The LM2735-Q1 device is an easy-to-use, space-efficient 2.1-A low-side switch regulator, ideal for boost and SEPIC DC/DC regulation. The device provides all the active functions to provide local DC-DC conversion with fast-transient response and accurate regulation in the smallest PCB area. Switching frequency is internally set to either 520 kHz or 1.6 MHz, allowing the use of extremely small surface mount inductor and chip capacitors, while providing efficiencies of up to 90%. The device can be used as a post-boost, boosting from the main automotive system 3.3V rail to power CAN transceivers and other circuits requiring 5V. The 24V output capability allows the LM2735-Q1 to power audio amplifiers, antenna, power-over-coax (PoC), and automotive audio bus (A2B) devices as well.
Current-mode control and internal compensation provide ease-of-use, minimal component count, and high-performance regulation over a wide range of operating conditions. External shutdown features an ultra-low standby current of 80 nA, ideal for portable applications. Tiny SOT-23 and WSON packages provide space savings. Additional features include internal soft start, circuitry to reduce inrush current, pulse-by-pulse current limit, and thermal shutdown.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM2735-Q1 520-kHz and 1.6-MHz Space-Efficient Boost and SEPIC DC/DC Regulator datasheet | PDF | HTML | 12 Sep 2018 |
| EVM User's guide | AN-1668 LM2735Y 8-Pin eMSOP Demo Board (Rev. B) | 25 Apr 2013 | ||
| EVM User's guide | AN-1660 LM2735Y 6-Pin LLP Demo Board (Rev. A) | 24 Apr 2013 | ||
| EVM User's guide | AN-1664 LM2735X 5-Pin SOT23 Demo Board (Rev. B) | 24 Apr 2013 | ||
| EVM User's guide | AN-1665 LM2735Y 5-Pin SOT23 Demo Board (Rev. B) | 24 Apr 2013 | ||
| EVM User's guide | AN-1666 LM2735X 6-Pin LLP Demo Board (Rev. A) | 24 Apr 2013 | ||
| EVM User's guide | AN-1667 LM2735X 8-Pin eMSOP Demo Board (Rev. A) | 24 Apr 2013 | ||
| Application note | AN-1658 LM2735 BOOST and SEPIC DC-DC Regulator (Rev. A) | 23 Apr 2013 | ||
| User guide | High Efficiency Portable Media Player (PMP) Dock Station User Guide | 27 Jan 2012 |
For additional terms or required resources, click any title below to view the detail page where available.
The demo board included in this shipment uses the LM2735X 1.6MHz DC-DC switching regulator that converts 3V to 5.5V input to 12V output for up to 500mA load current depending on Vin. This is a 2-layer board using the bottom layer as a Ground plane.
The demo board included in this shipment converts 3V to 5.5V input to 12V output for up to 500mA load current using the LM2735Y 520kHz DC-DC switching converter in the 8-Pin eMSOP package. This is a 2-layer board using the bottom layer as a Ground plane.
The demo board included in this shipment converts 3V to 5.5V input to 12V output for up to 500mA load current using the LM2735X 1.6MHz DC-DC switching converter. This is a 2-layer board using the bottom layer as a ground plane.
The demo board included in this shipment converts 3V to 5.5V input to 12V output for up to 500mA load current using the LM2735Y 520kHz DC-DC switching converter. This is a 2-layer board using the bottom layer as a ground plane.
This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOT-23 (DBV) | 5 | Ultra Librarian |
| WSON (NGG) | 6 | Ultra Librarian |
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