Overview
The LMR14050-Q1, produced by Texas Instruments, is a 40V, 5A step-down regulator with an integrated high-side MOSFET. This device is designed to handle a wide input range from 4V to 40V, making it suitable for various applications, including industrial and automotive power conditioning from unregulated sources. The regulator is part of a family that includes 2A and 3.5A options in pin-to-pin compatible packages, such as the LMR14020-Q1 and LMR14030-Q1. It features an ultra-low quiescent current of 40µA in sleep mode and 1µA in shutdown mode, which is beneficial for battery-powered systems. The device is available in 8-pin HSOIC and 10-pin WSON packages with exposed pads for low thermal resistance.
Key Specifications
| Specification | Value |
|---|---|
| Input Voltage Range | 4V to 40V |
| Output Current | 5A continuous |
| High-Side MOSFET Resistance | 90mΩ |
| Switch-On Time | 75ns minimum |
| Quiescent Current | 40µA operating, 1µA shutdown |
| Switching Frequency | Adjustable from 200kHz to 2.5MHz |
| Operating Temperature Range | -40°C to 125°C |
| Package Type | 8-Pin HSOIC or 10-Pin WSON with PowerPAD™ |
| ESD Classification | HBM: H1C, CDM: C4A |
Key Features
- Qualified for automotive applications with AEC-Q100 certification
- Ultra-low quiescent current of 40µA and 1µA in shutdown mode
- Current mode control with adjustable switching frequency from 200kHz to 2.5MHz
- Frequency synchronization to external clock and spread spectrum option for reduced EMI
- Internal compensation for ease of use and minimized external components
- High duty cycle operation supported
- Precision enable input for simplified regulator control and system power sequencing
- External soft start capability
- Thermal, overvoltage, and short protection features
Applications
The LMR14050-Q1 is designed for a variety of applications, including:
- Automotive systems: Suitable for power conditioning in automotive environments due to its AEC-Q100 qualification.
- Industrial systems: Can handle unregulated power sources and provide stable output voltage.
- Battery-powered systems: The ultra-low quiescent current helps in prolonging battery life.
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 output current of the LMR14050-Q1?
The maximum output current is 5A continuous. - What is the quiescent current of the LMR14050-Q1 in sleep mode?
The quiescent current is 40µA in sleep mode and 1µA in shutdown mode. - What are the package options for the LMR14050-Q1?
The device is available in 8-pin HSOIC and 10-pin WSON packages with exposed pads. - Is the LMR14050-Q1 qualified for automotive applications?
Yes, it is qualified for automotive applications with AEC-Q100 certification. - What is the operating temperature range of the LMR14050-Q1?
The operating temperature range is from -40°C to 125°C. - Does the LMR14050-Q1 have built-in protection features?
Yes, it includes thermal, overvoltage, and short protection features. - Can the switching frequency of the LMR14050-Q1 be adjusted?
Yes, the switching frequency can be adjusted from 200kHz to 2.5MHz. - Does the LMR14050-Q1 support frequency synchronization to an external clock?
Yes, it supports frequency synchronization to an external clock. - What is the purpose of the spread spectrum option in the LMR14050-Q1?
The spread spectrum option is for reduced EMI.
