Additional features on the LTC4162 include a PowerPath topology that decouples the output voltage from the battery, thereby allowing a portable product to start up instantly when a charging source is applied under very low battery voltage conditions. Onboard charging profiles are optimized for each of a variety of battery chemistries, including Li-Ion/Polymer, LiFePO4, and lead acid. Using JEITA guidelines or custom settings, the device automatically adjusts both charge voltage and charge current based on battery temperature. The Analog Devices Inc. LTC4162 Step-Down Battery Chargers provides an exposed metal pad for excellent thermal performance. E- and I-grade devices are guaranteed for operation from –40°C to +125°C.