# TPS62740DSST

**Texas Instruments** · DC-DC Converters · WSON-12-EP(2x3)

TPS62740DSST from Texas Instruments, in a WSON-12-EP(2x3). 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 | VIN | power_in | Power supply input pin for 2.2V to 5.5V; connect close to VIN terminal of 4.7µF minimum input capacitor. |
| 2 | SW | output | Internal MOSFET switch node; connect external inductor to this terminal for buck converter switching operation. |
| 3 | GND | power_in | Ground supply pin; connect close to GND terminal of input and output capacitors. |
| 4 | CTRL | input | Control input pin for LOAD output; high enables LOAD output (connects to VOUT), low disables and pulls LOAD to GND; must be terminated. |
| 5 | VOUT | input | Feedback voltage input pin for internal feedback divider network and regulation loop; connect directly to output capacitor with short trace; internal load switch connects LOAD to VOUT. |
| 6 | LOAD | output | Switched output controlled by CTRL pin; high at VOUT when CTRL high (system power supply), pulled to GND when CTRL low; provides soft switching and load control. |
| 7 | PG | tri_state | Power good open-drain output; high-impedance state indicates power good condition; connect external pull-up resistor for logic high level. |
| 8 | VSEL4 | input | Output voltage selection pin (MSB of 4-bit code); combined with VSEL3-VSEL1 selects output from 1.8V to 3.3V in 100mV steps per Table 1; must be terminated; changeable during operation. |
| 9 | VSEL3 | input | Output voltage selection input pin; combined with VSEL4, VSEL2, VSEL1 selects regulated output from 1.8V to 3.3V in 100mV steps per Table 1; must be terminated; changeable during operation. |
| 10 | VSEL2 | input | Output voltage selection input pin; combined with VSEL4, VSEL3, VSEL1 selects regulated output from 1.8V to 3.3V in 100mV steps per Table 1; must be terminated; changeable during operation. |
| 11 | VSEL1 | input | Output voltage selection pin (LSB of 4-bit code); combined with VSEL4-VSEL2 selects output from 1.8V to 3.3V in 100mV steps per Table 1; must be terminated; changeable during operation. |
| 12 | EN | input | Enable control input; high enables converter operation, low forces device into shutdown mode for low quiescent current; must be terminated. |
| 13 | EXPOSED THERMAL PAD | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WSON-12-EP(2x3) |
| Category | Power Management (PMIC) |
| Pins | 13 |

## CAD (KiCad official)

- Symbol: `TPS62740DSST`
- Footprint: `Package_SON:WSON-12-1EP_3x2mm_P0.5mm_EP1x2.65`
- 3D model: WSON-12-EP(2x3) (KiCad packages3D, STEP)
- 3D model files: `tps62740dsst-etched.step` / `tps62740dsst-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps62740dsst.step` / `tps62740dsst.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/tps62742) (33 pp, sha256 `170ebb1b21f3f96c`, retrieved 2026-10-01, 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/tps62740dsst-datasheet.pdf)