# MP1484

**JSMSEMI** · DC-DC Converters · ESOP-8

MP1484 from JSMSEMI, in a ESOP-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 | BS | passive | Bootstrap pin; a capacitor connected between SW and BS is required to form a floating supply across the high-side switch driver. |
| 2 | IN | power_in | Power supply pin; recommended input voltage 4.5V to 18V (absolute maximum 20V). |
| 3 | SW | power_out | Switching pin connecting to the inductor; absolute maximum -0.3V to VIN+1V. |
| 4 | GND | power_in | Ground pin. |
| 5 | FB | input | Adjustable version feedback input; connect FB to the center point of the external resistor divider (absolute maximum 6V). |
| 6 | NC | unconnected | No connection (no function listed in the datasheet table). |
| 7 | EN | input | Drive to a logic-high to enable the IC; drive to a logic-low to disable the IC and enter micro-power shutdown mode (absolute maximum 20V). |
| 8 | NC | unconnected | No connection. |
| 9 | EPAD | power_in | Exposed pad, ground pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | JSMSEMI |
| Package | ESOP-8 |
| Category | Power Management (PMIC) |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `MP1484`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`
- 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files: `mp1484-etched.step` / `mp1484-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mp1484.step` / `mp1484.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [JSMSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589839353699999744) (13 pp, sha256 `3b55cc49ef7edc83`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (vision), consensus `claude-opus-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/mp1484-datasheet.pdf)