MAX1551/MAX1555 is a single-cell Li+ battery charger with USB and AC adapter dual inputs. The charger can be charged using USB or AC adapter and automatically switches when the AC adapter is inserted. It features an on-chip temperature limiting circuit, charging status indicator, and 5-pin thin SOT23 package.
The Maxim MAX1551 and MAX1555 are thin‑SOT23‑5 charge management ICs that accept either a USB or an AC adapter as input and provide regulated charging for Li‑ion batteries. The document lists absolute maximum ratings, electrical characteristics, pin functions and typical performance curves.
Key features include a wide input voltage range, low‑dropout regulation, status indicators (POK and CHG) and protection against over‑temperature and over‑current conditions. This manual is written in Chinese.
| Operating Temperature Range | -40 °C to +85 °C |
|---|---|
| DC Input Voltage Range | 0 V to +8 V |
| USB Input Current (max) | 100 mA |
| DC Input Current (typ) | 280 mA |
| Supply Current (DC) | 3 mA |
The devices are rated for operation from –40 °C up to +85 °C.
The absolute maximum rating for the DC input is 0 V to +8 V.
The USB input can draw up to 100 mA for charging.
A typical DC adapter provides about 280 mA of charging current.