component
SP4533
Public Unreviewedby Ray
TPOWER 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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README
markdownSP4533
TPOWER · Battery Management · ESOP-8
SP4533 from TPOWER, 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 | OUT | power_out | Boost output positive terminal and output-voltage sense node. Delivers 5V (typ, 4.8-5.2V) at up to 1A into the load; requires low-ESR output capacitor (e.g. 10uF x2) close to the pin. |
| 2 | BAT | bidirectional | Li-ion battery positive terminal. Charge current sinks into this pin (1A CC, 100mA trickle when VBAT<2.9V) up to VBAT=4.2V or 4.35V; during discharge it supplies the boost. Undervoltage lockout thresholds: 3.2V rising, 3.0V low-battery warning, 2.85V discharge cut-off. |
| 3 | SW | power_out | Drain of the internal boost NMOS; switch node for the external 2.2uH inductor tied between BAT and SW. Boost operates at ~1MHz (0.7-1.3MHz). Keep the SW trace short and wide; inductor saturation current must exceed 3A. |
| 4 | SWT | bidirectional | Combined pushbutton input and flashlight LED driver. Short-press: display battery level on LEDs; long-press 2s: toggle flashlight LED (max drive 50mA). External button to GND with a 10kΩ pull-up and optional series-resistor LED. |
| 5 | VDD | power_in | Charger power input (USB 5V). Recommended range 4.5-5.5V (abs: 4.3-5.5V per electrical table). Decouple with a 2.2uF cap; series 1.5Ω resistor shown in typical app for inrush limiting. |
| 6 | LED2 | output | Discharge-indicator LED driver (open-drain sink, ~2mA at VBAT=4V). Solid on during discharge; blinks at 1Hz as a low-battery warning when VBAT<3.0V. |
| 7 | VSEL | input | Charge-voltage select. Tie to GND for 4.2V termination; leave floating for 4.35V termination. Static, three-state-like logic input (GND vs. open). |
| 8 | LED1 | output | Charge-indicator LED driver (open-drain sink, ~2mA at VBAT=4V). Blinks at 1Hz during charging; solid on when battery is full. |
| 9 | GND | power_in | Exposed pad - system ground. Must be soldered to a large PCB ground plane for electrical return and thermal dissipation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TPOWER |
| Package | ESOP-8 |
| Category | PMIC |
| Pins | 9 |
CAD (KiCad official)
- Symbol:
SP4533 - 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 |
|---|---|---|
sp4533.step |
125 KB | You want the bare part, or you mark your own boards. |
sp4533-etched.step |
1.8 MB | You want the part with SP4533 already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 432 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: TPOWER datasheet (6 pp, sha256
4abd95de4abfb69f, 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).