Overview
The LM22674MR-ADJ/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 providing 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 Current | Up to 500 mA |
| Output Voltage Options | Adjustable (as low as 1.285 V), Fixed 5 V |
| Switching Frequency | 500 kHz |
| Operating Junction Temperature Range | –40°C to 125°C |
| Package Type | HSOIC (DDA) with 8 pins |
| MOSFET Resistance | 200 mΩ N-Channel MOSFET |
| Feedback Reference Accuracy | ±1.5% |
| 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
- Integrated Boot-Strap Diode and Soft-Start
- Fully WEBENCH® Enabled for easy design and simulation
- Automotive Grade Option (LM22674-Q1): AEC-Q100 Grade 1 Qualified
- SO PowerPAD (Exposed Pad) for improved thermal performance
- High Efficiency (> 90%) and excellent line and load regulation
Applications
The LM22674MR-ADJ/NOPB is suitable for various applications requiring efficient and reliable step-down voltage regulation. These include:
- Automotive systems (with the LM22674-Q1 option)
- Industrial power supplies
- Consumer electronics
- Telecommunications equipment
- Medical devices
Q & A
- What is the input voltage range of the LM22674MR-ADJ/NOPB? The input voltage range is 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 switching frequency of the LM22674MR-ADJ/NOPB? The switching frequency is 500 kHz.
- What is the operating junction temperature range of this regulator? The operating junction temperature range is –40°C to 125°C.
- What type of package does the LM22674MR-ADJ/NOPB come in? It comes in an HSOIC (DDA) package with 8 pins.
- Does the LM22674MR-ADJ/NOPB have built-in protection features? Yes, it includes thermal shutdown, current limiting, and soft-start.
- Is the LM22674MR-ADJ/NOPB suitable for automotive applications? Yes, the LM22674-Q1 option is AEC-Q100 Grade 1 Qualified.
- What is the typical shutdown current of the LM22674MR-ADJ/NOPB? The typical shutdown current is 25 µA.
- Does the LM22674MR-ADJ/NOPB support WEBENCH® design tools? Yes, it is fully WEBENCH® enabled.
- What is the typical soft-start time of the LM22674MR-ADJ/NOPB? The typical soft-start time is 500 µs.
