This is a backup power reference design for automotive eCall application. It uses one cell LiFePO4 as the backup battery. The minimum backup battery voltage can be down to 2 V with boost converter TPS61088-Q1. The boost converter TPS61088-Q1 can output 8 V/1.6A at 2 V input voltage. The value this has over the integrated solution competition is much better efficiency and less redundancy when boosting from the back-up battery.

• Wide input voltage range: 3.8 – 36 V
• 8 V/1.6A output power capability when backup battery voltage drop to 2 V
• Longer Battery Lifetime
• Low cost
• Simple and flexible