The TPS65261, TPS65261-1 is a monolithic triple synchronous step-down (buck) converter with 3-A/2-A/2-A output currents. A wide 4.5-V to 18-V input supply voltage range encompasses the most intermediate bus voltages operating off 5-V, 9-V, 12-V or 15-V power bus. The converter, with constant frequency peak current mode, is designed to simplify its application while giving designers options to optimize the system according to targeted applications. The switching frequency of the converters can be adjusted from 250 kHz to 2 MHz with an external resistor. The 180° out-of-phase operation between Buck1 and Buck2, 3 (Buck2 and 3 run in phase) minimizes the input filter requirements.
The TPS65261, TPS65261-1 features an automatic power sequence with connecting MODE pin to V7V and configuring EN1/2/3 pins. The device also features an open drain RESET signal to monitor power down.
At light load, the TPS65261 automatically operates in pulse skipping mode (PSM) and the TPS65261-1 operates in force continuous current mode (FCC). PSM mode provides high efficiency by reducing switching losses at light loads and FCC mode reduces noise susceptibility and RF interference.
The device features overvoltage protection, overcurrent and short-circuit protection and over-temperature protection. A power-good pin asserts when any output voltages are out of regulation.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TPS6526x 4.5-V to 18-V Input Voltage, 3-A/2-A/2-A Output Current Triple Synchronous Step-Down Converter datasheet (Rev. C) | PDF | HTML | 10 May 2023 |
| EVM User's guide | TPS65261 Buck Converter Evaluation Module User's Guide (Rev. A) | PDF | HTML | 26 May 2021 | |
| Application note | Measure Power Stage Gain and Slope Compensation in PCM (Peak Current Mode) BUCK (Rev. A) | PDF | HTML | 01 Apr 2019 | |
| Application note | TPS65250/1/2/3 LAYOUT GUIDE | 15 Jan 2013 |
For additional terms or required resources, click any title below to view the detail page where available.
The TPS65261EVM-650 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the TPS65261. The EVM contains input and output connectors as well as control jumpers to ease evaluation of device features.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RHB) | 32 | Ultra Librarian |
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.