Overview
The LM22673MRX-ADJ/NOPB is a high-efficiency step-down (buck) switching regulator produced by Texas Instruments. This regulator is designed to provide all the necessary functions for implementing an efficient high voltage step-down converter using a minimum of external components. It features a 42 V N-channel MOSFET switch capable of delivering up to 3 A of load current, making it suitable for a variety of applications requiring high current and efficiency.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4.5 V to 42 V |
| Output Voltage Options | Adjustable (as low as 1.285 V), Fixed 5 V |
| Maximum Load Current | Up to 3 A |
| Switching Frequency | 500 kHz |
| Feedback Reference Accuracy | ±1.5% |
| Operating Junction Temperature Range | –40°C to 125°C |
| MOSFET On-Resistance | 100 mΩ (SO PowerPAD), 120 mΩ (PFM Package) |
| Package Types | SO PowerPAD (Exposed Pad), PFM (Exposed Pad) |
Key Features
- Wide Input Voltage Range: 4.5 V to 42 V
- Internally Compensated Voltage Mode Control
- Stable with Low ESR Ceramic Capacitors
- Adjustable Soft-Start and Current Limit
- Integrated Boot-Strap Diode
- Fully Webench® Enabled
- AEC-Q100 Grade 1 Qualified for Automotive Applications (LM22673-Q1)
- High Efficiency (> 90%)
- Excellent Line and Load Regulation
Applications
The LM22673MRX-ADJ/NOPB is suitable for various high-current and high-efficiency applications, including but not limited to:
- Automotive Systems (especially with the LM22673-Q1 variant)
- Industrial Power Supplies
- Telecommunications Equipment
- Consumer Electronics
- Server and Data Center Power Supplies
Q & A
- What is the input voltage range of the LM22673MRX-ADJ/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 adjustable (as low as 1.285 V) or fixed at 5 V. - What is the maximum load current this regulator can handle?
The maximum load current is up to 3 A. - What is the switching frequency of the LM22673MRX-ADJ/NOPB?
The switching frequency is 500 kHz. - What is the feedback reference accuracy of this regulator?
The feedback reference accuracy is ±1.5%. - What are the operating junction temperature ranges for this device?
The operating junction temperature range is from –40°C to 125°C. - Does the LM22673MRX-ADJ/NOPB have built-in protection features?
Yes, it includes built-in thermal shutdown and current limiting to protect against accidental overloads. - Is the LM22673MRX-ADJ/NOPB suitable for automotive applications?
Yes, the LM22673-Q1 variant is AEC-Q100 Grade 1 Qualified for automotive applications. - What types of packages are available for the LM22673MRX-ADJ/NOPB?
The available packages include SO PowerPAD (Exposed Pad) and PFM (Exposed Pad). - How can the soft-start and current limit be adjusted on this regulator?
The soft-start can be adjusted using a single external capacitor, and the current limit can be programmed with a single external resistor.
