Overview
The LMR14050-Q1 is a SIMPLE SWITCHER® power converter regulator from Texas Instruments, designed as an easy-to-use step-down DC-DC converter. It operates from a wide input voltage range of 4V to 40V and is capable of delivering up to 5A of DC load current. This device integrates a high-side MOSFET with a typical on-resistance of 90 mΩ, ensuring exceptional efficiency and thermal performance in a compact design. The LMR14050-Q1 is particularly suited for various applications, including automotive, industrial, and general-purpose wide input voltage regulation, due to its robust features and compact packaging options.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4V to 40V |
| Output Current | Up to 5A |
| High-Side MOSFET On-Resistance | Typical 90 mΩ |
| Operating Quiescent Current | Typical 40 μA |
| Shutdown Current | Typical 1 μA |
| Switching Frequency Range | 200 kHz to 2.5 MHz |
| Package Options | 8-pin HSOIC, 10-pin WSON with exposed pad |
| Device Temperature Grade | -40°C to 125°C |
| ESD Classification | HBM ESD Classification Level H1C, CDM ESD Classification Level C4A |
Key Features
- Qualified for automotive applications with AEC-Q100 qualification
- Wide adjustable switching frequency range from 200 kHz to 2.5 MHz
- Frequency synchronization to an external clock within the 250 kHz to 2.3 MHz range
- Internal loop compensation for ease of use and reduced external components
- Precision enable input for simplified regulator control and system power sequencing
- Built-in protection features including cycle-by-cycle current limit, thermal sensing, shutdown due to excessive power dissipation, and output overvoltage protection
- Ultra-low quiescent current in sleep mode (40 μA) and shutdown mode (1 μA) for battery-powered systems
- Spread Spectrum option for reduced EMI
- External soft-start capability
Applications
- Automotive battery regulation
- Industrial power supplies
- Telecom and datacom systems
- General-purpose wide input voltage 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 output current of the LMR14050-Q1?
The maximum output current is up to 5A.
- What is the typical on-resistance of the high-side MOSFET in the LMR14050-Q1?
The typical on-resistance is 90 mΩ.
- What are the package options available for the LMR14050-Q1?
The device is available in 8-pin HSOIC and 10-pin WSON packages with exposed pad.
- Does the LMR14050-Q1 have built-in protection features?
Yes, it includes cycle-by-cycle current limit, thermal sensing, shutdown due to excessive power dissipation, and output overvoltage protection.
- How does the LMR14050-Q1 optimize efficiency at light loads?
The device operates in sleep mode at light loads to reduce switching and gate drive losses, improving efficiency.
- Can the switching frequency of the LMR14050-Q1 be adjusted?
Yes, the switching frequency can be adjusted from 200 kHz to 2.5 MHz using an external resistor.
- Is the LMR14050-Q1 suitable for automotive applications?
Yes, it is qualified for automotive applications with AEC-Q100 qualification.
- What is the quiescent current in sleep mode and shutdown mode?
The quiescent current is typically 40 μA in sleep mode and 1 μA in shutdown mode.
- Does the LMR14050-Q1 support frequency synchronization to an external clock?
Yes, it supports frequency synchronization within the 250 kHz to 2.3 MHz range.
