The LM62440-Q1 is an automotive-focused, high-performance, DC-DC synchronous step-down converter. With integrated high-side and low-side MOSFETs, up to 4 A of output current is delivered over a wide input range of 3.0 V to 36 V; 42-V tolerance supports load dump for durations of 400 ms. The LM62440-Q1 implements soft recovery from dropout, eliminating overshoot on the output.
The LM62440-Q1 is specifically designed for minimal EMI. The device incorporates pseudorandom spread spectrum, adjustable SW node rise time, a low-EMI VQFN-HR package featuring low switch node ringing, and an optimized pinout for ease of use. The switching frequency can be synchronized between 200 kHz and 2.2 MHz to avoid noise sensitive frequency bands. In addition, either 2.1-MHz or 400-kHz frequency factory options can be selected for improved efficiency at low operating frequency or smaller solution size at high operating frequency.
Auto mode enables frequency foldback when operating at light loads, allowing an unloaded current consumption of only 7 µA (typical) and high light load efficiency. Seamless transition between PWM and PFM modes, along with very low MOSFET ON resistances and an external bias input, provides exceptional efficiency across the entire load range.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM62440-Q1 Automotive 3-V to 36-V, 4-A, Low EMI Synchronous Step-Down Converter datasheet (Rev. E) | PDF | HTML | 18 Apr 2022 |
| Functional safety information | LM62440-Q1 Functional Safety, FIT Rate, Failure Mode Distribution, and Pin FMA (Rev. A) | PDF | HTML | 17 May 2022 | |
| Application note | How to Migrate Between LM614xx and LM624xx Product Families | PDF | HTML | 01 Nov 2021 | |
| Technical article | Introduction to EMI: Standards, causes and mitigation techniques | PDF | HTML | 21 Apr 2021 | |
| Selection guide | Buck Converter Quick Reference Guide (Rev. B) | 08 Apr 2021 | ||
| Technical article | Powering levels of autonomy: a quick guide to DC/DC solutions for SAE autonomy lev | 18 Nov 2020 | ||
| Technical article | Optimizing flip-chip IC thermal performance in automotive designs | PDF | HTML | 11 Dec 2019 | |
| EVM User's guide | LM62440-Q1 EVM User's Guide | 22 Jun 2018 |
For additional terms or required resources, click any title below to view the detail page where available.
The LP8774x-Q1 device is designed to meet the power management requirements of the AWR and IWR MMICs in various automotive and industrial radar applications. The device has three step-down DC/DC converters, a 5 V boost converter and a 1.8 V/3.3 V LDO. The LDO is powered from the boost and (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VQFN-HR (RJR) | 14 | Ultra Librarian |
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