# AP63301WU-7

**Diodes Incorporated** · DC-DC Converters · TSOT-23-6

AP63301WU-7 from Diodes Incorporated, 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 | FB | input | Feedback sensing terminal for the output voltage; connect it to the output resistive divider, which references the internal 0.8V reference (absolute maximum -0.3V to +6.0V). |
| 2 | EN | input | Enable input that turns the regulator on when driven high and off when driven low, with a 1.18V precision threshold for UVLO programming; connect to VIN or leave floating for automatic startup (absolute maximum -0.3V to +35.0V). |
| 3 | VIN | power_in | Power input that supplies the IC and the step-down power MOSFETs; drive with a 3.8V to 32V source and bypass to GND with a suitably large capacitor. |
| 4 | GND | power_in | Power ground. |
| 5 | SW | output | Power switching output node that supplies power to the output; connect the output LC filter from SW to the load (DC absolute maximum -0.3V to VIN + 0.3V). |
| 6 | BST | power_in | High-side gate drive boost input supplying the high-side N-channel MOSFET driver; a 100nF ceramic capacitor is recommended from BST to SW. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | TSOT-23-6 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| VIN Supply Pin Voltage | VIN | -0.3 |  | 35 | V | DC | 5 |
| VIN Supply Pin Voltage | VIN | -0.3 |  | 40 | V | 400ms | 5 |
| Feedback Pin Voltage | VFB | -0.3 |  | 6 | V |  | 5 |
| Enable/UVLO Pin Voltage | VEN | -0.3 |  | 35 | V |  | 5 |
| Switch Pin Voltage | VSW | -0.3 |  |  | V | DC; upper limit printed as VIN + 0.3 | 5 |
| Switch Pin Voltage | VSW | -2.5 |  |  | V | 20ns; upper limit printed as VIN + 2.0 | 5 |
| Storage Temperature | TST | -65 |  | 150 | °C |  | 5 |
| Junction Temperature | TJ |  |  | 160 | °C |  | 5 |
| Lead Temperature | TL |  |  | 260 | °C |  | 5 |
| ESD Susceptibility HBM |  |  |  | 2000 | V | Human Body Model | 5 |
| ESD Susceptibility CDM |  |  |  | 1000 | V | Charged Device Model | 5 |
| VIN Supply Voltage | VIN | 3.8 |  | 32 | V |  | 5 |
| Output Voltage | VOUT | 0.8 |  | 31 | V |  | 5 |
| Operating Ambient Temperature Range | TA | -40 |  | 85 | °C |  | 5 |
| Operating Junction Temperature Range | TJ | -40 |  | 125 | °C |  | 5 |
| Shutdown Supply Current | ISHDN |  | 1 | 3 | μA | VEN = 0V | 6 |
| VIN Undervoltage Rising Threshold |  |  | 3.5 | 3.7 | V |  | 6 |
| HS Peak Current Limit | IPEAK_LIMIT | 4.1 | 4.5 | 4.9 | A | Note 8 | 6 |
| Oscillator Frequency | fSW | 450 | 500 | 550 | kHz |  | 6 |
| Feedback Voltage | VFB | 792 | 800 | 808 | mV | CCM | 6 |
| EN Logic High | VEN_H |  | 1.18 | 1.25 | V |  | 6 |
| EN Logic Low | VEN_L | 1.03 | 1.09 |  | V |  | 6 |
| EN Input Current | IEN | 1 | 1.5 | 2 | μA | VEN = 1V | 6 |
| Junction to Ambient Thermal Resistance | θJA |  | 89 |  | °C/W | TSOT26; Note 6: FR-4 single-layer PCB, 2oz copper, minimum recommended pad layout | 5 |
| Junction to Case Thermal Resistance | θJC |  | 39 |  | °C/W | TSOT26; Note 6: FR-4 single-layer PCB, 2oz copper, minimum recommended pad layout | 5 |

## CAD (KiCad official)

- Symbol: `AP63301WU-7`
- Footprint: `Package_TO_SOT_SMD:TSOT-23-6`
- 3D model: TSOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `ap63301wu-7-etched.step` / `ap63301wu-7-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ap63301wu-7.step` / `ap63301wu-7.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589924033677590528) (22 pp, sha256 `340ed01139a0147f`, retrieved 2026-10-09, 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/ap63301wu-7-datasheet.pdf)