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Contents

Pinout
Key specifications
Electrical characteristics
CAD (KiCad official)
Provenance

README

markdown

FM5057

Shenzhen Fuman · Battery Management · SOT-89-5

FM5057 from Shenzhen Fuman, in a SOT-89-5. 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	VDD	power_in	Positive supply and cell-positive input of the IC; the absolute maximum VDD is -0.3 V to +10 V and the stated operating voltage range is 1.5 V to 10 V.
2	GND	power_in	Negative supply and cell-negative input of the IC, serving as the battery-side ground reference.
3	GND	power_in	Negative supply and cell-negative input of the IC, serving as the battery-side ground reference (pin 3 is internally tied with pin 2 per the datasheet's '2、3' grouping).
4	VM	input	Overcurrent and short-circuit detection pin connected to the load ground terminal; the allowed input voltage is VDD-6 V to VDD+0.3 V.
5	VM	input	Overcurrent and short-circuit detection pin connected to the load ground terminal; the allowed input voltage is VDD-6 V to VDD+0.3 V (pin 5 is grouped with pin 4 in the datasheet's '4、5' entry).

Key specifications

Parameter	Value
Manufacturer	Shenzhen Fuman
Package	SOT-89-5
Category	Power Management (PMIC)
Pins	5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Operating voltage	VDD	1.5		10	V		2
Operating current	IDD		3	6	uA	VDD=3.7V	2
Overcharge detection voltage	VOCP	4.245	4.275	4.305	V		2
Overcharge release voltage	VOCR	4.025	4.075	4.125	V		2
Overdischarge detection voltage	VODP	2.35	2.425	2.5	V		2
Overdischarge release voltage	VODR	2.775	2.825	2.875	V		2
Overcurrent discharge detection voltage	VOI	0.12	0.15	0.18	V		2
Overcurrent charge detection voltage	VCI	-0.12	-0.15	-0.18	V		2
Short-circuit current detection voltage	VSHORT	0.82	1.36	1.75	V	VDD=3.6V	2
Overcharge detection delay time	TOC	60	120	170	ms	VDD=3.6V~4.4V	2
Overdischarge detection delay time	TOD	30	60	95	ms	VDD=3.6V~2.0V	2
Overcurrent detection delay time	TOI	4	7	11	ms	VDD=3.6V	2
Short-circuit current detection delay time	TSHORT	200	400	600	us	VDD=3.6V	2
MOSFET on-resistance	RDS(on)		15.8	18	mΩ	VGS = 3.7V, ID = 1.0A	2
Supply voltage (absolute maximum)	VDD	-0.3		10	V		2
Operating temperature	TA	-40		85	℃		2
Storage temperature		-55		125	℃		2

CAD (KiCad official)

Symbol: FM5057
Footprint: Package_TO_SOT_SMD:SOT-89-5
3D model: SOT-89-5 (KiCad packages3D, STEP)
3D model files: fm5057-etched.step / fm5057-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); fm5057.step / fm5057.glb are the bare package body.

Provenance

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

Datasheet: Shenzhen Fuman datasheet (5 pp, sha256 7e07cc32fc535e79, retrieved 2026-10-18, 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: 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