The LMR14050-Q1 is a 40 V, 5 A step down regulator with an integrated high-side MOSFET. With a wide input range from 4 V to 40 V, it’s suitable for various applications from industrial to automotive for power conditioning from unregulated sources. An extended family is available in 2 A and 3.5 A options in pin-to-pin compatible packages, including LMR14020-Q1 and LMR14030-Q1. The regulator’s quiescent current is 40 µA in Sleep-mode, which is suitable for battery powered systems. An ultra-low 1 µA current in shutdown mode can further prolong battery life. A wide adjustable switching frequency range allows either efficiency or external component size to be optimized. Internal loop compensation means that the user is free from the tedious task of loop compensation design. This also minimizes the external components of the device. A precision enable input allows simplification of regulator control and system power sequencing. The device also has built-in protection features such as cycle-by-cycle current limit, thermal sensing and shutdown due to excessive power dissipation, and output overvoltage protection.
The LMR14050-Q1 is available in an 8-pin HSOIC or 10-pin WSON package with exposed pad for low thermal resistance.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LMR14050-Q1 SIMPLE SWITCHER® 40 V, 5 A Step-Down Converter with 40 µA IQ datasheet (Rev. A) | PDF | HTML | 03 Feb 2016 |
| Application note | Reduce Conducted EMI in Automotive Buck Converter Applications | 31 Jul 2019 | ||
| Application note | How to Evaluate Junction Temperature Properly with Thermal Metrics (Rev. B) | 29 Mar 2019 | ||
| Application note | How SYNC Logic Affects EMI Performance for Dual-Channel Buck Converters | 27 Apr 2018 | ||
| Technical article | There are more ways than you think to reduce conducted EMI | PDF | HTML | 17 Apr 2018 | |
| Application note | Low Conducted EMI Power Solution for Automotive Digital Cockpit With LMR14050 an | 07 Feb 2018 | ||
| Application note | Design Feedforward Capacitor for LMR14020 | 20 Dec 2017 | ||
| Application note | How to Evaluate the Maximum Inductor in Internal Compensation PCM Buck Converter | 20 Sep 2017 | ||
| EVM User's guide | LMR14050QDPR EVM USer's Guide | 08 Feb 2016 |
For additional terms or required resources, click any title below to view the detail page where available.
The LMR14050SEVM is a fully assembled and tested circuit for evaluating the LMR14050S Step-Down Converter. The LMR14050SEVM operates from 7V to 36V input (12V nominal) and provides a 5.0V or 3.3V output at 5A. The board also has jumper connectors to enable or disable the converter operation, change (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
| WSON (DPR) | 10 | Ultra Librarian |
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