# AD4054

**IDCHIP** · Battery Management ICs · SOT-23-5

AD4054 from IDCHIP, 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 pulled low by an internal N-channel MOSFET during charging, with a weak ~20uA pull-down at end of charge and high impedance when undervoltage lockout is detected. |
| 2 | GND | power_in | Power ground. |
| 3 | BAT | power_out | Charge current output to the battery that regulates the final float voltage to 4.2V via a precision internal resistor divider, which is disconnected in shutdown mode. |
| 4 | VCC | power_in | Input supply of 4.25V-5.5V that should be bypassed with at least a 1uF capacitor, and the charger enters shutdown when VCC falls to within 30mV of the BAT voltage, reducing IBAT below 2uA. |
| 5 | PROG | bidirectional | Charge current program, charge current monitor and shutdown pin: a 1% resistor RPROG to ground sets the current, the pin is held at 1V in constant-current mode with IBAT=(VPROG/RPROG)*800, and a 1.22V shutdown threshold (2.5uA pull-up when RPROG is removed) puts the charger in shutdown with supply current of 45uA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | IDCHIP |
| Package | SOT-23-5 |
| Category | Power Management ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Input supply voltage | VCC | 4.3 | 5 | 5.5 | V |  | 4 |
| Float voltage | VFLOAT | 4.15 | 4.2 | 4.242 | V | 0℃≤TA≤85℃ | 4 |
| BAT pin current, current mode | IBAT | 100 | 110 | 120 | mA | RPROG=2.4K, current mode | 4 |
| BAT pin current, current mode | IBAT | 475 | 500 | 520 | mA | RPROG=1.2K, current mode | 4 |
| Trickle charge current | ITRIKL | 20 | 50 | 70 | mA | VBAT<VTRIKL, RPROG=1.2K | 4 |
| Trickle charge threshold voltage | VTRIKL | 2.8 | 2.9 | 3 | V | RPROG=1.2K, VBAT rising | 4 |
| Trickle charge hysteresis voltage | VTRHYS | 60 | 80 | 100 | mV | RPROG=1.2K | 4 |
| VCC undervoltage lockout threshold | VUV | 3.5 | 3.7 | 3.9 | V | VCC from low to high | 4 |
| VCC undervoltage lockout hysteresis | VUVHYS | 150 | 200 | 300 | mV |  | 4 |
| VCC-VBAT lockout threshold voltage | VASD | 60 | 100 | 140 | mV | VCC from low to high | 4 |
| VCC-VBAT lockout threshold voltage | VASD | 5 | 30 | 50 | mV | VCC from high to low | 4 |
| C/10 termination current threshold | ITERM | 60 | 70 | 80 | mA |  | 4 |
| C/10 termination current threshold | ITERM | 120 | 130 | 140 | mA |  | 4 |
| PROG pin voltage | VPROG | 0.9 | 1 | 1.1 | V | RPROG=1.2K, current mode | 4 |
| CHRG pin output low voltage | VCHRG | 0.1 | 0.35 | 0.6 | V | ICHRG=5mA | 4 |
| CHRG pin weak pull-down current | ICHRG | 7 | 12 | 20 | uA | VCHRG=5V | 4 |
| Recharge battery threshold voltage | ΔVRECHRG | 100 | 150 | 200 | mA | VFLOAT-VRECHRG | 4 |
| Recharge comparator filter time | tRECHARGE | 0.8 | 1.8 | 4 | ms | VBAT high to low | 4 |
| Termination comparator filter time | tTERM | 0.8 | 1.8 | 4 | ms | IBAT falls below ICHG/10 | 4 |
| Supply current, charge mode | ICC |  | 150 | 500 | µA | Charge mode, RPROG=1.2K | 4 |
| Junction temperature in thermal limiting | TLIM |  | 145 |  | ℃ |  | 4 |
| Power FET on resistance | RON |  | 500 |  | mΩ | between VCC and BAT | 4 |
| Soft-start time | tss |  | 20 |  | µs | IBAT=0, IBAT=1200v/RPROG | 4 |
| PROG pin pull-up current | IPROG |  | 2 |  | µA |  | 4 |
| Input supply voltage (abs max) | VCC | 4.2 |  | 5.5 | V | printed as 4.2~5.5V | 3 |
| PROG pin voltage (abs max) | PROG | -0.3 |  |  | V | -0.3 ~ VCC+0.3V | 3 |
| BAT pin voltage (abs max) | BAT | -0.3 |  | 5 | V |  | 3 |
| CHRG pin voltage (abs max) | CHRG | -0.3 |  | 5 | V |  | 3 |
| BAT pin current (abs max) |  |  |  | 600 | mA |  | 3 |
| PROG pin current (abs max) |  |  |  | 600 | uA |  | 3 |
| Maximum junction temperature |  |  |  | 145 | ℃ |  | 3 |
| Operating ambient temperature range |  | -40 |  | 85 | ℃ |  | 3 |
| Storage temperature range |  | -65 |  | 125 | ℃ |  | 3 |
| Lead temperature |  |  |  | 260 | ℃ | soldering 10 seconds | 3 |

## CAD (KiCad official)

- Symbol: `AD4054`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `ad4054-etched.step` / `ad4054-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ad4054.step` / `ad4054.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [IDCHIP datasheet](docs/ad4054-datasheet.pdf) (6 pp, sha256 `c28dca5e0529651b`, retrieved 2026-10-23, 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/ad4054-datasheet.pdf)