LM3691TL-1.8 Evaluation Board


Order now


The LM3691 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd batteries. It provides up to 1A load current, over an input voltage range from 2.3V to 5.5V. There are several different fixed voltage output options available.

The LM3691 evaluation board is a working demonstration of a step down DC-DC converter. This application note contains information about the evaluation board. For further information on buck converter topology, device electrical characteristics, and component selection, please refer to the datasheet.

  • VOUT = 0.75V to 1.8V
  • ± 1% DC output voltage precision
  • 2.3 ≤ VIN ≤ 5.5V
  • 4 MHz switching frequency
  • 64 µ A (typ.) quiescent current in ECO mode
  • 1A maximum load capability
  • Automatic ECO/PWM mode switching
  • Mode Pin to select ECO/Forced PWM mode
  • 1 µ H inductor, 4.7 µ F input capacitor (0603(1608) case size) and 4.7 µ F output capacitor (0603(1608) case size)
  • Current overload and thermal shutdown protections
  • Only three tiny surface-mount external components required (solution size less than 15 mm2)


  • Mobile Phones
  • Hand-Held Radios
  • MP3 players
  • Portable Hard Disk Drives


Buck converters (integrated switch)
LM3691 High Accuracy, Miniature 1A, Step-Down DC-DC Converter for Portable Applications

Order & start development

Evaluation board

LM3691TL-1.8EV/NOPB — LM3691TL-1.8 Evaluation Board

Not available on TI.com
TI's Standard Terms and Conditions for Evaluation Items apply.

Technical documentation

= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 4
Type Title Date
* EVM User's guide AN-1772 LM3691 Evaluation Board (Rev. B) Apr. 30, 2013
Certificate LM3691TL-1.8EV/NOPB EU Declaration of Conformity (DoC) Jan. 02, 2019
Certificate LM3691TL-1.8EV/NO EU Declaration of Conformity (DoC) Jan. 02, 2019
Data sheet LM3691 High-Accuracy, Miniature 1-A Step-Down DC-DC Converter for Portable Applications datasheet (Rev. J) Dec. 17, 2015

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

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. ​​​​​​​​