Overview
The LMR14050-Q1 is a 40V, 5A step-down DC-DC converter from Texas Instruments, designed for a wide range of applications including automotive, industrial, telecom, and datacom systems. This device integrates a high-side MOSFET and operates from a 4V to 40V input range, making it suitable for power conditioning from unregulated sources. The LMR14050-Q1 is part of an extended family that includes 2A and 3.5A options in pin-to-pin compatible packages. It features ultra-low quiescent current, internal compensation, and adjustable switching frequency, which simplifies design and minimizes external components. The device is available in 8-pin HSOIC and 10-pin WSON packages with exposed pads for low thermal resistance.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4V to 40V |
| Continuous Output Current | 5A |
| Operating Quiescent Current | 40µA |
| High-Side MOSFET Resistance | 90mΩ (typical) |
| Minimum Switch-On Time | 75ns |
| Switching Frequency Range | 200kHz to 2.5MHz |
| Frequency Synchronization Range | 250kHz to 2.3MHz |
| Shutdown Current | 1µA |
| Ambient Operating Temperature Range | -40°C to 125°C |
| Package Options | 8-pin HSOIC, 10-pin WSON |
Key Features
- Qualified for automotive applications and AEC-Q100 certified
- Ultra-low 40µA operating quiescent current and 1µA shutdown current
- Internal compensation for ease of use and fewer external components
- Adjustable switching frequency from 200kHz to 2.5MHz and frequency synchronization to external clock
- Spread spectrum option for reduced EMI
- High duty cycle operation supported and precision enable input
- External soft-start and built-in protection features (thermal, overvoltage, and short protection)
- Sleep-mode operation at light loads to improve efficiency
- Slope compensation to prevent sub-harmonic oscillations
Applications
- Automotive battery regulation
- Industrial power supplies
- Telecom and datacom systems
- General purpose wide Vin regulation
Q & A
- What is the input voltage range of the LMR14050-Q1?
The input voltage range is from 4V to 40V.
- What is the maximum continuous output current of the LMR14050-Q1?
The maximum continuous output current is 5A.
- What is the operating quiescent current of the LMR14050-Q1?
The operating quiescent current is 40µA.
- What are the package options available for the LMR14050-Q1?
The device is available in 8-pin HSOIC and 10-pin WSON packages.
- Does the LMR14050-Q1 support frequency synchronization?
Yes, it supports frequency synchronization to an external clock within the 250kHz to 2.3MHz range.
- What protection features are built into the LMR14050-Q1?
The device includes thermal, overvoltage, and short protection features.
- How does the LMR14050-Q1 manage efficiency at light loads?
The device operates in Sleep-mode at light loads to improve efficiency by reducing switching and gate drive losses.
- Is the LMR14050-Q1 suitable for automotive applications?
Yes, it is qualified for automotive applications and AEC-Q100 certified.
- What is the shutdown current of the LMR14050-Q1?
The shutdown current is typically 1µA.
- Does the LMR14050-Q1 have internal compensation?
Yes, it has internal compensation which reduces design time and the need for external components.
