AEM10941 
Solar Energy Harvester

Ultra-low-power start-up:

• Cold start from 380 mV input voltage and 3 μW input power (typical)

Ultra-low-power boost regulator:

• Open-circuit voltage sensing for MPPT every 5 s
• Configurable MPPT with 2-pin programming
• Selectable Voc ratios of 70, 75, 85 or 90%
• Input voltage operation range from 50 mV to 5 V
• MPPT voltage operation range from 50 mV to 5 V

Integrated 1.2/1.8 V LDO regulator:

• Up to 20 mA load current
• Power gated dynamically by external control
• Selectable output voltage

Integrated 1.8 V-4.1 V LDO regulator:

• Up to 80 mA load current with 300 mV drop-out
• Power gated dynamically by external control
• Selectable or adjustable output voltage

Flexible energy storage management:

• Selectable overcharge and overdischarge protection
• For any type of rechargeable battery or (super)capacitor
• Fast supercapacitor charging
• Warns the load when the battery is running low
• Warns when output voltage regulators are available

Smallest footprint, smallest BOM:

• Only seven passive external components

Optional primary battery:

• Automatically switches to the primary the battery when the secondary battery is exhausted

Integrated balun for dual-cell supercapacitor