The LMR33640 SIMPLE SWITCHER regulator is an easy-to-use, synchronous, step-down DC/DC converter that delivers best-in-class efficiency for rugged industrial applications. The LMR33640 drives up to 4 A of load current from an input of up to 36 V. The LMR33640 provides high light-load efficiency and output accuracy. Features such as a power-good flag and precision enable provide both flexible and easy-to-use solutions for a wide range of applications. The LMR33640 automatically folds back frequency at light load to improve efficiency. Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limit, and hiccup short-circuit protection. Integration and internal compensation eliminates many external components and provides a pinout designed for a simple PCB layout. The feature set of the device is designed to simplify implementation for a wide range of end equipment. The LMR33640 is pin-to-pin compatible with the LMR33610, LMR33620, LMR33630 (36 V, 1 A/2, A/3 A), LMR36510 (65 V, 1 A), and LMR36520 (65 V, 2 A), completing the family of scalable SIMPLE SWITCHER power supplies. This minimizes the cost and effort associated with board layout modifications. The LMR33640 is available in an 8-pin HSOIC package.
| Type | Title | Date | |
|---|---|---|---|
| * | Data sheet | LMR33640 SIMPLE SWITCHER 3.8-V to 36-V, 4-A Synchronous Step-down Converter datasheet (Rev. C) | 24 Nov 2020 |
| Functional safety information | LMR336x0 Functional Safety, FIT Rate, FMD and Pin FMA (Rev. A) | 02 Mar 2021 | |
| Application note | Working with Inverting Buck-Boost Converters (Rev. A) | 14 May 2020 | |
| Technical article | 3 tips when designing a power stage for servo and AC drives | 20 Nov 2019 | |
| User guide | LMR33640EVM User's Guide | 01 Nov 2019 | |
| Technical article | Minimize the impact of the MLCC shortage on your power application | 29 Mar 2019 | |
| Technical article | How to increase system reliability and simplify design using DC/DC converters | 13 Jun 2016 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | Download |
|---|---|---|
| SO PowerPAD (DDA) | 8 | View options |
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