component

FM5324HJ1

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by Ray

Shenzhen Fuman Battery Management, ESOP-8L. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

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FM5324HJ1

Shenzhen Fuman · Battery Management · ESOP-8L

FM5324HJ1 from Shenzhen Fuman, in a ESOP-8L. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VIN power_in Power input pin. Connects to 5V USB input (recommended 4.7-5.5V, absolute max 6V) for charging the lithium battery. UVLO rising threshold ~4.2V, falling ~3.5V. Input over-voltage protection triggers at ~6.0V.
2 LED1/L1 output LED indicator output 1. Drives battery capacity indication LED D1. Configurable for 1-4 LED display modes.
3 LED2/L2 output LED indicator output 2. Drives battery capacity indication LED D2. Used in 2/3/4-LED display configurations.
4 LED3/L3 output LED indicator output 3. Drives battery capacity indication LED D3. Used in 3/4-LED display configurations.
5 TAPW input Pushbutton input pin. Short-press activates boost output (S1 button); also used with external resistor divider (e.g. RKEY1 10k / RKEY2 100R) to select key mode / configuration.
6 BAT power_out Battery positive terminal sense/connection pin. Connects to lithium battery cell (charging output during charge, boost input during discharge). Full-charge regulation voltage typ 4.20V (programmable 4.20-4.40V). Discharge UVLO ~2.90V.
7 SW output Inductor drive pin / power MOSFET drain. Connects to external inductor (typ 1.0uH) for synchronous switching charging and boost operation at 500kHz. High-side PMOS Ron typ 35mΩ, low-side NMOS Ron typ 35mΩ.
8 OUT power_out Chip output pin / power PMOS source. Provides 5V boost output (typ 5.10V no-load) to USB output port with up to 2.4A capability. Over-current protection at ~3.0A, short-circuit protection built-in. Requires ~22uF x 2 output capacitors.
EP PGND power_in Chip power ground / exposed pad, also serves as the low-side NMOS source. Must be connected to system ground with a thermal PCB pad for heat dissipation.

Key specifications

Parameter Value
Manufacturer Shenzhen Fuman
Package ESOP-8L
Category PMIC
Pins 9

CAD (KiCad official)

  • Symbol: FM5324HJ1
  • Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm
  • 3D model: ESOP-8L (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Shenzhen Fuman datasheet (14 pp, sha256 89c5230f486c8333, retrieved 2026-08-17, 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: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF