# FM5324GA

**Shenzhen Fuman** · Battery Management ICs · ESOP-8

FM5324GA from Shenzhen Fuman, in a ESOP-8. 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 | Power input pin; recommended input voltage 4.5~5.5V, absolute maximum -0.3~6V, input OVP at 6.0V. |
| 2 | L1 | output | LED battery-level indicator pin (L1-L3 group), output current 4/5/6 mA (min/typ/max). |
| 3 | L2 | output | LED battery-level indicator pin (L1-L3 group), output current 4/5/6 mA (min/typ/max). |
| 4 | L3 | output | LED battery-level indicator pin (L1-L3 group), output current 4/5/6 mA (min/typ/max). |
| 5 | TAPW | bidirectional | Key (button) pin that also controls the flashlight (WLED); with RKEY1=10kΩ short press starts boost, long press toggles flashlight, flashlight drive 22 mA at VBAT=4.0V. |
| 6 | BAT | power_out | Battery positive sense pin that supplies about 100 mA trickle charge current to the battery. |
| 7 | SW | passive | Inductor drive pin, power switch drain; recommended inductor 1.5uH. |
| 8 | OUT | power_out | Chip output pin, source of the power P-MOS; boost output of 5V with overcurrent protection at 3.0A typ. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen Fuman |
| Package | ESOP-8 |
| Category | Power Supply Chip |
| 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 |
|---|---|---|---|---|---|---|---|
| Input voltage (absolute max) | VIN | -0.3 |  | 6 | V |  | 3 |
| Operating temperature range | TOP | -40 |  | 85 | ℃ |  | 3 |
| Operating junction temperature range | TJ | -20 |  | 150 | ℃ |  | 3 |
| Storage temperature | TST | -55 |  | 150 | ℃ |  | 3 |
| Lead soldering temperature | TLEAD |  |  | 300 | ℃ | 10 sec | 3 |
| Recommended input voltage | VIN | 4.5 |  | 5.5 | V |  | 3 |
| Recommended operating ambient temperature | TOP | 0 |  | 50 | ℃ |  | 3 |
| Standby current | IQ |  | 55 | 75 | uA | VBAT =4.2V | 4 |
| Float threshold voltage | VBAT-REG | 4.16 | 4.2 | 4.24 | V |  | 4 |
| Output overload protection time | TOCP-OFF | 12 | 14 | 16 | mS |  | 6 |
| Output short-circuit current detection time | TLOAD-STP | 56 | 60 | 64 | uS |  | 6 |
| LED port output current | ILED | 4 | 5 | 6 | mA | L1-L3 | 8 |
| LED flash frequency when charging | FLED-CHG | 0.9 | 1 | 1.1 | Hz | 单灯闪烁方式 | 8 |
| LED flash frequency, low battery | FLED-LOWB | 1.8 | 2 | 2.2 | Hz |  | 8 |
| Manual key short-press time | TTAPSHORT | 24 | 28 | 32 | mS |  | 9 |
| Manual key long-press time | TTAPLONG | 1.5 | 1.75 | 2 | S |  | 9 |
| Input reverse blocking switch Rdson | RON-IRB |  | 75 |  | mΩ |  | 4 |
| Top switch Rdson | RON-TS |  | 35 |  | mΩ |  | 4 |
| Bottom switch Rdson | RON-BS |  | 35 |  | mΩ |  | 4 |
| Operating current, charging | ICC-CHG |  | 4 |  | mA | VIN =5V 充电状态 | 4 |
| Undervoltage threshold rising | VUVLO-RS |  | 4.2 |  | V | VIN从低到高 | 4 |
| Undervoltage threshold falling | VUVLO-DN |  | 3.5 |  | V | VIN从高到低 | 4 |
| Trickle to constant-current threshold | VTRKL |  | 3 |  | V | VBAT 从低到高 | 4 |
| Charge termination current | IFULL |  | 300 |  | mA | VIN=5.0V | 4 |
| Recharge threshold rising | VRECHG |  | 4.05 |  | V | VBAT rising | 4 |
| Recharge threshold falling | VRECHG |  | 4 |  | V | VBAT falling | 4 |
| Input constant-current charge current | IVIN-CHG |  | 2 |  | A | VIN=5.0V | 5 |
| Trickle charge current | ITRKL |  | 270 |  | mA | VBAT=2.8V | 5 |
| Input overvoltage protection voltage | VIN-OVP |  | 6 |  | V | 输入电压升高 | 5 |
| Operating current, boost | ICC-BST |  | 3.8 |  | mA | 放电状态： VBAT=4.2V ，ILOAD=0，指示灯熄灭 | 6 |
| No-load output voltage | VOUT-NL |  | 5.1 |  | V | IOUT=0 | 6 |
| Output overcurrent protection current | ILOAD-OCP |  | 3 |  | A |  | 6 |
| Oscillator frequency | fOSC |  | 1000 |  | KHz |  | 6 |
| Switching frequency | fSW |  | 500 |  | KHz |  | 6 |
| Shutdown voltage on discharge | VBAT-UVLO |  | 2.9 |  | V |  | 6 |
| Chip temperature limit protection | TEMPOTL |  | 95 |  | ℃ |  | 6 |
| Chip over-temperature protection | TEMPOTP |  | 135 |  | ℃ |  | 6 |

## CAD (KiCad official)

- Symbol: `FM5324GA`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`
- 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files: `fm5324ga-etched.step` / `fm5324ga-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fm5324ga.step` / `fm5324ga.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shenzhen Fuman datasheet](docs/fm5324ga-datasheet.pdf) (12 pp, sha256 `b7f07d15895812b5`, retrieved 2026-10-22, 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-sonnet-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/fm5324ga-datasheet.pdf)