component
LP28057ASPF
Public Unreviewedby Ray
LOWPOWER Battery Management, ESOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownLP28057ASPF
LOWPOWER · Battery Management · ESOP-8
LP28057ASPF from LOWPOWER, 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 | NC | unconnected | No connect. Leave floating; do not use for routing. |
| 2 | ISET | input | Charge current program and charge current monitor pin. A 1% resistor RISET from ISET to ground programs IBAT = 1000V/RISET (e.g., 1kΩ → 1A, 2kΩ → 500mA). In constant-current mode this pin servos to 1V and can be sensed to monitor charge current. |
| 3 | VSS | power_in | System ground return for the device. |
| 4 | VIN | power_in | Input power supply, 4.5V to 6.5V (typ. 5V, absolute max 10V). Connects to a wall adapter or USB supply. Decouple with a 10µF capacitor to VSS. |
| 5 | BAT | power_out | Battery connection. Drives the single-cell Li-ion battery through the internal P-channel MOSFET, regulated to 4.2V ±1% float voltage. Decouple with a 10µF capacitor to VSS. Shutdown/standby drain <1µA. |
| 6 | STAT2 | output | Open-drain charge status output. High-impedance (pulled high by external pull-up) while charging; pulled low by an internal N-channel MOSFET when the charge cycle completes. Complement of STAT1. |
| 7 | STAT1 | output | Open-drain charge status output. Pulled low by an internal N-channel MOSFET while the battery is charging; high-impedance (pulled high by external pull-up) once the charge cycle completes. |
| 8 | EN | input | Chip enable input. Charging is enabled when the pin is left floating or driven high (VIH ≥ 1.4V); pulling low (VIL ≤ 0.4V) disables charging and puts the part in shutdown. |
| 9 | GND | power_in | Exposed thermal pad on the bottom of the ESOP-8 package. Connect to the PCB ground plane to provide the primary thermal path for heat dissipation from the internal power MOSFET. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LOWPOWER |
| Package | ESOP-8 |
| Category | PMIC |
| Pins | 9 |
Ordering variants
Same part, different packaging or reel option.
LP28057ASPF
CAD (KiCad official)
- Symbol:
LP28057ASPF - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm - 3D model: ESOP-8 (KiCad packages3D, STEP)
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
lp28057aspf.step |
125 KB | You want the bare part, or you mark your own boards. |
lp28057aspf-etched.step |
2.3 MB | You want the part with LP28057ASPF already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 564 faces against 152 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LOWPOWER datasheet (7 pp, sha256
91ea4fa4b65dce8f, retrieved 2026-08-17, tier: lcsc) - 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).