# NDP1340KC

**NDP** · DC-DC Converters · SOP-8

NDP1340KC from NDP, 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 | FB | input | Feedback input for the output voltage, with the internal reference at 1.0 V (0.985 to 1.015 V) and an FB bias current of 0.2 µA. |
| 2 | CSP | input | Positive pole of the current sense input; the CSP-CSN sense voltage is 57 to 63 mV (60 mV typ), and CSP to GND is rated -0.3 to 25 V. |
| 3 | CSN | input | Negative pole of the current sense input; used with CSP for the current sense amplifier, and CSN to GND is rated -0.3 to 25 V. |
| 4 | VIN | power_in | Power input for the converter, rated for an input voltage range of 7 V to 30 V, with VIN to GND absolute maximum of -0.3 to 33 V and overvoltage protection at 32 V. |
| 5 | SW | output | Switching node connected to the inductor; SW to GND is rated -0.3 V to VIN+0.3 V. Pin 5 and pin 6 are both listed as SW in the datasheet. |
| 6 | SW | output | Switching node connected to the inductor; SW to GND is rated -0.3 V to VIN+0.3 V. Pin 5 and pin 6 are both listed as SW in the datasheet. |
| 7 | FS | input | Frequency setting pin: a resistor to GND sets the switching frequency (130 kHz floating up to 300 kHz with 470 kΩ), and FS below 0.3 V shuts the device down; FS to GND is rated -0.3 to 6 V. |
| 8 | GND | power_in | Ground reference pin for the device. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `NDP1340KC`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ndp1340kc-etched.step` / `ndp1340kc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ndp1340kc.step` / `ndp1340kc.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [NDP datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590904424447488000) (10 pp, sha256 `85d58b325357a0b4`, retrieved 2026-10-09, 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/ndp1340kc-datasheet.pdf)