L6920DBTR from STMicroelectronics, in a MSOP-8. 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	FB	input	Output voltage selector / feedback. Tie FB to GND for Vout = 5 V fixed, tie FB to OUT for Vout = 3.3 V fixed, or connect FB to an external resistor divider from OUT for adjustable output (1.8 V to 5.2 V). FB reference is 1.23 V.
2	LBI	input	Low-battery detector input. Compared against the internal 1.23 V threshold; drive from a resistor divider off the battery to set the desired low-battery trip point.
3	LBO	output	Low-battery detector output (active-low, open-drain). Goes low when the LBI voltage falls below the internal ~1.23 V threshold. Requires an external pull-up resistor (about 200 kΩ) for correct operation.
4	REF	output	1.23 V internal reference voltage output. Bypass to GND with a 100 nF capacitor to filter high-frequency noise; no capacitor is strictly required for stability.
5	SHDN	input	Active-low shutdown control. Device is in shutdown when SHDN < 0.2 V and operating when SHDN > 0.6 V. Shutdown current is ≤ 1 µA.
6	GND	power_in	Device ground reference.
7	LX	passive	Step-up inductor / switch node. Connects to the external boost inductor between VBATT and LX; carries the internal synchronous rectifier switch nodes. Peak switch current limit typically 0.8 A.
8	OUT	power_out	Regulated boost converter power output. Delivers 3.3 V or 5 V fixed (per FB strap) or 1.8-5.2 V adjustable; bypass with a low-ESR output capacitor (e.g. 47 µF).

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	MSOP-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

L6920DBTR

CAD (KiCad official)

Symbol: L6920DBTR
Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
3D model: MSOP-8 (KiCad packages3D, STEP)

Provenance

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

Datasheet: STMicroelectronics datasheet (16 pp, sha256 ff4d5f1b31c1b070, 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