component
SK4054S5-42
Public Made by Adomby adom
Suntek Battery Management, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSK4054S5-42
Suntek · Battery Management · SOT-23-5
SK4054S5-42 from Suntek, 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 uses a strong pull-down (~10mA) during a charge cycle, a weak ~20µA pull-down after termination, and goes high-impedance in undervoltage lockout. |
| 2 | GND | power_in | Ground reference for the charger. |
| 3 | BAT | power_out | Charge current output to the battery, delivering up to 500mA in constant-current mode and regulating to a 4.2V float voltage. |
| 4 | VCC | power_in | Positive input supply; operating range 4.25V to 6.5V, with absolute maximum input voltage of 10V and undervoltage lockout threshold of about 3.8V. |
| 5 | PROG | bidirectional | Charge current program, monitor and shutdown pin: a 1% resistor to ground sets the charge current (1000 times the PROG current), PROG voltage is 1.0V at 10k in current mode, and floating the pin enters shutdown. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Suntek |
| 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 |
|---|---|---|---|---|---|---|---|
| VCC Input Voltage | -0.3 | 10 | V | 3 | |||
| PROG Voltage | -0.3 | V | 3 | ||||
| BAT Voltage | -0.3 | 7 | V | 3 | |||
| Operating Junction Temperature | TJ | -40 | 150 | °C | 3 | ||
| Storage Temperature | Tstg | -65 | 125 | °C | 3 | ||
| Operating Temperature Range | -40 | 85 | °C | 3 | |||
| Lead Temperature (Soldering) | 260 | °C | Soldering, 10sec. | 3 | |||
| Human Body Model ESD | V(ESD-HBM) | -2000 | 2000 | V | ANSI/ESDA/JEDEC JS-001-2014, Class: 2 | 3 | |
| Charged Device Model ESD | V(ESD-CDM) | -200 | 200 | V | ANSI/ESDA/JEDEC JS-002-2014, Class: C0b | 3 | |
| Latch-up | ILATCH-UP | -150 | 150 | mA | JEDEC STANDARD NO.78E APRIL 2016, Temperature Classification, Class: I | 3 | |
| Operating junction temperature | -40 | 125 | °C | 3 | |||
| Operating temperature range | -40 | 85 | °C | 3 | |||
| Input Supply Voltage | VCC | 4.25 | 6.5 | V | 4 | ||
| Input Supply Current (Charge Mode) | ICC | 300 | 2000 | μA | Charge Mode (Note 4), RPROG = 10k | 4 | |
| Input Supply Current (Standby Mode) | ICC | 200 | 500 | μA | Standby Mode (Charge Terminated) | 4 | |
| Input Supply Current (Shutdown Mode) | ICC | 25 | 50 | μA | Shutdown Mode (RPROG Not Connected, VCC < VBAT, or VCC < VUV) | 4 | |
| Regulated Output (Float) Voltage | VFLOAT | 4.116 | 4.2 | 4.284 | V | 0°C ≤ TA ≤ 85°C, IBAT = 40mA | 4 |
| BAT Pin Current (Current Mode) | IBAT | 93 | 100 | 107 | mA | RPROG = 10k, Current Mode | 4 |
| BAT Pin Current (Current Mode) | IBAT | 465 | 500 | 535 | mA | RPROG = 2k, Current Mode | 4 |
| BAT Pin Current (Standby Mode) | IBAT | 0 | -2.5 | -6 | μA | Standby Mode, VBAT = 4.2V | 4 |
| BAT Pin Current (Shutdown Mode) | IBAT | -2 | 1 | 2 | μA | Shutdown Mode (RPROG Not Connected) | 4 |
| BAT Pin Current (Sleep Mode) | IBAT | -2 | 1 | 2 | μA | Sleep Mode, VCC = 0V | 4 |
| Trickle Charge Current | ITRIKL | 20 | 45 | 70 | mA | VBAT < VTRIKL, RPROG = 2k | 4 |
| Trickle Threshold Charge Voltage | VTRIKL | 2.8 | 2.9 | 3 | V | RPROG = 10k, VBAT Rising | 4 |
| Trickle Hysteresis Charge Voltage | VTRHYS | 60 | 80 | 110 | mV | RPROG = 10k | 4 |
| VCC Undervoltage Lockout Threshold | VUV | 3.7 | 3.8 | 3.92 | V | From VCC Low to High | 4 |
| VCC Undervoltage Lockout Hysteresis | VUVHYS | 150 | 200 | 300 | mV | 4 | |
| Manual Shutdown Threshold Voltage (Rising) | VMSD | 1.15 | 1.21 | 1.3 | V | PROG Pin Rising | 4 |
| Manual Shutdown Threshold Voltage (Falling) | VMSD | 0.9 | 1 | 1.1 | V | PROG Pin Falling | 4 |
| VCC, VBAT Lockout Threshold Voltage (Low to High) | VASD | 70 | 100 | 140 | mV | VCC from Low to High | 4 |
| VCC, VBAT Lockout Threshold Voltage (High to Low) | VASD | 5 | 30 | 50 | mV | VCC from High to Low | 4 |
| C/10 Termination Current Threshold | ITERM | 0.085 | 0.1 | 0.115 | mA/mA | RPROG = 10k (Note 5) | 4 |
| C/10 Termination Current Threshold | ITERM | 0.085 | 0.1 | 0.115 | mA/mA | RPROG = 2k | 5 |
| PROG Pin Voltage | VPROG | 0.93 | 1 | 1.07 | V | RPROG = 10k, Current Mode | 5 |
| Charge Status Pin Leakage Current (CHRG) | ICHRG | 8 | 20 | 35 | μA | VCHRG = 5V | 5 |
| CHRG Pin Output Low Voltage | VCHRG | 0.35 | 0.6 | V | ICHRG = 5mA | 5 | |
| Recharge Battery Threshold Voltage | ΔVRECHRG | 100 | 150 | 200 | mV | VFLOAT - VRECHRG | 5 |
| Recharge Comparator Filter Time | tRECHARGE | 0.75 | 2 | 4.5 | mS | VBAT High to Low | 5 |
| Termination Comparator Filter Time | tTERM | 400 | 1000 | 2500 | μS | IBAT Falling Below ICHG/10 | 5 |
| Junction Temperature in Constant Temperature Mode | TLIM | 120 | ℃ | 5 | |||
| Power FET ON Resistance (Between VCC and BAT) | RON | 600 | mΩ | 5 | |||
| Soft-Start Time | TSS | 100 | μS | IBAT = 0 to IBAT = 1000V/RPROG | 5 | ||
| PROG Pin Pull-Up Current | IPROG | 3 | μA | 5 | |||
| Junction-to-ambient thermal resistance | RθJA | 180 | °C/W | JESD 51-7, 4-layer JEDEC board | 4 | ||
| Junction-to-case (top) thermal resistance | RθJC(top) | 130 | °C/W | 4 | |||
| Junction-to-board thermal resistance | RθJB | 45 | °C/W | 4 | |||
| Junction-to-top characterization parameter | ψJT | 35 | °C/W | 4 | |||
| Junction-to-board characterization parameter | ψJB | 45 | °C/W | 4 |
CAD (KiCad official)
- Symbol:
SK4054S5-42 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
sk4054s5-42-etched.step/sk4054s5-42-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sk4054s5-42.step/sk4054s5-42.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Suntek datasheet (12 pp, sha256
cf2e011f5cbc1c87, retrieved 2026-10-19, tier: lcsc) - 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).