# GN4054B

**GN Semic** · Battery Management · SOT23-5

GN4054B from GN Semic, in a SOT23-5. 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 | CHRG | output | Open-drain charge status output that an internal N-channel MOSFET pulls low during charging, turns off when the charge cycle ends, and forces to high impedance when undervoltage lockout is detected. |
| 2 | GND | power_in | Ground reference pin. |
| 3 | BAT | power_out | Charge current output to the battery that regulates the final float voltage to 4.2 V through a precision internal resistor divider, which is disconnected in shutdown mode. |
| 4 | VCC | power_in | Positive input supply that powers the charger, stated as 4.3 V to 6 V in the pin description and to be bypassed with a 0.1 to 1 uF capacitor, with the device entering shutdown and battery drain falling below 2 uA when VCC drops to within 30 mV of the BAT pin voltage. |
| 5 | PROG | passive | Charge current set, monitor, and shutdown pin where a 1% resistor to GND sets the charge current via Ibat = 1000/Rprog, the pin is held at 1 V in constant-current mode, and pulling it above the 1 V shutdown threshold stops charging. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | GN Semic |
| Package | SOT23-5 |
| 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 |
|---|---|---|---|---|---|---|---|
| 输入电源电压 (input supply voltage) | VCC | 4.5 | 5 | 6 | V | 输入电源电压 | 4 |
| 输入电源电流 charge mode | ICC |  | 160 | 500 | uA | 充电模式，Rprog=10K | 4 |
| 输入电源电流 standby (charge terminated) | ICC |  | 50 | 150 | uA | 待机模式（充电终止） | 4 |
| 输入电源电流 shutdown | ICC |  | 50 | 150 | uA | 停机模式 | 4 |
| 输入电源电流 VCC<VBAT or VCC<VUV | ICC |  | 50 | 150 | uA | VCC<Bbat 或 VCC<Vuv | 4 |
| 输出浮充电压 (float voltage) | VFLOAL | 4.13 | 4.2 | 4.26 | V |  | 4 |
| BAT 引脚电流 constant current mode | IBAT | 85 | 100 | 115 | mA | RPROG=10K，电流模式 | 4 |
| BAT 引脚电流 constant current mode | IBAT | 425 | 500 | 575 | mA | RPROG=2K，电流模式 | 4 |
| BAT 引脚电流 standby | IBAT | 0 | -2.5 | -6 | uA | 待机模式，Vbat=4.2V | 4 |
| BAT 引脚电流 shutdown (RPROG not connected) | IBAT | -2 | 1 | 2 | uA | 停机模式（RPROG 未连接） | 4 |
| BAT 引脚电流 sleep mode | IBAT | -1 |  | -2 | uA | 睡眠模式，VCC=0 | 4 |
| 涓流充电电流 (trickle charge current) | ITRIKL | 85 | 100 | 115 | mA | VBAT<VTRIKL，Rprog=2K | 4 |
| 涓流充电门限电压 (trickle threshold) | VTRIKL | 2.7 | 2.85 | 3 | V | RPROG=10K，Vbat 上升 | 4 |
| 涓流充电迟滞电压 (trickle hysteresis) | VTRHYS | 60 | 150 | 200 | mV | RPROG=10K | 4 |
| VCC 欠压闭锁门限 (UVLO threshold) | VUV | 3.7 | 3.8 | 3.99 | V | 从 VCC 低至高 | 4 |
| VCC 欠压闭锁迟滞 (UVLO hysteresis) | VUVHYS | 150 | 250 | 300 | mV |  | 4 |
| 手动停机门限电压 (manual shutdown threshold, rising) | VMSD | 0.96 | 1.05 | 1.1 | V | PROG 引脚电平上升 | 4 |
| 手动停机门限电压 (manual shutdown threshold, falling) | VMSD | 0.9 | 1 | 1.1 | V | PROG 引脚电平下降 | 4 |
| 闭锁门限电压 (ASD threshold, VCC low to high) | VASD | 70 | 120 | 180 | mV | VCC 从低到高 | 4 |
| 闭锁门限电压 (ASD threshold, VCC high to low) | VASD | 5 | 40 | 120 | mV | VCC 从高到低 | 4 |
| C/10 终止电流门限 (termination current) | ITERM | 0.085 | 0.1 | 0.115 | mA | RPROG=10K | 4 |
| PROG 引脚电压 (PROG pin voltage) | VPROG | 0.9 | 1 | 1.08 | V | RPROG=10K，电流模式 | 4 |
| 引脚输出低电压 (CHRG output low voltage) | VCHRG | 0.1 | 0.35 | 0.6 | V | ICHRG=5mA | 4 |
| 再充电电池门限电压 (recharge threshold) | ΔVRECHRG | 100 | 120 | 200 | mV | VFLOAT-VRECHRG | 4 |
| 限定温度模式中的结温 (junction temperature limit) | TLIM |  | 120 |  | ℃ |  | 4 |
| 功率 FET 导通电阻 (power FET on-resistance) | RON |  | 1700 |  | mΩ |  | 4 |
| 软启动时间 (soft-start time) | Tss |  | 100 |  | us | IBAT=0 至 Ibat=1000/Rprog | 4 |
| 再充电比较器滤波时间 (recharge comparator filter time) | tRECHARGE | 0.75 | 2 | 4 | ms | VBAT 高至低 | 4 |
| 终止比较器滤波时间 (termination comparator filter time) | tTERM | 0.8 | 1.8 | 4 | ms | IBAT 降至 Ichg/10 以下 | 4 |
| PROG 引脚上拉电流 (PROG pull-up current) | IPROG |  | 3 |  | uA |  | 4 |
| 输入电源电压 (input supply voltage, absolute maximum table) |  | 4.5 |  | 6 | V | 输入电源电压 | 3 |
| PROG pin voltage | PROG | -0.3 |  |  | V | 上限为 VCC+0.3V | 3 |
| BAT pin voltage | BAT | -0.3 |  | 7 | V |  | 3 |
| CHRG pin voltage | CHRG | -0.3 |  | 7 | V |  | 3 |
| BAT pin current |  |  |  | 500 | mA |  | 3 |
| PROG pin current |  |  |  | 800 | uA |  | 3 |
| 最大结温 (maximum junction temperature) |  |  |  | 145 | ℃ |  | 3 |
| 工作环境温度范围 (operating ambient temperature) |  | -20 |  | 85 | ℃ |  | 3 |
| 贮存温度范围 (storage temperature) |  | -65 |  | 125 | ℃ |  | 3 |
| 引脚温度 (lead temperature, soldering) |  |  |  | 260 | ℃ | 焊接时间 10s | 3 |
| VCC 工作电压范围 (VCC range) | VCC | 4.3 |  | 6 | V | VCC 的变化范围 | 2 |

## CAD (KiCad official)

- Symbol: `GN4054B`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT23-5 (KiCad packages3D, STEP)
- 3D model files: `gn4054b-etched.step` / `gn4054b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gn4054b.step` / `gn4054b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [GN Semic datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602845563306467328) (5 pp, sha256 `e6c9bffbcec538f4`, retrieved 2026-10-18, 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-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/gn4054b-datasheet.pdf)