# LM2770SD-1215

**Texas Instruments** · DC-DC Converters · WSON-10-EP(3x3)

LM2770SD-1215 from Texas Instruments, in a WSON-10-EP(3x3). 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 | VSEL | input | Output voltage select logic input: high selects the high output voltage (VOUT-H) and low selects the low output voltage (VOUT-L). |
| 2 | EN | input | Enable logic input: high enables the part and low places it in shutdown. |
| 3 | C2+ | passive | Positive terminal of flying capacitor 2. |
| 4 | GND | power_in | Ground reference; all voltages are specified with respect to the GND pin. |
| 5 | C2- | passive | Negative terminal of flying capacitor 2. |
| 6 | VOUT | power_out | Regulated output voltage, driven by the switched-capacitor regulator in full-power mode or by the low-power linear regulator in sleep mode. |
| 7 | C1- | passive | Negative terminal of flying capacitor 1. |
| 8 | C1+ | passive | Positive terminal of flying capacitor 1. |
| 9 | VIN | power_in | Input voltage; recommended operating range is 2.7V to 5.5V. |
| 10 | SLEEP | input | Sleep mode logic input: high selects sleep mode with the output driven by a low-power linear regulator, low selects full-power mode with the output driven by the switched-capacitor regulator. |
| 11 | GND | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WSON-10-EP(3x3) |
| Category | Power Supply Chip |
| Pins | 11 |

## CAD (KiCad official)

- Symbol: `LM2770SD-1215`
- Footprint: `Package_SON:VSON-10-1EP_3x3mm_P0.5mm_EP1.2x2mm`
- 3D model: WSON-10-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `lm2770sd-1215-etched.step` / `lm2770sd-1215-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2770sd-1215.step` / `lm2770sd-1215.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/lm2770) (20 pp, sha256 `2ba4cc905d53992c`, 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/lm2770sd-1215-datasheet.pdf)