component
TPSY8121C1ABC
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
markdownTPSY8121C1ABC
TECH PUBLIC · DC-DC Converters · SOT-23-6
TPSY8121C1ABC 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. Supply for the high-side gate driver. Decouple this pin to LX with a 0.1 µF ceramic capacitor. Absolute max BS-LX voltage: 4 V. |
| 2 | GND | power_in | Device ground return. Connect to a solid ground plane; keep the CIN loop area to IN/GND minimized. |
| 3 | FB | input | Output feedback pin. Connect to the center tap of the output resistor divider R1/R2 to program Vout = 0.6 V × (1 + R1/R2). Internal reference is 0.6 V ±2%; FB absolute max 4 V. |
| 4 | EN | input | Enable control. Pull high (VIH ≥ 2 V) to turn the regulator on; low (VIL ≤ 0.5 V) to shut down. Do not float. Absolute max EN voltage: VIN + 0.3 V. |
| 5 | IN | power_in | Power input, 4.5 V to 20 V (abs max 20 V). Decouple to GND with at least a 1 µF (typ. 4.7 µF X5R) low-ESR ceramic capacitor placed close to the IN and GND pins. |
| 6 | LX | output | Switching node. Connect to the output inductor. Internally driven by the top/bottom power FETs (90/70 mΩ RDS(ON)); absolute max LX voltage -0.3 V to VIN + 0.3 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TECH PUBLIC |
| Package | SOT-23-6 |
| Category | PMIC |
| Pins | 6 |
CAD (KiCad official)
- Symbol:
TPSY8121C1ABC - 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
99c89201d54a5f7d, 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).