Overview
The LM22674MRX-5.0/NOPB is a high-efficiency step-down (buck) switching regulator produced by Texas Instruments. It is part of the SIMPLE SWITCHER® family, designed to provide an easy-to-use solution for implementing efficient high-voltage step-down regulators with a minimum number of external components. This regulator incorporates a 42 V N-channel MOSFET switch capable of delivering up to 500 mA of load current, making it suitable for a wide range of applications requiring high efficiency and reliability.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4.5 V to 42 V |
| Output Voltage Options | Fixed 5 V, Adjustable (as low as 1.285 V) |
| Output Current | Up to 500 mA |
| Switching Frequency | 500 kHz |
| Operating Junction Temperature Range | -40°C to 125°C |
| Package Type | HSOIC (DDA) with 8 pins |
| Feedback Reference Accuracy | ±1.5% |
| MOSFET Resistance | 200 mΩ N-Channel MOSFET |
| Shutdown Current | 25 µA (typ) |
| Soft-Start Time | 500 µs (typ) |
Key Features
- Wide Input Voltage Range: 4.5 V to 42 V
- Internally Compensated Voltage Mode Control
- Stable with Low ESR Ceramic Capacitors
- Precision Enable Pin for simplified regulator control and system power sequencing
- Integrated Boot-Strap Diode and Soft-Start
- Fully WEBENCH® Enabled for easy design-in, including external component calculation, electrical simulation, thermal simulation, and Build-It boards
- High Efficiency (> 90%) and excellent line and load regulation
- Thermal Shutdown and Current Limiting for protection against accidental overloads
- SO PowerPAD (Exposed Pad) for improved thermal performance
- AEC-Q100 Grade 1 Qualified for automotive applications (LM22674-Q1)
Applications
The LM22674MRX-5.0/NOPB is suitable for a variety of applications requiring efficient and reliable step-down voltage regulation. These include:
- Automotive Systems: Especially with the LM22674-Q1, which is AEC-Q100 Grade 1 Qualified.
- Industrial Power Supplies: Where high efficiency and reliability are critical.
- Consumer Electronics: Such as set-top boxes, routers, and other devices requiring stable and efficient power supply.
- Telecommunications Equipment: For powering various components in telecom systems.
- General Purpose Power Supplies: Where a wide input voltage range and high efficiency are beneficial.
Q & A
- What is the input voltage range of the LM22674MRX-5.0/NOPB?
The input voltage range is from 4.5 V to 42 V.
- What are the output voltage options for this regulator?
The output voltage can be fixed at 5 V or adjustable down to 1.285 V.
- What is the maximum output current of the LM22674MRX-5.0/NOPB?
The maximum output current is up to 500 mA.
- What is the switching frequency of this regulator?
The switching frequency is 500 kHz.
- What is the operating junction temperature range of the LM22674MRX-5.0/NOPB?
The operating junction temperature range is from -40°C to 125°C.
- What type of package does the LM22674MRX-5.0/NOPB come in?
The regulator comes in an HSOIC (DDA) package with 8 pins.
- Does the LM22674MRX-5.0/NOPB have built-in protection features?
Yes, it includes thermal shutdown and current limiting to protect against accidental overloads.
- Is the LM22674MRX-5.0/NOPB suitable for automotive applications?
Yes, the LM22674-Q1 version is AEC-Q100 Grade 1 Qualified for automotive use.
- What is the typical shutdown current of the LM22674MRX-5.0/NOPB?
The typical shutdown current is 25 µA.
- Does the LM22674MRX-5.0/NOPB support WEBENCH® design tools?
Yes, it is fully WEBENCH® Enabled for easy design-in.
