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Datasheet
LMR14050SDDAR – Buck Switching Regulator IC 5A SOIC-8
The LMR14050SDDAR from Texas Instruments is a high-efficiency, wide-input 5A synchronous step-down (buck) regulator designed for industrial, automotive, and battery-powered applications. With a 4V to 40V input voltage range and an integrated 90mΩ high-side MOSFET, it provides a compact and reliable DC-DC conversion solution suitable for unregulated or battery-based power sources. The device features current-mode control for superior load and line regulation, offering an adjustable switching frequency from 200kHz to 2.5MHz, allowing designers to optimize efficiency or reduce external component size. The internal loop compensation simplifies circuit design, minimizing external components and ensuring stable operation across a wide range of loads. It also supports frequency synchronization with an external clock, providing flexibility in multi-rail systems.
Designed for energy-sensitive applications, the LMR14050 operates with an ultra-low quiescent current of 40uA in sleep mode and just 1uA in shutdown mode, maximizing battery life. The precision enable pin allows easy sequencing and control of power rails, while comprehensive protection features such as cycle-by-cycle current limit, thermal shutdown, output overvoltage protection, and short-circuit protection ensure reliability and robust operation. Packaged in a thermally enhanced SOIC-8 (SO PowerPAD), this regulator offers superior heat dissipation and high current performance.
Key Features:
- Wide Input Voltage Range: Operates from 4V to 40V for use with automotive and industrial supplies.
- 5A Continuous Output Current: High-current capability for a wide range of DC-DC conversion needs.
- Integrated Power MOSFET: 90mohm high-side FET for low conduction loss and high efficiency.
- High Efficiency: Optimized for power conversion with minimal heat generation.
- Ultra-Low Quiescent Current: 40µA in sleep mode and 1µA in shutdown for extended battery life.
- Adjustable Frequency: 200kHz–2.5MHz range for efficiency or size optimization.
- Frequency Synchronization: Supports synchronization to an external clock source.
- Internal Compensation: Simplifies design, ensuring stability without external components.
- Precision Enable Input: Allows power sequencing and simplified control.
- Comprehensive Protections: Includes OVP, thermal shutdown, current limit, and short-circuit protection.
- Compact Thermally Efficient Package: SOIC-8 with PowerPAD for improved heat dissipation.
