the pin.
5	FB	input	Output voltage feedback input. Connect to the resistor divider from VOUT; internal reference is 0.6V typ. (0.59-0.61V). Input bias current +/-50nA max.

Key specifications

Parameter	Value
Manufacturer	NATLINEAR
Package	SOT-23-5L
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

XT3406AFMR-G
XT3406AFMR-GAFML

CAD (KiCad official)

Symbol: XT3406AFMR-G
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5L (KiCad packages3D, STEP)

Provenance

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

Datasheet: NATLINEAR datasheet (7 pp, sha256 84eba0563afcd9fe, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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