SIMPLE SWITCHER® Automotive 40V, 5A, 2.2MHz Step-Down Converter with 40uA IQ
Product details
Parameters
Package | Pins | Size
Features
- Qualified for Automotive Applications
- AEC-Q100 Qualified With the Following Results:
- Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
- Device HBM ESD Classification Level H1C
- Device CDM ESD Classification Level C4A - 4 V to 40 V Input Range
- 5 A Continuous Output Current
- Ultra-low 40 µA Operating Quiescent Current
- 90 mΩ High-Side MOSFET
- Minimum Switch-On Time: 75 ns
- Current Mode Control
- Adjustable Switching Frequency from 200 kHz to
2.5 MHz - Frequency Synchronization to External Clock
- Spread Spectrum Option for Reduced EMI
- Internal Compensation for Ease of Use
- High Duty Cycle Operation Supported
- Precision Enable Input
- 1 µA Shutdown Current
- External Soft-start
- Thermal, Overvoltage and Short Protection
- 8-Pin HSOIC with PowerPAD™ Package
Description
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.
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | LMR14050-Q1 SIMPLE SWITCHER® 40 V, 5 A Step-Down Converter with 40 µA IQ datasheet (Rev. A) | Feb. 03, 2016 |
| Application notes | Reduce Conducted EMI in Automotive Buck Converter Applications | Jul. 31, 2019 | |
| Technical articles | Minimize the impact of the MLCC shortage on your power application | Mar. 29, 2019 | |
| Application notes | How to Evaluate Junction Temperature Properly with Thermal Metrics (Rev. B) | Mar. 29, 2019 | |
| Application notes | How SYNC Logic Affects EMI Performance for Dual-Channel Buck Converters | Apr. 27, 2018 | |
| Technical articles | There are more ways than you think to reduce conducted EMI | Apr. 16, 2018 | |
| Application notes | Low Conducted EMI Power Solution for Automotive Digital Cockpit With LMR14050 an | Feb. 07, 2018 | |
| Application notes | Design Feedforward Capacitor for LMR14020 | Dec. 20, 2017 | |
| Application notes | How to Evaluate the Maximum Inductor in Internal Compensation PCM Buck Converter | Sep. 20, 2017 | |
| User guides | LMR14050QDPR EVM USer's Guide | Feb. 08, 2016 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- 7V to 40V Input Voltage Range
- Jump Selectable Output Options (5.0V to 3.3V)
- Up to 5A Output Current
- Switching Frequency 400KHz
- Internal Compensation
Description
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 (...)
Features
- Input range: 7V to 36V
- Output: 5.0V or 3.3V
- Maximum load current: 5A
- Switching frequency: 400KHz
- Board size: 76mm x 76mm
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Design files
-
download TIDA-00887 BOM.pdf (63KB) -
download TIDA-00887 Assembly Drawing.pdf (185KB) -
download TIDA-00887 PCB.pdf (1818KB) -
download TIDA-00887 CAD Files.zip (1894KB) -
download TIDA-00887 Gerber.zip (503KB)
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| SO PowerPAD (DDA) | 8 | View options |
| WSON (DPR) | 10 | View options |
Ordering & quality
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