Device Overview
BQ25570RGRT is the 20-pin RGR VQFN orderable of TI’s BQ25570 energy-harvesting PMIC. It combines an ultra-low-power boost charger with a nanopower buck stage so the source side, storage element, and regulated load rail can be managed in one device. The distinction between start-up and steady harvesting matters: TI specifies a 600 mV minimum cold-start condition, while continuous harvesting can continue from input levels as low as 100 mV after the converter has started.
Confirmed Technical and Ordering Data
| Parameter | Confirmed value | Scope / condition |
|---|---|---|
| Device Function | Ultra-low-power energy-harvesting PMIC with boost charger and nanopower buck converter | |
| Input Voltage | 0.6 to 5.1 V | parametric operating input range; TI also specifies cold start at VIN >= 600 mV and continuous harvesting from VIN as low as 100 mV after startup |
| Output Voltage Or Range | 2.2 to 5.5 V | battery charge voltage range; energy-storage overvoltage level is user programmable |
| Current Rating | 0.1 A | maximum charge-current parametric value; not the same as buck load current |
| Quiescent Current | 488 nA | typical full-operating quiescent current |
| Buck Peak Output Current | 110 mA | typical peak buck output current; application conditions and thermal limits apply |
| Control Interface | Standalone RC-settable with programmable MPPT | |
| Protection Features | Input OVP, battery undervoltage/overvoltage management, battery-good flag | |
| Package | VQFN-20 (RGR) | exact orderable/package form |
| Temperature Range | -40 to 125 °C | exact orderable or manufacturer family grade |
Engineering Selection Guidance
Treat the 0.1 A figure as the charger’s maximum charge-current parameter, not as the buck output rating. The buck stage is separately characterized for about 110 mA typical peak output current. For weak photovoltaic, thermoelectric, or other high-impedance sources, the programmable MPPT and input-voltage regulation functions are the relevant selection features because they help prevent the source from collapsing under load. Storage voltage is programmable in the 2.2 V to 5.5 V range, so the battery or supercapacitor limits must be set around the actual storage chemistry and system thresholds. The 488 nA typical operating quiescent current is especially relevant when harvested power is intermittent and system energy is measured in microwatts rather than watts.
Procurement Notes
Manufacturer lifecycle/status evidence for this exact orderable is recorded as ACTIVE. Package identity is VQFN-20 (RGR). TI lists RGRT with a 250-piece SMALL T&R manufacturer carrier (not HKEQGOO stock or MOQ), RoHS/REACH compliance, and MSL Level 1 at 260 °C. Confirm final availability, lot/date-code requirements, and commercial terms through the RFQ process.
Lifecycle status does not indicate HKEQGOO stock, lead time, MOQ, or final availability.
Functionally Related Energy-Harvesting PMICs
The following are functional comparison candidates, not drop-in replacements; electrical architecture, pinout, package, and storage/load power-path requirements differ.
- BQ25505RGRT — energy-harvesting boost charger with autonomous battery power multiplexing; it does not provide the BQ25570 integrated buck output.
- BQ25504RGTT — energy-harvesting boost charger with battery management in a different 16-pin RGT package; no integrated buck output and different temperature/voltage limits.
Keep BQ25570RGRT for a design that requires the integrated nanopower buck stage; any redesign using these devices needs a circuit and PCB review.
