component
TPSY8121BABC
Public Unreviewedby Ray
TECH PUBLIC DC-DC Converters, SOT-23-6. 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
markdownTPSY8121BABC
TECH PUBLIC · DC-DC Converters · SOT-23-6
TPSY8121BABC from TECH PUBLIC, in a SOT-23-6. 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 | BS | passive | Boot-strap pin. Supplies the high-side gate driver. Decouple this pin to LX with a 100nF (0.1uF) ceramic capacitor. |
| 2 | GND | power_in | Ground pin. Device return; tie to the system ground plane with a short, low-impedance connection. |
| 3 | FB | input | Output feedback pin. Connect to the center tap of the output resistor divider to program Vout = 0.6 V × (1 + R1/R2). Internal reference is 0.6V (±2%). |
| 4 | EN | input | Enable control input. Pull high (VIH ≥ 2V) to turn the regulator on, pull low (≤ 0.5V) to shut down. Do not float. |
| 5 | IN | power_in | Input supply pin (4.5V to 20V). Decouple to GND with at least a 1uF (typ. 4.7uF X5R) ceramic capacitor placed as close to the IN and GND pins as possible. |
| 6 | LX | power_out | Switching node / inductor pin. Connects to the source of the internal high-side FET and drain of the low-side FET; connect to the switching node of the output inductor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-23-6 |
| Category | PMIC |
| Pins | 6 |
Ordering variants
Same part, different packaging or reel option.
TPSY8121BABC
CAD (KiCad official)
- Symbol:
TPSY8121BABC - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TECH PUBLIC datasheet (7 pp, sha256
53b5795b53ca7410, 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).