# LP4074B5F

**LOWPOWER** · Battery Management ICs · SOT-23-5

LP4074B5F from LOWPOWER, 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 | STAT1 | output | Open-drain charge status output that is pulled low by an internal N-channel MOSFET while the battery is charging and pulled high when the charge cycle is completed. |
| 2 | GND | power_in | Ground reference pin for the charger. |
| 3 | BAT | power_out | Charge current output that supplies the battery and regulates the final float voltage to 4.2V. |
| 4 | VIN | power_in | Positive input supply voltage, specified for an adapter/USB voltage range of 4.5V to 6.5V with a 3.8V VIN undervoltage lockout threshold. |
| 5 | ISET | passive | Charge current program and monitor pin, programmed by a 1% resistor to ground; it servos to 1V in constant-current mode and IBAT = 1000/RISET. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LOWPOWER |
| Package | SOT-23-5 |
| Category | Power Management ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Adapter/USB Voltage Range | VIN | 4.5 | 5 | 6.5 | V |  | 4 |
| Input Supply Current | IIN |  |  | 50 | uA | Standby Mode (Charge Terminated) | 4 |
| Regulated Output (Float) Voltage | VFLOAT | 4.158 | 4.2 | 4.242 | V | IBAT = 40mA | 4 |
| BAT Pin Current (standby/sleep leakage, printed ±1 uA) |  | -1 |  | 1 | uA | Standby Mode, VBAT = 4.2V; Sleep Mode, VIN = 0V | 4 |
| STAT1/STAT2 Pin Output Low Voltage | VSTAT |  |  | 0.5 | V | ISTAT = 5mA | 4 |
| Input to GND (VIN) | VIN | -0.3 |  | 10 | V |  | 3 |
| Other Pin to GND |  | -0.3 |  | 8 | V |  | 3 |
| Maximum Junction Temperature | TJ |  |  | 125 | ℃ |  | 3 |
| Operating Junction Temperature Range | TJ | -20 |  | 85 | ℃ |  | 3 |
| Maximum Soldering Temperature |  |  |  | 260 | ℃ | at leads, 10 sec | 3 |
| ESD Susceptibility HBM |  |  |  | 2 | KV | Human Body Model | 3 |
| ESD Susceptibility MM |  |  |  | 200 | V | Machine Model | 3 |
| Maximum Power Dissipation (SOT23-5) | PD |  |  | 0.45 | W | TA = 25°C | 3 |
| BAT Pin Current (programmed, 10K ISET) | IBAT |  | 100 |  | mA | RISET = 10K, Current Mode | 4 |
| BAT Pin Current (programmed, 2K ISET) | IBAT |  | 500 |  | mA | RISET = 2K, Current Mode | 4 |
| Trickle Charge Threshold Voltage | VTRIKL |  | 3 |  | V | RISET = 10k, VBAT Rising | 4 |
| Trickle Charge Hysteresis Voltage | VTRHYS |  | 150 |  | mV | RISET = 10K | 4 |
| Trickle Charge Current | ITRIKL |  | 40 |  | mA | VBAT < VTRIKL, RISET = 10K | 4 |
| Trickle Charge Current | ITRIKL |  | 200 |  | mA | VBAT < VTRIKL, RISET = 2K | 4 |
| VIN Undervoltage Lockout Threshold | VUV |  | 3.8 |  | V | From VIN Low to High | 4 |
| VIN Undervoltage Lockout Hysteresis | VUVHYS |  | 200 |  | mV |  | 4 |
| VIN-VBAT Lockout Threshold Voltage | VASD |  | 150 |  | mV |  | 4 |
| C/10 Termination Current Threshold | ITERM |  | 15 |  | % IBAT |  | 4 |
| ISET Pin Voltage | VISET |  | 1 |  | V | RISET = 10K, Charge Mode | 4 |
| STAT1/2 Pin Weak Pull-Down Current | ISTAT |  | 5 |  | uA | ICHRG = 5V | 4 |
| Recharge Battery Threshold Voltage | ΔVRECHRG |  | 200 |  | mV | VFLOAT - VRECHRG | 4 |
| Thermal Resistance (junction to ambient) | SJA |  | 250 |  | ℃/W |  | 3 |

## CAD (KiCad official)

- Symbol: `LP4074B5F`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `lp4074b5f-etched.step` / `lp4074b5f-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lp4074b5f.step` / `lp4074b5f.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LOWPOWER datasheet](docs/lp4074b5f-datasheet.pdf) (8 pp, sha256 `1fea95dd9b9fdbc8`, retrieved 2026-10-30, 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/lp4074b5f-datasheet.pdf)