# UC3902N

**Texas Instruments** · Power Management - Specialized · PDIP-8

UC3902N from Texas Instruments, in a PDIP-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 | GND | power_in | Local power supply return and signal ground; all voltages in the datasheet are referenced to GND. |
| 2 | SENSE | input | Inverting input of the current sense amplifier, with an absolute maximum input voltage range of −5 V to 5 V. |
| 3 | ADJ | input | Current output of the adjust amplifier circuit (NPN collector), with an absolute maximum range of −0.3 V to 20 V and output current of −1 mA to 30 mA. |
| 4 | ADJR | output | Current adjust amplifier range set (NPN emitter), with an absolute maximum input voltage range of −0.3 V to 4 V. |
| 5 | COMP | bidirectional | Output of the error amplifier and input of the adjust amplifier, with an absolute maximum voltage range of −0.3 V to 4 V. |
| 6 | SHARE− | input | Reference for the SHARE+ pin, with the SHARE− and SHARE+ pins rated −0.3 V to 10 V absolute maximum. |
| 7 | SHARE+ | bidirectional | Positive input from the share bus or drive-to-share bus, rated −0.3 V to 10 V absolute maximum with output current of −100 mA to 10 mA. |
| 8 | VCC | power_in | Local power supply (positive), specified for 2.7 V to 20 V operation with an absolute maximum range of −0.3 V to 20 V. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `UC3902N`
- Footprint: `Package_DIP:DIP-8_W7.62mm`
- 3D model: PDIP-8 (KiCad packages3D, STEP)
- 3D model files: `uc3902n-etched.step` / `uc3902n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uc3902n.step` / `uc3902n.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/uc2902) (17 pp, sha256 `6652b47563ad672c`, retrieved 2026-10-11, 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/uc3902n-datasheet.pdf)