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SK4054S5-42

Public Made by Adom

by adom

Suntek Battery Management, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SK4054S5-42

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sk4054s5-42.step / sk4054s5-42.glb are 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, 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