component
lp28303aqvf
Public Unreviewedby Ray
LOWPOWER Battery Management, TDFN-10-EP(3x3). Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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README
markdownLP28303AQVF
LOWPOWER · Battery Management · TDFN-10-EP(3x3)
LP28303AQVF from LOWPOWER, in a TDFN-10-EP(3x3). 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 | AGND | power_in | Analog (signal) ground reference for internal control and reference circuitry. |
| 2 | PGND | power_in | Power ground return for the synchronous buck power stage. Also serves as the exposed thermal pad; connect to the ground plane for proper power dissipation. |
| 3 | VIN | power_in | Positive supply voltage input, 4.5V-5.5V (7V absolute max). Decouple with a 10 µF or larger surface-mount ceramic capacitor close to the pin. UVLO rising 4.1V / falling 3.9V; OVP rising 6.0V / falling 5.7V. |
| 4 | CHRG | output | Open-drain charge-status output. Pulled low by an internal N-channel MOSFET while the battery is charging; high-impedance otherwise. VOL ≤ 0.5V at ICHRG = 5 mA. Typically drives a status LED with a series resistor to VIN. |
| 5 | FULL | output | Open-drain charge-complete status output. Pulled low by an internal N-channel MOSFET when charging is complete; high-impedance otherwise. VOL ≤ 0.5V at IFULL = 5 mA. |
| 6 | NTC | input | Negative-temperature-coefficient thermistor sense input for battery-pack temperature qualification. Charging halts when VNTC is outside VNTC1 (45% VIN) to VNTC2 (80% VIN). Tie to GND (< 100 mV) to disable temperature sensing; pulling to VIN puts the part into shutdown and resets the internal timer. |
| 7 | BAT | power_out | Battery pin. Connects to the positive terminal of the Li-Ion cell (via the sense resistor RCS between CS and BAT). Regulated float voltage 4.2V ±1%; automatic recharge threshold ≈4.05V (VFLOAT − 150 mV). |
| 8 | CS | input | Current-sense input. Charge current is set by an external resistor RCS between CS and BAT with an internal 50 mV reference: IBAT = 50 mV / RCS (e.g. RCS = 25 mΩ → 2A, RCS = 20 mΩ → 2.5A). C/10 termination at ITERM ≈ 100 mA with RCS = 50 mΩ. |
| 9 | SW | output | Switch node of the internal synchronous buck converter. Connect to the external inductor (typ. 4.7 µH) feeding the sense resistor and battery. Operates at 600 kHz with switch rise/fall times < 5 ns; keep track short to minimise EMI. |
| 10 | SW | output | Switch node of the internal synchronous buck converter (paralleled with pin 9). Connect to the external inductor. See pin 9 for full description. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LOWPOWER |
| Package | TDFN-10-EP(3x3) |
| Category | PMIC |
| Pins | 10 |
Ordering variants
LP28303AQVFLP28303AQVFSPF
CAD (KiCad official)
- Symbol:
LP28303AQVF - Footprint:
Package_DFN_QFN:DFN-10-1EP_3x3mm_P0.5mm_EP1.55x2.48mm - 3D model: TDFN-10-EP(3x3) (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LOWPOWER datasheet (None pp, sha256
f160b4d8c7d33918, 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).
Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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