# TC7660M

**HGSEMI** · DC-DC Converters · SOP-8

TC7660M from HGSEMI, 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 | NC | unconnected | No connection; the datasheet lists this pin as not connected. |
| 2 | CAP+ | passive | Positive terminal of the external pump capacitor C1, charged to V+ during the first half cycle. |
| 3 | GND | power_in | Ground pin. |
| 4 | CAP- | passive | Negative terminal of the external pump capacitor C1, shifted to -V+ during the second half cycle. |
| 5 | Vout | power_out | Negative voltage output (nominally -V+); do not short the output to V+ above 5.5V for extended periods. |
| 6 | LV | input | Low-voltage selection pin: connect to GND to disable the internal regulator for better low-voltage operation, and leave open for supply voltages above 3.5V. |
| 7 | OSC | passive | Oscillator pin: left open for the nominal 10 kHz frequency, or connect an external capacitor to ground to lower the oscillator frequency. |
| 8 | V+ | power_in | Positive supply input, 2.5V to 9V operating range (absolute maximum input voltage +9V). |

## Key specifications

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

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power Efficiency | PEFF | 95 | 98 |  | % | RL=5kΩ | 3 |
| Voltage Conversion Efficiency | VOUTEFF | 98 | 99.9 |  | % | RL=∞ | 3 |
| Supply Current | I+ |  | 40 | 100 | µA | RL=∞ | 3 |
| Supply Voltage, High | V+H | 3.5 |  | 8 | V | LV Open | 3 |
| Supply Voltage, Low | V+L | 2.5 |  | 3.5 | V | LV to GND | 3 |
| Output Resistance | ROUT |  | 70 |  | Ω | IOUT=20mA, TA=25℃ | 3 |
| Output Resistance | ROUT |  | 120 |  | Ω | IOUT=5mA, V+=3V, TA=25℃ | 3 |
| Input voltage | VIN |  |  | 9 | V |  | 3 |
| LV pin input current | ILV |  |  | 20 | µA | V+>3.5V | 3 |
| Total Power Dissipation (SOP8) | Pd |  |  | 470 | mW | TA≤75℃ | 3 |
| Operating Ambient Temperature | TOpr | -25 |  | 60 | ℃ |  | 3 |
| Storage Temperature | Tstg | -65 |  | 150 | ℃ |  | 3 |
| Soldering temperature and time | Tsolder |  |  | 260 | ℃ | 10s | 3 |
| Lead Temperature (Soldering) | TL |  |  | 260 | ℃ | 10 seconds | 3 |

## CAD (KiCad official)

- Symbol: `TC7660M`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `tc7660m-etched.step` / `tc7660m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tc7660m.step` / `tc7660m.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/8757211560974929920) (12 pp, sha256 `bf1e0e914f19840a`, 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/tc7660m-datasheet.pdf)