The LMR43606-Q1 is a small, 36V, 0.6A, synchronous step-down DC/DC converter in a 2mm × 2mm HotRod package. This easy-to-use converter supports a wide input voltage range of 3.0V to 36V with transients up to 42V.
The LMR43606-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 current consumption of 1.5µA at 13.5VIN and high light load efficiency. A seamless transition between PWM and PFM modes along with very low MOSFET ON resistances provide exceptional efficiency across the entire load range.
The control architecture and feature-set are designed for an ultra-small design size. The device uses peak current mode control to minimize output capacitance. The LMR43606-Q1 minimizes input filter size by using dual random spread spectrum, a low-EMI HotRod package, and an optimized pinout. The MODE/SYNC and RT pin variants can be used to set or synchronize the frequency between 200kHz and 2.2MHz to avoid noise sensitive frequency bands.
The rich feature set of the LMR43606-Q1 is designed to simplify implementation for a wide range of automotive end equipments.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | LMR43606-Q1, 36V, 0.6A, Automotive Buck Converter With < 2.5µA IQ at 150°C TJMAX in 4mm2 HotRod™ QFN datasheet (Rev. A) | PDF | HTML | 08 Apr 2026 |
| Application brief | Discrete Power Design for C2000™ | PDF | HTML | 15 Aug 2024 | |
| Certificate | LMR43606MQ3EVM-2M EU Declaration of Conformity (DoC) | 06 Mar 2024 | ||
| Functional safety information | LMR43606-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | PDF | HTML | 16 Jan 2024 |
For additional terms or required resources, click any title below to view the detail page where available.
The LMR43606-Q1 is an easy-to-use, synchronous, step-down voltage converter. The LMR43606MQ3EVM-2M is a fully assembled and tested circuit for evaluating the LMR43606-Q1 converter. This EVM is designed to be operated with a 3.5V to 36V input and provides a 3.3V output with a load up to 600mA.
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN-HR (RPE) | 9 | Ultra Librarian |
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