应用笔记 947

Extend Battery Life with Dual Power Supply for Wallcube/Battery-Powered Systems

By: Budge Ing

摘要 : To save battery life, a dual-output power supply draws battery power only when the AC wallcube source is not present. Featuring the MAX1705 step-up DC-DC converter and either the MAX1524 boost controller or MAX608 step-up DC-DC controller, this dual-output power supply needs no extra diodes or MOSFETs to automatically switch input sources and maintain 5V and 3.3V outputs.