| Topology | Buck-Boost Converter |
| Input voltage | 7.5-36 V |
| Output 1 | 4.45 V / 2 A |
| IC revision | 3 |
Demonstration circuit 2558A is a high voltage switchingbuck regulator, Li-Ion cell charger and power backupmanager. It is based on the LTC4091 and provides the followingfunctions: 2A buck regulator with 7.5V-36V (60Vabsolute max) input range and with output voltage trackingcell voltage, full-featured cell charger with selectable4.1V or 4.2V maximum charge voltage, and a power path manager for the cell. Output voltage is strictly limited to4.45V. Temperature protection is optional with an externalNTC temperature sensor.