# BRCL4054DME

**Foshan Blue Rocket Elec** · Battery Management ICs · SOT-23-5

BRCL4054DME from Foshan Blue Rocket Elec, 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 indicator that outputs logic low while charging and high impedance when the charge cycle is terminated (absolute max -0.3 to 8 V). |
| 2 | GND | power_in | Chip ground. |
| 3 | BAT | bidirectional | Battery connection that sources charge current and regulates to a 4.20V float voltage (±1%), with a drain current below 3µA in sleep mode (absolute max -0.3 to 7 V). |
| 4 | VDD | power_in | External DC 5V input supply with a 4 to 6 V operating range (absolute max -0.3 to 8 V). |
| 5 | PROG | passive | Charge current programming pin where a resistor to ground sets the charge current (absolute max -0.3 to 8 V). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Foshan Blue Rocket Elec |
| Package | SOT-23-5 |
| Category | Power Supply Chip |
| 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 |
|---|---|---|---|---|---|---|---|
| VDD to GND | VDD | -0.3 |  | 8 | V |  | 3 |
| BAT to GND | VBAT | -0.3 |  | 7 | V |  | 3 |
| CHRG to GND | Vchrg | -0.3 |  | 8 | V |  | 3 |
| PROG to GND | Vprog | -0.3 |  | 8 | V |  | 3 |
| Storage Temperature | TSTG | -50 |  | 125 | ℃ |  | 3 |
| Operating Temperature Range | Topr | -40 |  | 85 | ℃ |  | 3 |
| Lead Temperature (Soldering, 10s) | Tsolder |  |  | 260 | ℃ |  | 3 |
| Input voltage range | VDD | 4 | 5 | 6 | V |  | 3 |
| Float threshold voltage | VBAT | 4.158 | 4.2 | 4.242 | V | VDD=5V | 3 |
| BAT backflow current | IBAT | 0.5 |  | 5 | μA | Vcc=3.5V, Vbat=4.2V | 3 |
| VDD power-down detection (rising) |  |  | 100 |  | mV | VDD low to high, VDD>BAT | 3 |
| VDD power-down detection (falling) |  |  | 30 |  | mV | VDD high to low, VDD>BAT | 3 |
| Trickle to constant current threshold | VTRKL |  | 2.8 |  | V | VBAT rising | 3 |
| Trickle charge hysteresis | VTRHYS |  | 100 |  | mV |  | 3 |
| VDD undervoltage lockout threshold | VUV |  | 3.7 |  | V | VDD rising | 3 |
| VDD UVLO hysteresis | VUVHYS |  | 200 |  | mV |  | 3 |
| Manual shutdown threshold | Vmsd |  | 1.2 |  | V |  | 3 |
| Manual shutdown hysteresis | VmsdHYS |  | 50 |  | mV |  | 3 |
| PROG voltage in trickle charge | Vprog1 |  | 0.1 |  | V |  | 3 |
| PROG voltage at high current | Vprog2 |  | 1 |  | V |  | 3 |
| Over-temperature recovery | OTR |  | 130 |  | ℃ | VDD=5V | 3 |

## CAD (KiCad official)

- Symbol: `BRCL4054DME`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `brcl4054dme-etched.step` / `brcl4054dme-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `brcl4054dme.step` / `brcl4054dme.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Foshan Blue Rocket Elec datasheet](docs/brcl4054dme-datasheet.pdf) (8 pp, sha256 `8993c300927addd0`, retrieved 2026-10-26, 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/brcl4054dme-datasheet.pdf)