# FP6356S5

**Fitipower Integrated Tech** · DC-DC Converters · SOT-23-5

FP6356S5 from Fitipower Integrated Tech, 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 | EN | input | Enable control pin that turns the IC on when pulled high and disables it when pulled low, and must not be left floating. |
| 2 | GND | power_in | Ground pin of the converter. |
| 3 | LX | output | Power switching node that connects the inductor to the drains of the internal high-side PMOS and low-side NMOS. |
| 4 | VIN | power_in | Power supply input pin operating from 2.5V to 6V, with input capacitors placed as close as possible from VIN to GND. |
| 5 | FB | input | Voltage feedback input that senses the output through a resistive divider and regulates it at 0.6V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Fitipower Integrated Tech |
| 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 Supply Voltage | VIN | 2.5 |  | 6 | V |  | 5 |
| Input Over Voltage Protection | VIN OVP |  |  | 6.3 | V |  | 5 |
| Shutdown Current | ISHDN |  | 0.1 | 1 | μA | EN=GND | 5 |
| Quiescent Current | Iq |  |  | 400 | μA | VFB=0.65V, IOUT=0A | 5 |
| Reference Voltage | VREF | 0.588 | 0.6 | 0.612 | V |  | 5 |
| FB Input Leakage Current | IFB |  | 0.01 | 1 | µA | VFB=VIN | 5 |
| P-Channel MOSFET On-Resistance | RDS(ON) |  | 140 |  | mΩ |  | 5 |
| N-Channel MOSFET On-Resistance | RDS(ON) |  | 90 |  | mΩ |  | 5 |
| P-Channel Current Limit | ILIM | 2.2 |  | 2.7 | A |  | 5 |
| N-Channel Current Limit | ILIM(NEG) |  |  | -0.9 | A | VIN=5V, VOUT=3.3V, L1=2.2uH | 5 |
| EN High-Level Input Voltage | VEN(H) | 1.5 |  |  | V |  | 5 |
| EN Low-Level Input Voltage | VEN(L) |  |  | 0.4 | V |  | 5 |
| Under Voltage Lockout Voltage | UVLO |  | 2.4 |  | V |  | 5 |
| UVLO Hysteresis | VHYS |  | 0.2 |  | V |  | 5 |
| Oscillation Frequency | FOSC | 0.8 | 1 | 1.2 | MHz | IOUT=300mA | 5 |
| Minimum On Time |  |  |  | 50 | ns |  | 5 |
| Maximum Duty Cycle |  |  |  | 100 | % |  | 5 |
| PG Rising Threshold | VPG (H) |  | 90 |  | % | VFB Rising | 5 |
| PG Low Threshold | VPG (L) |  | 85 |  | % | VFB falling | 5 |
| PG Sink Current | IPG |  |  | 1 | mA | VPG=0.1V | 5 |
| Internal Soft-Start Time | TSS |  | 1 |  | ms |  | 5 |
| VOUT Discharge Resistance |  |  |  | 100 | Ω |  | 5 |
| Thermal Shutdown Temperature | TSD |  |  | 150 | °C |  | 5 |
| VIN to GND |  | -0.3 |  | 6.5 | V |  | 4 |
| Junction Temperature (TJ) maximum | TJ |  |  | 150 | °C |  | 4 |
| Lead Temperature (Soldering) |  |  |  | 260 | °C | Soldering, 10sec. | 4 |
| Storage Temperature | TS | -65 |  | 150 | °C |  | 4 |
| Thermal Resistance Junction-to-Ambient SOT-23-5 | θJA |  |  | 250 | °C/W | Note 2: measured at 25°C ambient, JEDEC-51-7 board | 4 |
| Thermal Resistance Junction-to-Case SOT-23-5 | θJC |  |  | 130 | °C/W |  | 4 |
| Supply Voltage (VIN) recommended | VIN | 2.5 |  | 6 | V |  | 4 |
| Junction Temperature Range | TJ | -40 |  | 125 | °C |  | 4 |
| Operation Temperature Range | TOPR | -40 |  | 85 | °C |  | 4 |

## CAD (KiCad official)

- Symbol: `FP6356S5`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `fp6356s5-etched.step` / `fp6356s5-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fp6356s5.step` / `fp6356s5.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Fitipower Integrated Tech datasheet](docs/fp6356s5-datasheet.pdf) (14 pp, sha256 `1a0288dbb63d5fe8`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `off` (skipped (clean text read)), 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/fp6356s5-datasheet.pdf)