# FP6277XR-G1

**Advanced Analog Technology** · DC-DC Converters · SOP-8-EP

FP6277XR-G1 from Advanced Analog Technology, in a SOP-8-EP. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | LX | power_out | Power switch output. Internally tied to the drain of the integrated high-side/low-side MOSFETs; connect to the boost inductor. Absolute max VLX = 7 V. Pins 1 and 2 are tied together internally and must both be connected. |
| 2 | LX | power_out | Power switch output (second LX pin, internally tied to pin 1). Connect together with pin 1 to the boost inductor node. Absolute max VLX = 7 V. |
| 3 | VIN | power_in | IC power supply input. Operating range 2.4 V-4.5 V (absolute max 6 V). Bypass to GND with a low-ESR ceramic capacitor. |
| 4 | EN | input | Enable control, active high. VEN ≥ 0.96 V enables the converter; VEN ≤ 0.6 V places the part in shutdown (ICC ≈ 0.1 µA). Do not leave floating. |
| 5 | GND | power_in | IC signal/analog ground. Must be tied to the exposed pad (PGND) and to the system ground plane. |
| 6 | FB | input | Error-amplifier inverting input (feedback). Regulated to the internal 0.6 V reference (VREF = 0.588 V-0.612 V). Connect to a resistor divider from VOUT to set the output voltage: VOUT = 0.6 V × (1 + R_top/R_bot). |
| 7 | OC | input | Adjustable current-limit setting. Connect a resistor from OC to GND to program the cycle-by-cycle switch current limit (typ. IOCP = 7 A; see Ocset Resistance vs Current Limit curve). Resistor must return to ground. |
| 8 | VO | power_in | Output voltage sense pin. Connect to the boost converter output rail; used internally by the MUX/bulk-well switch and load-disconnect circuitry. Absolute max 6 V. |
| EP | PGND | power_in | Exposed thermal pad / power ground. Must be soldered to the PCB ground plane and connected to GND (pin 5) for proper operation and heat dissipation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Advanced Analog Technology |
| Package | SOP-8-EP |
| Category | PMIC |
| Pins | 9 |

## Ordering variants

Same part, different packaging or reel option.

- `FP6277XR-G1`

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VIN | 2.4 |  | 4.5 | V |  | 5 |
| Operating Temperature Range | TA | -40 |  | 85 | °C | Ambient Temperature | 5 |
| Feedback Voltage | VREF | 0.588 | 0.6 | 0.612 | V | VIN=4.5V | 5 |
| Supply Voltage | VIN | 0 |  | 6 | V |  | 4 |
| LX Voltage | VLX | 0 |  | 7 | V |  | 4 |
| EN,FB,OC,VO Voltage |  | 0 |  | 6 | V |  | 4 |
| Operating Temperature | TOP | -40 |  | 85 | °C |  | 4 |
| Storage Temperature | TST | -65 |  | 150 | °C |  | 4 |

## CAD (KiCad official)

- Symbol: `FP6277XR-G1`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`
- 3D model: SOP-8-EP (KiCad packages3D, STEP)
- 3D model files: `fp6277xr-g1-etched.step` / `fp6277xr-g1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fp6277xr-g1.step` / `fp6277xr-g1.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`fp6277xr-g1.step`](fp6277xr-g1.step) | 193 KB | You want the bare part, or you mark your own boards. |
| [`fp6277xr-g1-etched.step`](fp6277xr-g1-etched.step) | 1.6 MB | You want the part with `FP6277XR-G1` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 415 faces against 63 in the bare model. It
survives export, section views, and rendering in any CAD tool, and it drops straight
into KiCad or Fusion with no extra setup.

## Provenance

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

- **Datasheet:** [Advanced Analog Technology datasheet](docs/fp6277xr-g1-datasheet.pdf) (12 pp, sha256 `583d018398bfcefb`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/fp6277xr-g1-datasheet.pdf)