# TL3842BDR-8

**Texas Instruments** · AC-DC Controllers And Regulators · SOIC-8

TL3842BDR-8 from Texas Instruments, in a SOIC-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 | COMP | bidirectional | Error amplifier compensation pin; the error amplifier output sink current is limited to 10 mA maximum. |
| 2 | VFB | input | Error amplifier input; the recommended input voltage range is 0 to 5.5 V (absolute maximum -0.3 V to 6.3 V). |
| 3 | ISENSE | input | Current sense comparator input; the recommended input voltage range is 0 to 5.5 V (absolute maximum -0.3 V to 6.3 V). |
| 4 | RT/CT | bidirectional | Oscillator RC input; the recommended input voltage range is 0 to 5.5 V, supporting an oscillator frequency of 100 kHz to 500 kHz. |
| 5 | GND | power_in | Device power supply ground terminal to which all device voltages are referenced. |
| 6 | OUTPUT | output | PWM output; the recommended output voltage range is 0 to 30 V, with an average output current of 200 mA maximum and an absolute maximum output current of ±1 A. |
| 7 | VCC | power_in | Device positive supply voltage; the recommended supply voltage is up to 30 V, with supply current externally limited to 25 mA. |
| 8 | VREF | power_in | Oscillator voltage reference output; the recommended reference output current is -20 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `TL3842BDR-8`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `tl3842bdr-8-etched.step` / `tl3842bdr-8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tl3842bdr-8.step` / `tl3842bdr-8.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/tl3844b) (32 pp, sha256 `a69cfad5c4f4ed99`, retrieved 2026-10-10, 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:** 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/tl3842bdr-8-datasheet.pdf)