# FR9206S9

**FITIPOWER** · Others · TSOT-23-6

FR9206S9 from FITIPOWER, in a TSOT-23-6. 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 | GND | power_in | Ground pin. |
| 2 | LX | passive | Power switching node to which the external inductor is connected, absolute maximum -0.3V to (VIN+0.3V). |
| 3 | VIN | power_in | Power supply input pin for 4.5V to 18V operation, with input capacitors placed as close as possible from VIN to GND to avoid noise influence. |
| 4 | FB | input | Voltage feedback input connected to VOUT through a resistive divider, regulated at 0.768V. |
| 5 | SHDN | input | Enable input pin: pull high (above 1.5V) to turn on the IC and low (below 0.5V) to turn it off, or connect to VIN with a 100kΩ resistor for self-startup. |
| 6 | BST | passive | High-side gate drive boost pin requiring a 100nF~1μF capacitor from this pin to LX to fully turn on the internal high-side NMOS. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | FITIPOWER |
| Package | TSOT-23-6 |
| Category | Others |
| Pins | 6 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Feedback Voltage | VFB | 0.757 | 0.768 | 0.779 | V | 4.5V≦VIN≦18V | 5 |
| VIN Shutdown Supply Current | ISD |  | 0.1 | 1 | μA | EN=0V | 5 |
| Feedback Input Current | IFB |  | 0.01 | 0.1 | μA | VFB=1V | 5 |
| Input Supply Voltage UVLO Threshold | VUVLO(Vth) | 3.7 | 4 | 4.3 | V | VIN Rising | 5 |
| SHDN Input Low Voltage | VIL |  |  | 0.5 | V |  | 5 |
| SHDN Input High Voltage | VIH | 1.5 |  |  | V |  | 5 |
| VIN Quiescent Current | IDDQ |  | 0.3 |  | mA | EN=2V, VFB=1V | 5 |
| High-Side MOSFET RDS(ON) | RDS(ON) |  | 80 |  | mΩ |  | 5 |
| Low-Side MOSFET RDS(ON) | RDS(ON) |  | 40 |  | mΩ |  | 5 |
| Valley Current Limit | ILIMIT |  | 4 |  | A | Not production tested | 5 |
| On Time | TON |  | 140 |  | ns | VIN=12V, VOUT=1.05V | 5 |
| Minimum Off Time | TOFF(MIN) |  | 200 |  | ns | VFB=0.4V | 5 |
| UVLO Threshold Hysteresis | VUVLO(HYS) |  | 0.25 |  | V |  | 5 |
| Internal Soft-Start Period | TSS |  | 1.5 |  | ms | Not production tested | 5 |
| SHDN Input Current |  |  | 2 |  | μA | EN=2V | 5 |
| Thermal Shutdown Threshold | TSD |  | 160 |  | °C | Not production tested | 5 |
| Thermal Shutdown Hysteresis | THYS |  | 30 |  | °C | Not production tested | 5 |
| Supply Voltage | VIN | 4.5 |  | 18 | V |  | 4 |
| Operation Temperature Range |  | -40 |  | 85 | °C |  | 4 |
| Supply Voltage VIN | VIN | -0.3 |  | 20 | V |  | 4 |
| Enable Voltage |  | -0.3 |  | 20 | V |  | 4 |
| LX Voltage | VLX | -0.3 |  |  | V | to (VIN +0.3V) | 4 |
| Dynamic LX Voltage |  | -5 |  |  | V | in 15ns duration, -5V to VIN +5V | 4 |
| BST Pin Voltage | VBST | -0.3 |  |  | V | to (VLX +6.5V) | 4 |
| All Other Pins Voltage |  | -0.3 |  | 6 | V |  | 4 |
| Maximum Junction Temperature | TJ |  |  | 150 | °C |  | 4 |
| Storage Temperature | TS | -65 |  | 150 | °C |  | 4 |
| Lead Temperature |  |  |  | 260 | °C | Soldering, 10sec | 4 |
| Package Thermal Resistance | θJA |  | 85 |  | °C/W | TSOT-23-6, JEDEC-51-7 4-layer board, 25°C ambient | 4 |
| Package Thermal Resistance | θJC |  | 20 |  | °C/W | TSOT-23-6 | 4 |

## CAD (KiCad official)

- Symbol: `FR9206S9`
- Footprint: `Package_TO_SOT_SMD:TSOT-23-6`
- 3D model: TSOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `fr9206s9-etched.step` / `fr9206s9-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fr9206s9.step` / `fr9206s9.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FITIPOWER datasheet](docs/fr9206s9-datasheet.pdf) (9 pp, sha256 `efa6d007282acca0`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/fr9206s9-datasheet.pdf)