The LMR664x0-Q1 is a small 36-V, 3-A (available in 2-A and 1-A variants) synchronous step-down DC/DC converter in an enhanced HotRod QFN package. This easy-to-use converter supports a wide input voltage range of 2.7 V to 36 V (after start-up or after operating) with transients up to 42 V.
The LMR664x0-Q1 is specifically designed to meet low standby power requirements for always-on, automotive applications. Auto mode enables frequency foldback when operating at light loads, allowing an unloaded typical current consumption of 1.5 µA at 13.5 VIN and high light load efficiency. A seamless transition between PWM and PFM modes along with very low MOSFET ON resistances makes sure there is exceptional efficiency across the entire load range. The control architecture (peak current mode) and feature set are optimized for an ultra-small design size with minimal output capacitance. The device minimizes input filter size by using dual-random spread spectrum (DRSS), a low-EMI enhanced HotRod QFN package, and an optimized pin-out. The MODE/SYNC pin can be used to set or synchronize the frequency to avoid noise sensitive frequency bands. There are NC pins between critical high voltage pins, reducing potential failures (optimal pin FMEA). The rich feature set of the LMR664x0-Q1 is designed to simplify implementation for a wide range of automotive end equipment.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LMR664x0-Q1, 36-V, 1-A, 2-A, and 3-A, Ultra-Small, Synchronous, Automotive Step-Down Converter datasheet | PDF | HTML | 08 Dec 2023 |
| Functional safety information | LMR66430, LMR66430-Q1 Functional Safety FIT Rate, FMD and Pin FMA | PDF | HTML | 17 Nov 2023 | |
| EVM User's guide | LMR66430-Q1 Evaluation Module User's Guide | PDF | HTML | 01 Nov 2023 | |
| Certificate | LMR66430-2EVM EU Declaration of Conformity (DoC) | 04 May 2023 | ||
| Application brief | Step-Down Converter Capacitor Integration Reducing Effort for CISPR 25 Class 5 Compliance | PDF | HTML | 18 Jan 2023 |
For additional terms or required resources, click any title below to view the detail page where available.
The LMR66430-2 evaluation module (EVM) is a platform for the evaluation of the LMR66430 buck converter by containing several jumpers and test points to configure the device on the fly and test out its various features. In addition to evaluating the electrical performance of the LMR66430, this EVM (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN-FCRLF (RXB) | 14 | Ultra Librarian |
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