ME4057ASPG-N from MICRONE, in a ESOP-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	TEMP	input	Battery temperature sense input. Connect to an external NTC thermistor divider to monitor battery temperature; charging is suspended when V(TEMP) is below 45%VCC or above 80%VCC (over/under temperature). Tie directly to GND if temperature monitoring is not used.
2	PROG	passive	Constant-current program and charge-current monitor pin. An external resistor R_PROG from PROG to GND sets the fast-charge current per I_BAT = (V_PROG / R_PROG) * 1100, with V_PROG ≈ 1.0V. Typical values: R_PROG = 1.1kΩ → 1000mA, 2.2kΩ → 500mA.
3	GND	power_in	Device ground reference. The exposed thermal PAD on the ESOP-8 package should also be soldered to the GND plane to improve thermal dissipation for the internal pass MOSFET.
4	VCC	power_in	Chip input supply pin, typically from a USB port or AC adapter. Operating range 4.0V to 9.0V (absolute max 10V); when VCC drops to within ~80mV of V(BAT) the chip shuts down and enters sleep mode (leakage < 2µA).
5	BAT	power_out	Battery connection / charge current output. Regulated float voltage is 4.2V (ME4057ASPG-N) with ±1% accuracy; supplies up to 1A programmed charge current to a single Li-ion/Li-polymer cell.
6	STDBY	output	Open-drain charge-complete (standby) status indicator, active low. Internal N-channel pulls STDBY low when charging has terminated (charge current below C/10); high-impedance otherwise.
7	CHRG	output	Open-drain charge status indicator, active low. Internal N-channel pulls CHRG low while a charge cycle is in progress; high-impedance in all other states.
8	CE	input	Chip enable input. Drive high to enable normal charger operation, drive low to shut the chip down. Compatible with TTL or CMOS logic levels; absolute max 10V.

Key specifications

Parameter	Value
Manufacturer	MICRONE
Package	ESOP-8
Category	PMIC
Pins	8

Ordering variants

Same part, different packaging or reel option.

ME4057ASPG-N
ME4057ASPG-NDSPG-N

CAD (KiCad official)

Symbol: ME4057ASPG-N
Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm
3D model: ESOP-8 (KiCad packages3D, STEP)

Provenance

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

Datasheet: MICRONE datasheet (17 pp, sha256 3b33536d2bdfda15, 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