# LM2853MHX-2.5

**Texas Instruments** · DC-DC Converters · HTSSOP-14-EP

LM2853MHX-2.5 from Texas Instruments, in a HTSSOP-14-EP. 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 | AVIN | power_in | Input supply voltage for control logic with operating range 3V to 5.5V per recommended operating conditions |
| 2 | EN | input | Enable control input; regulator enabled when above 75% of AVIN, disabled when below 25% of AVIN |
| 3 | SGND | power_in | Low noise ground reference for control and signal circuitry |
| 4 | SS | input | Soft-start control node; connect 1nF to 50nF external capacitor to set startup ramp time |
| 5 | NC | unconnected | No internal connection; pin must be tied to ground externally |
| 6 | PVIN | power_in | Power supply input for switching stage with operating range 1.5V to 5.5V per recommended operating conditions |
| 7 | PVIN | power_in | Power supply input for switching stage with operating range 1.5V to 5.5V per recommended operating conditions |
| 8 | SW | output | High-frequency switch node output driven by internal synchronous FETs at 550kHz; connect to output filter inductor |
| 9 | SW | output | High-frequency switch node output driven by internal synchronous FETs at 550kHz; connect to output filter inductor |
| 10 | PGND | power_in | Power ground for output stage; connect to ground plane for thermal performance and noise reduction |
| 11 | PGND | power_in | Power ground for output stage; connect to ground plane for thermal performance and noise reduction |
| 12 | NC | unconnected | No internal connection; pin must be tied to ground externally |
| 13 | NC | unconnected | No internal connection; pin must be tied to ground externally |
| 14 | SNS | input | Output voltage feedback sense input with 432kΩ internal resistance; connect to output voltage divider or capacitor ESR node |
| 15 | EP | power_in | Thermal exposed pad internally connected to ground; solder to external ground plane for improved thermal dissipation and regulation performance |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-14-EP |
| Category | Power Supply Chip |
| Pins | 15 |

## CAD (KiCad official)

- Symbol: `LM2853MHX-2.5`
- Footprint: `Package_SO:TSSOP-14-1EP_4.4x5mm_P0.65mm`
- 3D model: HTSSOP-14-EP (KiCad packages3D, STEP)
- 3D model files: `lm2853mhx-2-5-etched.step` / `lm2853mhx-2-5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lm2853mhx-2-5.step` / `lm2853mhx-2-5.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/lm2853) (26 pp, sha256 `2e1d0a460160f6e1`, retrieved 2026-10-07, 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-4-5-20251001` (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/lm2853mhx-2-5-datasheet.pdf)