The MAX8819_ is a complete power solution for MP3 players and other handheld applications. It includes a battery charger, step-down converters, and WLED power.
The MAX8819 family provides a complete power solution for handheld applications such as MP3 players, portable GPS devices, digital cameras and cellular phones. It integrates a USB/AC‑adapter charger, three 2 MHz step‑down converters, a step‑up LED driver and a Smart Power Selector that automatically switches between battery and external power.
The device is offered in a 28‑pin thin‑QFN (TQFN‑EP) package and supports selectable input‑current limits of 100 mA, 500 mA or 1 A, on‑chip thermal limiting, and programmable charge current. Detailed electrical characteristics, typical application circuits and PCB layout guidelines are provided.
| Operating Voltage Range (Vsys) | 2.6 V – 5.5 V |
|---|---|
| Input Current‑Limit Options | 100 mA, 500 mA, 1 A |
| Maximum Step‑Down Converter Output Current (MAX8819C/D) | 550 mA |
| Thermal Shutdown Temperature | +165 °C |
The device allows the input current limit to be set to 100 mA, 500 mA, or 1 A.
Thermal shutdown occurs when the junction temperature rises above +165 °C.