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IP5306_4.35V

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INJOINIC Battery Management ICs, SOP-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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IP5306_4.35V

INJOINIC · Battery Management ICs · SOP-8-EP

IP5306_4.35V from INJOINIC, in a SOP-8-EP. 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 VIN power_in Charger 5V input pin, with input voltage specified at 4.75 V minimum, 5 V typical and 5.5 V maximum.
2 LED1 output Battery indicator pin1 for the state-of-charge LED display, with LED indicator current stated as 4 mA.
3 LED2 output Battery indicator pin2 for the state-of-charge LED display, with LED indicator current stated as 4 mA.
4 LED3 output Battery indicator pin3 for the state-of-charge LED display, with LED indicator current stated as 4 mA.
5 KEY input ON/OFF key input that is multiplexed as the torch lighting driver; a short push (30 ms to 2 s) opens the SOC LEDs and step-up converter.
6 BAT input Battery voltage sense pin, with battery operation voltage specified at 3.0 V minimum and 4.4 V maximum.
7 SW passive DCDC switch node that connects the inductor, used with a 1uH inductor in the stated test conditions.
8 VOUT power_out DCDC 5V output pin, with DC-DC output voltage specified at 5.10 V for VBAT=3.7V.
9 PowerPAD passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer INJOINIC
Package SOP-8-EP
Category Power Management ICs
Pins 9

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Port input voltage range VIN -0.3 5.5 V 4
Operating free-air temperature range TA 0 70 ℃ 4
Junction temperature TJ -40 150 ℃ 4
Storage temperature Tstg -60 150 ℃ 4
Human-body model (HBM) ESD ESD 4 KV Human-body model (HBM) 4
Thermal resistance (junction to ambient air) θJA 40 ℃/W 4
Input voltage VIN 4.75 5 5.5 V 4
Load current I 0 2.1 2.6 A 4
Operating ambient temperature TA 0 70 ℃ 4
Input voltage VIN 4.75 5 5.5 V Charger system 5
Input current (charging) IVIN 2 mA VIN=5V，fs=500KHz 5
Input current (standby) 100 uA VIN=5V，Device not switching 5
Trickle charge current ITRKL 100 mA VIN=5v，BAT=2.7v 5
Battery operation voltage VBAT 3 4.4 V Boost system 5
Battery operation current IBAT 3 mA VBAT=3.7V ， VOUT=5.1V ， fs=5000KHz 5
Battery operation current (device not switching) IBAT 100 uA VIN=5V，Device not switching 5
Output voltage ripple ΔVOUT 50 100 150 mV VBAT=3.7V ， VOUT=5.0V ， fs=500KHz 5
Load short-circuit detect timer TOCD 150 200 us Output current continuously larger than 3.5A 5
Target charge voltage VTRGT 4.2 V Charger system 5
Charge current ICHRG 2.1 A Charger system 5
Trickle charge stop voltage VTRKL 2.9 V Charger system 5
Recharge threshold VRCH 4.1 V Charger system 5
Charger safety timer TEND 24 Hour Charger system 5
Input under-voltage protection VUVLO 4.5 V Rising voltage 5
Input under-voltage protection hysteresis VUVLO 200 mV 5
DC-DC output voltage VOUT 5.1 V VBAT=3.7V 5
Boost output current Ivout 2.1 A 5
Load over-current detect timer TUVD 30 ms Output voltage continuously lower than 4.4V 5
Switching frequency 500 KHz Switching frequency 5
PMOS on resistance rDSON 35 mΩ 5
NMOS on resistance rDSON 30 mΩ 5
Battery standby current ISTB 50 uA VIN=0V，VBAT=3.7V 6
LED lighting current Ilight 25 mA 6
LED indicator current IL1 4 mA IL1, IL2, IL3 6
Load removal detect timer TloadD 32 s Load current continuously lower than 45mA 6
Push-button wake-up timer TOnDebounce 50 ms 6
Push-button light-on timer TKeylight 2 s 6
Thermal shutdown TOTP 125 ℃ Rising temperature 6
Thermal shutdown hysteresis ΔTOTP 40 ℃ 6

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
housing abs Human-body model (HBM) ESD 4 KV * Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. 4

CAD (KiCad official)

  • Symbol: IP5306_4.35V
  • Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm
  • 3D model: SOP-8-EP (KiCad packages3D, STEP)
  • 3D model files: ip5306-4-35v-etched.step / ip5306-4-35v-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ip5306-4-35v.step / ip5306-4-35v.glb are the bare package body.

Provenance

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

  • Datasheet: INJOINIC datasheet (11 pp, sha256 76818e77bf2002bf, retrieved 2026-10-28, 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