HG4054M5 from HGSEMI, in a SOT-23-5. 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	CHRG	output	Open-drain charge status output. Pulled low by an internal N-channel MOSFET during charging; released (high-Z) at end-of-charge or when the part detects an undervoltage lockout condition. Absolute max voltage 10 V.
2	GND	power_in	Device ground return.
3	BAT	power_out	Charge current output to the Li-Ion cell. Regulates the final float voltage to 4.2 V via an internal precision resistor divider (divider disconnected in shutdown). Absolute max 7 V; supports continuous BAT short-circuit.
4	VCC	power_in	Positive input supply, 4.25 V-6.5 V, bypass with at least 1 µF to GND. When VCC drops within 30 mV of BAT the part enters shutdown and IBAT falls below 2 µA.
5	PROG	bidirectional	Charge-current program, monitor and shutdown pin. A 1% resistor RPROG to GND sets ICHG = 1000/RPROG (A). In constant-current mode the pin sits at 1 V and can be used to measure charge current (IBAT = VPROG/RPROG × 1000). Floating the pin lets an internal ~2.5 µA pull-up raise it past the 1.22 V shutdown threshold, driving the charger into shutdown (ICC ≈ 45 µA).

Key specifications

Parameter	Value
Manufacturer	HGSEMI
Package	SOT-23-5
Category	PMIC
Pins	5

Ordering variants

Same part, different packaging or reel option.

HG4054M5/TR

CAD (KiCad official)

Symbol: HG4054M5
Footprint: Package_TO_SOT_SMD:SOT-23-5
3D model: SOT-23-5 (KiCad packages3D, STEP)

Provenance

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

Datasheet: HGSEMI datasheet (10 pp, sha256 2ff1d755ad59a0ed, 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