# LTP3328NXF4

**Linearin(先积集成)** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · DFN1x1-4

LTP3328NXF4 from Linearin(先积集成), in a DFN1x1-4. 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 | OUT | power_out | Regulated output pin; bypass with a 1μF ceramic capacitor to ground (1μF to 2.2μF recommended, ESR 5mΩ to 100mΩ). |
| 2 | GND | power_in | Ground. |
| 3 | EN | input | Enable control input, active high (low threshold 0.4V, high threshold 1.4V); do not leave floating, tie to IN if unused. |
| 4 | IN | power_in | Supply input (2.5V to 6.0V); must be closely decoupled to GND with a 1μF or greater ceramic capacitor. |
| 5 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Linearin(先积集成) |
| Package | DFN1x1-4 |
| 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 Voltage Operation Range | VIN | 2.5 |  | 6 | V |  | 6 |
| Dropout Voltage | VDROP |  | 260 | 350 | mV | VOUT ≥2.8V, IOUT = 300mA | 6 |
| DC Supply Quiescent Current | IQ_ON |  | 40 | 70 | µA | Active mode: VEN = VIN | 6 |
| DC Supply Shutdown Current | IQ_OFF |  | 0.01 | 1 | µA | VEN = 0V | 6 |
| Regulated Output Voltage | VOUT | -2 |  | 2 | % | IOUT = 1mA, -40℃ ≤ TA ≤85℃ | 6 |
| Output Voltage Line Regulation |  |  | 0.03 | 0.2 | % | VIN = VOUT + 1 to 5.5V, IOUT = 10mA | 6 |
| Output Voltage Load Regulation |  |  | 0.1 | 0.4 | % | IOUT from 0 to 300mA | 6 |
| IN Voltage |  | -0.3 |  | 6.5 | V |  | 5 |
| Other Pin Voltage (max VIN + 0.3 V) |  | -0.3 |  |  | V |  | 5 |
| Maximum Load Current |  |  |  | 500 | mA |  | 5 |
| Junction to Ambient Thermal Resistance (θJA) DFN1×1-4 | θJA |  | 250 |  | ºC/W |  | 5 |
| Junction Temperature |  |  |  | 150 | ºC |  | 5 |
| Storage Temperature |  | -65 |  | 150 | ºC |  | 5 |
| Lead Temperature (Soldering, 10 sec) |  |  |  | 300 | ºC |  | 5 |
| Operating Temperature Range |  | -40 |  | 85 | ºC |  | 5 |

## CAD (KiCad official)

- Symbol: `LTP3328NXF4`
- Footprint: `Package_DFN_QFN:UDFN-4-1EP_1x1mm_P0.65mm_EP0.48x0.48mm`
- 3D model: DFN1x1-4 (KiCad packages3D, STEP)
- 3D model files: `ltp3328nxf4-etched.step` / `ltp3328nxf4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ltp3328nxf4.step` / `ltp3328nxf4.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Linearin(先积集成) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603144045007298560) (15 pp, sha256 `14674030cdbe644f`, 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/ltp3328nxf4-datasheet.pdf)