# LP78070FSPF

**LOWPOWER** · Motor Driver ICs · SOP-8-EP

LP78070FSPF from LOWPOWER, in a SOP-8-EP. 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 | VIN | power_in | Charging input; input voltage 4.4V to 5.5V (typ 5V), abs max -0.3V to 7V, UVLO threshold 3.6V. |
| 2 | V1 | bidirectional | LED and key control terminal 1 (LED1 gear indicator, SW1 reset key; LED drive current 5mA). |
| 3 | V2 | bidirectional | LED and key control terminal 2 (LED2 gear indicator, SW2 gear-set key; LED drive current 5mA). |
| 4 | V3 | output | LED display interface (LED3 gear indicator; LED drive current 5mA). |
| 5 | DR | output | Fan negative-terminal control (DR NMOS, RDS(ON) 250mOhm typ, abs max -0.3V to 12V to GND). |
| 6 | FB | input | Boost output voltage feedback; VFB 0.6V/0.9V/1.2V for gears 1/2/3, abs max -0.3V to 7V. |
| 7 | LX | passive | Boost NMOS drain (switch node, RDS(ON) 100mOhm, switching frequency 900kHz, abs max -0.3V to 12V as SW). |
| 8 | BAT | bidirectional | Lithium battery positive terminal for charge output (4.2V float) and boost input, abs max -0.3V to 7V. |
| 9 | GND | power_in | Ground and thermal exposed pad (PAD). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LOWPOWER |
| Package | SOP-8-EP |
| Category | Power Management ICs |
| Pins | 9 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Charge input voltage | VIN | 4.4 | 5 | 5.5 | V | TA=25°C, VIN=5V | 5 |
| Float voltage | VFLOAT | 4.158 | 4.2 | 4.242 | V | TA=25°C, VIN=5V | 5 |
| Input undervoltage threshold | VUVLO |  | 3.6 |  | V |  | 5 |
| Input UVLO hysteresis | VUVLO_HYS |  | 200 |  | mV |  | 5 |
| Adaptive voltage | VREG |  | 4.4 |  | V | IIN_LIM=500mA | 5 |
| Battery leakage current, VIN=5V boost off | IBAT |  | 9 |  | uA | VIN=5V，升压关断 | 5 |
| Battery leakage current, VIN=NC boost off | IBAT |  | 0.2 |  | uA | VIN=NC，升压关断 | 5 |
| Battery current, boost gear 3 no load | IBAT |  | 7 |  | uA | VIN=NC，升压3挡，空载 | 5 |
| Trickle charge threshold | VTRIKL |  | 1.9 |  | V |  | 5 |
| Recharge threshold | ΔVRECHRG |  | 180 |  | mV |  | 5 |
| Trickle charge current gear 1/2 | ITRIKL |  | 180 |  | mA | 1挡、2挡 | 5 |
| Trickle charge current gear 3 | ITRIKL |  | 300 |  | mA | 3挡 | 5 |
| Constant charge current gear 1/2 | ICHRG |  | 800 |  | mA | 1挡、2挡 | 5 |
| Constant charge current gear 3 | ICHRG |  | 1200 |  | mA | 3挡 | 5 |
| Battery low-voltage indication |  |  | 3.05 |  | V |  | 5 |
| Battery end-of-discharge voltage |  |  | 2.9 |  | V |  | 5 |
| FB reference voltage gear 1 | VFB |  | 0.6 |  | V | 1挡 | 5 |
| FB reference voltage gear 2 | VFB |  | 0.9 |  | V | 2挡 | 5 |
| FB reference voltage gear 3 | VFB |  | 1.2 |  | V | 3挡 | 5 |
| Boost switching frequency | fOSC |  | 900 |  | KHz |  | 5 |
| Boost power NMOS on-resistance | RDS(ON) |  | 100 |  | mΩ |  | 5 |
| DR NMOS on-resistance | RDS(ON)_DR |  | 250 |  | mΩ |  | 5 |
| LED drive current |  |  | 5 |  | mA |  | 5 |
| Minimum valid key press time |  |  | 25 |  | ms |  | 5 |
| VIN, BAT to GND |  | -0.3 |  | 7 | V |  | 4 |
| SW to GND |  | -0.3 |  | 12 | V |  | 4 |
| FB to GND |  | -0.3 |  | 7 | V |  | 4 |
| DR to GND |  | -0.3 |  | 12 | V |  | 4 |
| Maximum junction temperature |  |  |  | 125 | °C |  | 4 |
| Maximum soldering temperature |  |  |  | 260 | °C | lead, 10 s | 4 |
| Storage temperature |  | -55 |  | 150 | °C |  | 4 |
| ESD HBM |  |  |  | 2 | kV | 人体模型 HBM | 4 |
| ESD MM |  |  |  | 200 | V | 机械模型 MM | 4 |

## CAD (KiCad official)

- Symbol: `LP78070FSPF`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm`
- 3D model: SOP-8-EP (KiCad packages3D, STEP)
- 3D model files: `lp78070fspf-etched.step` / `lp78070fspf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lp78070fspf.step` / `lp78070fspf.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LOWPOWER datasheet](docs/lp78070fspf-datasheet.pdf) (8 pp, sha256 `78c6b3060b63191b`, retrieved 2026-10-22, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/lp78070fspf-datasheet.pdf)