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1. Description
The LMR14030 is a 40 V, 3.5 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. 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 furtherprolong 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.
2. Features
1. 4 V to 40 V Input Range
2. 3.5 A Continuous Output Current
3. Ultra-low 40 µA Operating Quiescent Current
4. 90 mΩ High-Side MOSFET
5. Minimum Switch-On Time: 75 ns
6. Current Mode Control
7. Adjustable Switching Frequency from 200 kHz to2.5 MHz
8. Frequency Synchronization to External Clock
9. Internal Compensation for Ease of Use
10. High Duty Cycle Operation Supported
11. Precision Enable Input
12. 1 µA Shutdown Current
13. External Soft-start
14. Thermal, Overvoltage and Short Protection
15. 8-Pin HSOIC with PowerPAD™ Package
3. Pin Configuration and Functions
4. Applications
1. Automotive Battery Regulation
2. Industrial Power Supplies
3. Telecom and Datacom Systems
4. Battery Powered System
5. Simplified Schematic
6. Efficiency vs Output Current
7. Packaging Information
