SLVAFH3 December 2022 TPS6213013A-Q1 , TPS62130A-Q1 , TPS62133A-Q1 , TPS62150A-Q1 , TPS62152A-Q1 , TPS62153A-Q1 , TPS62901-Q1 , TPS62902-Q1 , TPS62903-Q1 , TPS62992-Q1 , TPS62993-Q1
The technology that drives buck converters is continuously being innovated to provide the best possible system performance. Power is at the heart of every electrical system, so improvements in size, efficiency, and thermal characteristics are beneficial to all applications. The TPS6290x-Q1 family is the next generation of 18V, low Iq, high efficiency, buck converters that improved upon the previous family TPS621x0A-Q1. The new generation also includes the TPS6299x-Q1 set of devices that feature a lower maximum input voltage of 10V. Table 1-1 shows the key features of each product and the improvements on the latest generation family. But what does improved really mean? To understand how technology has improved, this application report provides a comparison of the previous version to the new version, as well as an explanation of how the changes benefit the user more than the previous version.
| Features | TPS621x0A-Q1 | TPS6290x-Q1 | TPS6299x-Q1 | Improvements |
|---|---|---|---|---|
| VIN | 3 V to 17 V | 3 V to 18 V | 3 V to 10 V | |
| VOUT | 0.9 V to 6 V | 0.4 V to 5.5 V | Supports lower Vout down to 0.4 V(1) | |
| FB accuracy (over temperature range) | 1.8% | 1.25% | 31% tighter Vref accuracy | |
| Typical quiescent current (device not switching) | 17uA | 4uA | Better light load efficiency | |
| Package size | 3.0mmx3.0mm QFN | 2.2mmx2.0mm QFN | 51% smaller package | |
| Smart configuration | No | Yes | Fewer external components needed to configure device | |
| Junction Temperature | -40C to 125C | -40C to 165C | Supports higher Tj up to 165C | |
| Switching Performance | 2.5 MHz and 1.25 MHz | 2.5 MHz and 1.0 MHz | Wider range in frequency selection | |
| RDS(ON) | 90m?/40m? | 62m?/22m? | Less power loss | |
| Efficiency (12Vin, 1.2Vo, 2.2uH, 3 A)(2) | 78.9% (1.25 MHz) | 83.0% (1MHz) | N/A | Improved efficiency |
| Efficiency (6Vin, 1.2Vo, 2.2uH, 3A)(2) | 80.4% (1.25 MHz) | 84.6% (1 MHz) | ||
| Automatic Efficiency Enhancement | No | Yes | High efficiency for varying duty cycles | |
| Output discharge | Using PG | Using VOS | Achieved internally when selected | |
| Selectable VOUT (VSET and internal voltage divider) | No | Yes | This allows for internal divider that has lower BOM count and better overall system accuracy | |
| Wettable flanks | No | Yes | Enables visual inspection of solder joints (AVI) | |