# SY7301ADBC

**Silergy Corp** · LED Drivers · DFN-10-EP(3x3)

SY7301ADBC from Silergy Corp, in a DFN-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 | NC | unconnected | No connection; the datasheet lists this pin as not connected. |
| 2 | FB | input | Feedback pin; connect a resistor RFB between FB and GND to program the output current, ILED = 0.3V/RFB. |
| 3 | NC | unconnected | No connection; the datasheet lists this pin as not connected. |
| 4 | LX | output | Inductor node; connect an inductor from the power input to LX, with LX rated 42V absolute maximum. |
| 5 | LX | output | Inductor node; connect an inductor from the power input to LX, with LX rated 42V absolute maximum. |
| 6 | NC | unconnected | No connection; the datasheet lists this pin as not connected. |
| 7 | IN | power_in | Input pin; decouple to GND with 1µF or more ceramic capacitance, with input voltage range 2.8V to 40V. |
| 8 | OVP | input | Over-voltage protection input; connect to the output of the circuit, with a typical OVP threshold of 37V. |
| 9 | EN/PWM | input | Enable and dimming control; pull high to turn on the IC, and for PWM dimming the recommended frequency range is 200Hz to 1MHz with the first pulse longer than 200ns. |
| 10 | NC | unconnected | No connection; the datasheet lists this pin as not connected. |
| 11 | GND | power_in | Ground pin, provided as the exposed paddle on the DFN3X3-10 package. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Silergy Corp |
| Package | DFN-10-EP(3x3) |
| Category | LED Drivers |
| Pins | 11 |

## 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 | VIN | 2.8 |  | 40 | V |  | 3 |
| Quiescent Current | IQ |  | 100 | 200 | µA | VFB=0.3V | 3 |
| Shutdown Current | ISHDN |  | 10 | 15 | µA | EN=0 | 3 |
| Feedback Reference Voltage | VREF | 294 | 300 | 306 | mV |  | 3 |
| FB Input Current | IFB |  | 1 |  | µA | VFB=0.3V | 3 |
| Low Side Main FET RON | RDS(ON)1 |  | 200 |  | mΩ |  | 3 |
| Main FET Current Limit | ILIM1 |  | 2 |  | A |  | 3 |
| EN Rising Threshold | VENH |  | 1.5 |  | V |  | 3 |
| EN Falling Threshold | VENL |  | 0.4 |  | V |  | 3 |
| PWM Dimming Frequency |  | 0.2 |  | 1000 | kHz |  | 3 |
| IN UVLO Rising Threshold | VIN,UVLO |  | 2.7 |  | V |  | 3 |
| UVLO Hysteresis | UVLO,HYS |  | 0.1 |  | V |  | 3 |
| Switching Frequency | FSW | 0.8 | 1 | 1.2 | MHz |  | 3 |
| Minimum ON Time | TON,MIN |  | 100 |  | nS |  | 3 |
| Maximum Duty Cycle | DMAX |  |  | 95 | % |  | 3 |
| OVP Threshold | VOVP | 35 | 37 | 39 | V | Open LED | 3 |
| Thermal Shutdown Temperature | TSD |  | 150 |  | °C |  | 3 |
| Thermal Hysteresis | THYS |  | 20 |  | °C |  | 3 |
| Voltage on LX, IN, EN, OVP |  |  |  | 42 | V | LX, IN, EN, OVP pins | 2 |
| Voltage on all other pins |  |  |  | 4 | V | All other pins | 2 |
| Power Dissipation | PD |  |  | 2.6 | W | TA = 25°C, DFN3X3-10 | 2 |
| Junction Temperature Range (absolute maximum) |  |  |  | 150 | °C |  | 2 |
| Lead Temperature (Soldering) |  |  |  | 260 | °C | Soldering, 10 sec. | 2 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 2 |
| Junction-to-ambient thermal resistance | θJA |  | 48 |  | °C/W | DFN3X3-10, Note 2 test board | 2 |
| Junction-to-case thermal resistance | θJC |  | 8 |  | °C/W | DFN3X3-10 | 2 |
| Input Voltage Supply |  | 2.8 |  | 40 | V |  | 2 |
| Junction Temperature Range (recommended) |  | -40 |  | 125 | °C |  | 2 |
| Ambient Temperature Range |  | -40 |  | 85 | °C |  | 2 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | 4) The PCB copper area associated with LX pin must | 7 |

## CAD (KiCad official)

- Symbol: `SY7301ADBC`
- Footprint: `Package_DFN_QFN:DFN-10-1EP_3x3mm_P0.5mm_EP1.55x2.48mm`
- 3D model: DFN-10-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `sy7301adbc-etched.step` / `sy7301adbc-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sy7301adbc.step` / `sy7301adbc.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Silergy Corp datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588881609671495680) (11 pp, sha256 `df4de34342f8b930`, 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/sy7301adbc-datasheet.pdf)