All trademarks are the property of their respective owners.
The LM2651 switching regulator provides high-efficiency power conversion over a 100:1 load range (1.5 A to 15 mA). This feature makes the LM2651 an ideal fit in battery-powered applications that demand long battery life in both run and standby modes.
Synchronous rectification is used to achieve up to 97% efficiency. At light loads, the LM2651 enters a low power hysteretic or sleep mode to maintain high efficiency. In many applications, the efficiency still exceeds 80% at 15-mA load. A shutdown pin is available to disable the LM2651 and reduce the supply current to less than 10 µA.
The LM2651 contains a patented current sensing circuitry for current mode control. This feature eliminates the external current sensing resistor required by other current-mode DC-DC converters.
The LM2651 has a 300-kHz fixed frequency internal oscillator. The high oscillator frequency allows the use of extremely small, low-profile components.
A programmable soft-start feature limits current surges from the input power supply at start-up and provides a simple means of sequencing multiple power supplies.
Other protection features include input undervoltage lockout, current limiting, and thermal shutdown.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM2651 1.5 A High-Efficiency Synchronous Switching Regulator datasheet (Rev. E) | PDF | HTML | 03 Nov 2015 |
| User guide | LM2651 Step-Down Converter Evaluation Module User's Guide (Rev. D) | PDF | HTML | 11 Jan 2022 | |
| Selection guide | Buck Converter Quick Reference Guide (Rev. B) | 08 Apr 2021 | ||
| User guide | LM2651 EVAL 1.5A High Efficiency Synch Switching Reg Eval Board (Rev. A) | 24 Apr 2013 |
For additional terms or required resources, click any title below to view the detail page where available.
1.5A High Efficiency Switching Regulator
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| TSSOP (PW) | 16 | 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.