Tiny, ultra-low Iq DC-DC power supply with battery charging reference design for wearables
PMP21884
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Key Document
- Tiny, Ultra-Low Iq DC-DC Power Supply With Battery Charging Reference Design
(PDF 1533 KB)
22 Apr 2019
Description
A highly-integrated power supply reference design for smartwatches and fitness trackers enabling ultra-low Iq in an ultra-small (48sqmm) solution size. Supply includes seven power rails for the system including battery charger, LDO, DC-DC buck converters and integrated boost converter for heart rate monitor AFE LED drive supply or PMOLED bias.
Features
- Ultra-small (48mm2) total footprint power supply solution
- 400nA Iq linear battery charge management solution with fast charge, LDO, load switch, ADC and over-voltage/over-current protection
- Selectable, integrated boost rail for PMOLED display or heart-rate monitor LED driver
- Seven rails for various peripherals:
- 1.8V@1A
- 1.8V@0.3A
- 1.8V@0.1A
- 1.8V@0.1A
- 1.2V@0.2A
- 12V@0.06A, or
- 5V@ 0.150A
See the Important Notice and Disclaimer covering reference designs and other TI resources.