Hello everyone,

Yesterday I decided on the LTC4002ES8-4.2 as the battery charger IC. It has all of the features I was looking for in a charger IC:

• 2A charging current
• Hand-solderable
• Switching regulator
• Fairly integrated (for a switching regulator)
• Single cell charging
• (Bonus) Charge indicator output

As well, the main voltage regulator was chosen as the TPS61030. I was considering going with the TPS61032 which maxes out at 5V, but the TPS61030 (max 5.5V) allows me to set the voltage a bit above 5V to have a bit more ripple while staying above 5V. The voltage for the TPS61032 droops at higher currents as well. Based on the efficiency graph of the TPS61032 in the datasheet (no data for TPS61030), I'm expecting to get around 95% efficiency with the boost circuit while not powering external devices. I didn't spend too much time looking for other options: the regulator met my requirements and anything else would be for cost savings.

Thanks,

Stephen