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WST4054
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Winsok Semicon Battery Management, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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WST4054
Winsok Semicon · Battery Management · SOT-23-5
WST4054 from Winsok Semicon, 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 | CHRG | output | Open-drain charge-status output that is strongly pulled down while a charge cycle is in progress, and after termination its state is set by the undervoltage lockout condition. |
| 2 | GND | power_in | Ground pin of the charger IC. |
| 3 | BAT | power_out | Charge current output to the single-cell Li-ion battery, rated at 500 mA maximum (IBAT) with a 7 V maximum BAT voltage in the absolute maximum ratings. |
| 4 | VCC | power_in | Positive input supply for the charger, specified at 4.25 V to 6.5 V with a 7 V absolute maximum rating and a 3.7 V rising UVLO threshold. |
| 5 | PROG | bidirectional | Charge-current setting, charge-current monitoring and shutdown pin; a resistor to GND sets the charge current (IBAT = 1000/RPROG), charge terminates when PROG falls to 100 mV, and PROG absolute maximum voltage is VCC+0.3 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Winsok Semicon |
| Package | SOT-23-5 |
| 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 (VCC input supply voltage) | VCC | 4.25 | 6.5 | V | 2 | ||
| 芯片消耗电流 充电模式 (IC supply current, charge mode) | ICC | 110 | 500 | uA | 充电模式（3）,RPROG=10k | 2 | |
| 芯片消耗电流 低功耗模式 (charge complete) | ICC | 45 | uA | 低功耗模式（充电完成） | 2 | ||
| 芯片消耗电流 关断模式 (shutdown mode) | ICC | 35 | 50 | uA | 关断模式(RPROG没有连接,VCC<VBAT,or VCC<VUV) | 2 | |
| 稳定浮充电压 (float voltage) | VFLOAT | 4.158 | 4.2 | 4.242 | V | VBAT<VTRIKL,RPROG=10k | 2 |
| BAT充电电流 当前模式 (constant-current charge current) | IBAT | 90 | 100 | 130 | mA | 当前模式，RPROG=10k | 2 |
| BAT充电电流 当前模式 (constant-current charge current, RPROG=2k) | IBAT | 500 | mA | 当前模式，RPROG=2k | 2 | ||
| BAT电流 低功耗模式 (BAT leakage, low-power mode) | IBAT | -5 | 5 | uA | 低功耗模式,VBAT=4.2V | 2 | |
| BAT电流 关断模式 (BAT leakage, shutdown mode) | IBAT | -5 | 5 | uA | 关断模式（RPROG没有连接） | 2 | |
| BAT电流 睡眠模式 (BAT leakage, sleep mode) | IBAT | -5 | 5 | uA | 睡眠模式,VCC=0V | 2 | |
| 涓流充电电流 (trickle charge current) | ITRIKL | 10 | mA | VBAT<VTRIKL,RPROG=10k | 2 | ||
| 涓流充电阈值电压 (trickle charge threshold) | VTRIKL | 2.8 | 2.9 | 3 | V | RPROG=10k,VBAT上升 | 2 |
| VCC欠压锁定阈值 (UVLO threshold) | VUV | 3.7 | V | From VCC Low to High | 2 | ||
| VCC欠压锁定迟滞 (UVLO hysteresis) | VUVHYS | 130 | mV | 2 | |||
| VCC充电阈值电压 (charge threshold, rising) | VASD | 100 | mV | VCC从低到高 | 2 | ||
| VCC充电阈值电压 (charge threshold, falling) | VASD | 30 | mV | VCC从高到低 | 2 | ||
| CHRG引脚输出电压 (CHRG output voltage) | VCHRG | 20 | 50 | mV | ICHRG=5mA | 2 | |
| 充电基准电压 (charge reference voltage) | VPROG | 0.9 | 1 | 1.1 | V | 当前模式，RPROG=10k | 2 |
| 自动重充迟滞电压 (auto-recharge hysteresis) | △VRECHRG | 150 | mV | VFLOAT - VRECHRG | 2 | ||
| 过温关断点 (thermal shutdown threshold) | TLIM | 150 | ℃ | 2 | |||
| PROG上拉电流 (PROG pull-up current) | IPROG | 1.5 | uA | 2 | |||
| 输入电源电压 (input supply voltage, absolute max) | VCC | 7 | V | 3 | |||
| 输入电压 (input voltage) | VIN | -0.3 | 7 | V | 3 | ||
| BAT电压 (BAT voltage) | VBAT | 7 | V | 3 | |||
| CHRG电压 (CHRG voltage) | VCHRG | 7 | V | 3 | |||
| BAT电流 (BAT current) | IBAT | 500 | mA | 3 | |||
| PROG电流 (PROG current) | IPROG | 800 | uA | 3 | |||
| 最高结温 (maximum junction temperature) | TJ | 125 | ℃ | 3 | |||
| 内部结温 (internal junction temperature range) | TJ | -40 | 85 | ℃ | 3 | ||
| 贮藏温度 (storage temperature) | TS | -65 | 125 | ℃ | 3 | ||
| 焊接温度 (soldering temperature) | 300 | ℃ | 不超过10sec | 3 |
CAD (KiCad official)
- Symbol:
WST4054 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
wst4054-etched.step/wst4054-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);wst4054.step/wst4054.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Winsok Semicon datasheet (4 pp, sha256
ad919efe2567e165, retrieved 2026-10-19, 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, primaryclaude-haiku-5-5(text), consensusclaude-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).
# WST4054
**Winsok Semicon** · Battery Management · SOT-23-5
WST4054 from Winsok Semicon, 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 | CHRG | output | Open-drain charge-status output that is strongly pulled down while a charge cycle is in progress, and after termination its state is set by the undervoltage lockout condition. |
| 2 | GND | power_in | Ground pin of the charger IC. |
| 3 | BAT | power_out | Charge current output to the single-cell Li-ion battery, rated at 500 mA maximum (IBAT) with a 7 V maximum BAT voltage in the absolute maximum ratings. |
| 4 | VCC | power_in | Positive input supply for the charger, specified at 4.25 V to 6.5 V with a 7 V absolute maximum rating and a 3.7 V rising UVLO threshold. |
| 5 | PROG | bidirectional | Charge-current setting, charge-current monitoring and shutdown pin; a resistor to GND sets the charge current (IBAT = 1000/RPROG), charge terminates when PROG falls to 100 mV, and PROG absolute maximum voltage is VCC+0.3 V. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Winsok Semicon |
| Package | SOT-23-5 |
| 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 (VCC input supply voltage) | VCC | 4.25 | | 6.5 | V | | 2 |
| 芯片消耗电流 充电模式 (IC supply current, charge mode) | ICC | | 110 | 500 | uA | 充电模式（3）,RPROG=10k | 2 |
| 芯片消耗电流 低功耗模式 (charge complete) | ICC | | 45 | | uA | 低功耗模式（充电完成） | 2 |
| 芯片消耗电流 关断模式 (shutdown mode) | ICC | | 35 | 50 | uA | 关断模式(RPROG没有连接,VCC<VBAT,or VCC<VUV) | 2 |
| 稳定浮充电压 (float voltage) | VFLOAT | 4.158 | 4.2 | 4.242 | V | VBAT<VTRIKL,RPROG=10k | 2 |
| BAT充电电流 当前模式 (constant-current charge current) | IBAT | 90 | 100 | 130 | mA | 当前模式，RPROG=10k | 2 |
| BAT充电电流 当前模式 (constant-current charge current, RPROG=2k) | IBAT | | 500 | | mA | 当前模式，RPROG=2k | 2 |
| BAT电流 低功耗模式 (BAT leakage, low-power mode) | IBAT | -5 | | 5 | uA | 低功耗模式,VBAT=4.2V | 2 |
| BAT电流 关断模式 (BAT leakage, shutdown mode) | IBAT | -5 | | 5 | uA | 关断模式（RPROG没有连接） | 2 |
| BAT电流 睡眠模式 (BAT leakage, sleep mode) | IBAT | -5 | | 5 | uA | 睡眠模式,VCC=0V | 2 |
| 涓流充电电流 (trickle charge current) | ITRIKL | | 10 | | mA | VBAT<VTRIKL,RPROG=10k | 2 |
| 涓流充电阈值电压 (trickle charge threshold) | VTRIKL | 2.8 | 2.9 | 3 | V | RPROG=10k,VBAT上升 | 2 |
| VCC欠压锁定阈值 (UVLO threshold) | VUV | | 3.7 | | V | From VCC Low to High | 2 |
| VCC欠压锁定迟滞 (UVLO hysteresis) | VUVHYS | | 130 | | mV | | 2 |
| VCC充电阈值电压 (charge threshold, rising) | VASD | | 100 | | mV | VCC从低到高 | 2 |
| VCC充电阈值电压 (charge threshold, falling) | VASD | | 30 | | mV | VCC从高到低 | 2 |
| CHRG引脚输出电压 (CHRG output voltage) | VCHRG | | 20 | 50 | mV | ICHRG=5mA | 2 |
| 充电基准电压 (charge reference voltage) | VPROG | 0.9 | 1 | 1.1 | V | 当前模式，RPROG=10k | 2 |
| 自动重充迟滞电压 (auto-recharge hysteresis) | △VRECHRG | | 150 | | mV | VFLOAT - VRECHRG | 2 |
| 过温关断点 (thermal shutdown threshold) | TLIM | | 150 | | ℃ | | 2 |
| PROG上拉电流 (PROG pull-up current) | IPROG | | 1.5 | | uA | | 2 |
| 输入电源电压 (input supply voltage, absolute max) | VCC | | | 7 | V | | 3 |
| 输入电压 (input voltage) | VIN | -0.3 | | 7 | V | | 3 |
| BAT电压 (BAT voltage) | VBAT | | | 7 | V | | 3 |
| CHRG电压 (CHRG voltage) | VCHRG | | | 7 | V | | 3 |
| BAT电流 (BAT current) | IBAT | | | 500 | mA | | 3 |
| PROG电流 (PROG current) | IPROG | | | 800 | uA | | 3 |
| 最高结温 (maximum junction temperature) | TJ | | | 125 | ℃ | | 3 |
| 内部结温 (internal junction temperature range) | TJ | -40 | | 85 | ℃ | | 3 |
| 贮藏温度 (storage temperature) | TS | -65 | | 125 | ℃ | | 3 |
| 焊接温度 (soldering temperature) | | | | 300 | ℃ | 不超过10sec | 3 |
## CAD (KiCad official)
- Symbol: `WST4054`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `wst4054-etched.step` / `wst4054-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `wst4054.step` / `wst4054.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Winsok Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590225475760533504) (4 pp, sha256 `ad919efe2567e165`, retrieved 2026-10-19, 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/wst4054-datasheet.pdf)