Calculation tool
LM34936-BUCK-BOOST-QUICKSTART-TOOL — LM34936 Buck-Boost Quickstart Tool
The LM34936 Buck-Boost Quickstart Tool support to configure the power stage and the external components for the LM34936.
Data sheet
LM34936
- Single inductor buck-boost controller for step-up/step-down DC/DC conversion
- Wide VIN: 4.2 V (2.5 V with bias) to 30 V (42-V maximum)
- Flexible VOUT: 0.8 V to 30 V
- VOUT short protection
- High efficiency buck-boost transition
- Adjustable switching frequency
- Optional frequency sync and dithering
- Integrated 2-A MOSFET gate drivers
- Cycle-by-cycle current limit and optional hiccup
- Optional input or output average current limiting
- Programmable lnput UVLO and soft start
- Power good and output overvoltage protection
- Available in QFN-28 package
- Create a custom design using the LM34936 with the WEBENCH Power Designer
The LM34936 is a synchronous four-switch buck-boost DC/DC controller capable of regulating the output voltage at, above, or below the input voltage. The LM34936 operates over a wide input voltage range of 4.2 V to 30 V (42-V absolute maximum) to support a variety of applications.
The LM34936 employs current-mode control both in buck and boost modes of operation for superior load and line regulation. The switching frequency is programmed by an external resistor and can be synchronized to an external clock signal.
The device also features a programmable soft-start function and offers protection features including cycle-by-cycle current limiting, input undervoltage lockout (UVLO), output overvoltage protection (OVP), and thermal shutdown. In addition, the LM34936 features optional average input or output current limiting, optional spread spectrum to reduce peak EMI, and optional hiccup mode protection in sustained overload conditions.
Technical documentation
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View all 6 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM34936 30-V Wide VIN Synchronous 4-Switch Buck-Boost Controller datasheet (Rev. A) | PDF | HTML | 13 Aug 2021 |
| Certificate | LM34936EVM EU Declaration of Conformity (DoC) | 14 Nov 2023 | ||
| Technical article | Adjusting VOUT in USB Type-C™ and wireless charging applications, part 2 | PDF | HTML | 18 Feb 2020 | |
| Technical article | Adjusting VOUT in USB Type-C™ and wireless charging applications, part 1 | PDF | HTML | 10 Feb 2020 | |
| Technical article | Four-switch buck-boost layout tip No. 4: routing gate-drive and return paths | PDF | HTML | 20 Feb 2019 | |
| EVM User's guide | LM34936EVM User Guide | 22 Aug 2018 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
LM34936EVM — LM34936 Evaluation Module
The LM34936EVM features a four switch buck-boost converter based on TI’s LM34936 Wide VIN buck-boost controller. This converter is designed to operate from input voltage from 6V to 30V and provide a 12V regulated output with a load current of up to 6 A.
User guide: PDF
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN (RHF) | 28 | Ultra Librarian |
Ordering & quality
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