BQ25504RGTR in TI BQ24xxx / BQ25xxx Battery Charge Family
The BQ25504RGTR family from Texas Instruments consists of highly efficient, ultra-low-power boost converters specifically designed for energy harvesting applications. These devices are engineered to extract microwatts to milliwatts of power from high-impedance sources like solar, thermal, or vibration harvesters. They feature a unique cold-start circuit that allows the system to begin operation from an input voltage as low as 330mV, subsequently managing the charging of batteries or supercapacitors with integrated overvoltage and undervoltage protection.
Variants in This Sub-Family
The BQ25504 series primarily varies by packaging and quantity, with the RGTR and RGTT suffixes denoting large versus small reel formats. While the core architecture remains consistent, some variants in the broader BQ255xx family, such as the BQ25570, integrate a buck converter to provide a regulated output rail, whereas the BQ25504 focuses strictly on energy extraction and storage management to minimize power overhead.
