# TPS61040M5

**HGSEMI** · DC-DC Converters · SOT-23-5

TPS61040M5 from HGSEMI, in a SOT-23-5. 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 | SW | input | Switch pin connected to the drain of the internal power MOSFET, where the inductor and Schottky diode connect, with a maximum switch voltage of 30 V. |
| 2 | GND | power_in | Ground pin for the device. |
| 3 | FB | input | Feedback pin that connects to the external voltage divider to program the output voltage, referenced to a typical 1.233 V. |
| 4 | EN | input | Enable pin: pulling it to ground forces shutdown with supply current below 1 mA, it must not be left floating, and the EN high threshold is 1.3 V minimum while the low threshold is 0.4 V maximum. |
| 5 | VIN | power_in | Supply voltage pin with an input voltage range of 1.8 V to 6 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input voltage range (recommended) | VIN | 1.8 |  | 6 | V |  | 5 |
| Output voltage range (recommended) | VOUT |  |  | 28 | V |  | 5 |
| Inductor (recommended) | L | 2.2 |  | 10 | mH |  | 5 |
| Switching frequency (recommended) | f |  |  | 1 | MHz |  | 5 |
| Input capacitor (recommended) | CIN |  |  | 4.7 | mF |  | 5 |
| Output capacitor (recommended) | COUT |  |  | 1 | mF |  | 5 |
| Operating ambient temperature (recommended) | TA | -40 |  | 85 | °C |  | 5 |
| Operating junction temperature (recommended) | TJ | -40 |  | 125 | °C |  | 5 |
| Input voltage range | VIN | 1.8 |  | 6 | V |  | 5 |
| Operating quiescent current | IQ |  | 28 | 50 | mA | IOUT = 0 mA, not switching, VFB = 1.3 V | 5 |
| Shutdown current | ISD |  | 0.1 | 1 | mA | EN = GND | 5 |
| Under-voltage lockout threshold | VUVLO |  | 1.5 | 1.7 | V |  | 5 |
| EN high level input voltage | VIH | 1.3 |  |  | V |  | 5 |
| EN low level input voltage | VIL |  |  | 0.4 | V |  | 5 |
| EN input leakage current | II |  | 0.1 | 1 | mA | EN = GND or VIN | 5 |
| Maximum switch voltage | Vsw |  |  | 30 | V |  | 5 |
| Minimum off time | toff | 250 | 400 | 550 | ns |  | 5 |
| Maximum on time | ton | 4 | 6 | 7.5 | ms |  | 5 |
| MOSFET on-resistance (TPS61040) | RDS(on) |  | 600 | 1000 | mΩ | VIN = 2.4 V; ISW = 200 mA | 5 |
| MOSFET leakage current |  |  | 1 | 10 | mA | VSW = 28 V | 5 |
| MOSFET current limit (TPS61040) | ILIM | 350 | 400 | 450 | mA |  | 5 |
| Internal voltage reference | Vref |  | 1.233 |  | V |  | 5 |
| Feedback input bias current | IFB |  |  | 1 | mA | VFB = 1.3 V | 5 |
| Feedback trip point voltage | VFB | 1.208 | 1.233 | 1.258 | V | 1.8 V ≤ VIN ≤ 6 V | 5 |
| Line regulation |  |  |  | 0.05 | %/V | 1.8 V ≤ VIN ≤ 6 V; VOUT = 18 V; Iload = 10 mA; CFF = not connected | 5 |
| Load regulation |  |  |  | 0.15 | %/mA | VIN = 2.4 V; VOUT = 18 V; 0 mA ≤ IOUT ≤ 30 mA | 5 |
| Adjustable output voltage range (electrical table) | VOUT |  |  | 28 | V |  | 5 |
| Supply voltage on pin VIN | VIN | -0.3 |  | 7 | V |  | 4 |
| Voltages on pins EN, FB (maximum is VIN + 0.3 V) |  | -0.3 |  |  | V |  | 4 |
| Switch voltage on pin SW |  |  |  | 30 | V |  | 4 |
| Operating junction temperature (absolute maximum) | TJ | -40 |  | 150 | °C |  | 4 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 4 |

## CAD (KiCad official)

- Symbol: `TPS61040M5`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `tps61040m5-etched.step` / `tps61040m5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps61040m5.step` / `tps61040m5.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HGSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590226351317299200) (18 pp, sha256 `eb72051301f5aee2`, retrieved 2026-10-18, 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/tps61040m5-datasheet.pdf)