# TD1432PR

**Techcode Semicon** · DC-DC Converters · SOP-8

TD1432PR from Techcode Semicon, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | power_in | Power input that supplies the IC and the step-down converter switches; drive with a 9V to 40V source and bypass to GND with a suitably large capacitor. |
| 2 | SW | power_out | Power switching output that is the switch node supplying the output; connect the output LC filter from SW to the load. |
| 3 | FB | input | Feedback input that senses the output voltage through a resistive divider, with a feedback threshold of 1.23V. |
| 4 | ON/OFF | input | Digital enable input where driving it low turns the regulator on and driving it high turns it off; do not leave it floating when Vin is above 32V. |
| 5 | GND | power_in | Ground pin for the device; pins 5 to 8 are all ground and should be connected to a maximized copper area for heat dissipation. |
| 6 | GND | power_in | Ground pin for the device; pins 5 to 8 are all ground and should be connected to a maximized copper area for heat dissipation. |
| 7 | GND | power_in | Ground pin for the device; pins 5 to 8 are all ground and should be connected to a maximized copper area for heat dissipation. |
| 8 | GND | power_in | Ground pin for the device; pins 5 to 8 are all ground and should be connected to a maximized copper area for heat dissipation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Techcode Semicon |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Feedback voltage (TD1432PR, adjustable variant) | VFB | 1.2 | 1.23 | 1.26 | V | 9V≤VIN≤40V | 4 |
| Shutdown Supply Current |  |  |  | 10 | uA | ON/OFF=5V | 4 |
| Quiescent current | IQ |  | 3 | 4.5 | mA | ON/OFF=0V; VFB=1.5V | 4 |
| Oscillation Frequency | FOSC1 | 120 | 150 | 180 | kHz | VFB>0.3 | 4 |
| Maximum Duty Cycle | DMAX |  |  | 98 | % |  | 4 |
| Input voltage (recommended operating) | VIN | 9 |  | 40 | V |  | 4 |
| Converter output current (recommended operating) | Iout | 0 |  | 2 | A |  | 4 |
| Operating junction temperature (recommended operating) | TJ | -40 |  | 125 | ℃ |  | 4 |
| Operating ambient temperature (recommended operating) | TA | -40 |  | 85 | ℃ |  | 4 |
| Input voltage (absolute maximum) | VIN | -0.3 |  | 42 | V |  | 3 |
| Feedback pin voltage (absolute maximum) | VFB | -0.3 |  | 5 | V |  | 3 |
| ON/OFF pin voltage (absolute maximum) | VEN | -0.3 |  | 5 | V |  | 3 |
| Output pin voltage (absolute maximum) | VSW | -0.3 |  |  | V | Printed maximum is VIN+0.3 V (not a numeric limit) | 3 |
| Operating junction temperature (absolute maximum) | TJ |  |  | 150 | ℃ |  | 3 |
| Storage temperature | TSTG | -65 |  | 150 | ℃ |  | 3 |
| Lead temperature | TLEAD |  |  | 260 | ℃ |  | 3 |
| ESD (HBM) |  |  |  | 2000 | V | HBM | 3 |
| Thermal resistance, junction to ambient | RθJA |  | 85 |  | ℃/W |  | 3 |
| Thermal resistance, junction to case | RθJC |  | 45 |  | ℃/W |  | 3 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | 4. Pour a maximized copper area to the GNDs pin and the | 7 |

## CAD (KiCad official)

- Symbol: `TD1432PR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `td1432pr-etched.step` / `td1432pr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `td1432pr.step` / `td1432pr.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Techcode Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590230658590412800) (9 pp, sha256 `3c2969ead79b35d7`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/td1432pr-datasheet.pdf)