Overview
The LM22673MRX-5.0/NOPB is a high-performance step-down (buck) switching regulator produced by Texas Instruments. This device is designed to provide an efficient and stable voltage regulation solution with a minimal number of external components. It features a wide input voltage range, high efficiency, and excellent line and load regulation, making it suitable for a variety of applications requiring reliable power conversion.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 4.5 | - | 42 | V |
| Output Voltage (Fixed) | 4.925 | 5.0 | 5.075 | V |
| Output Current (Max) | - | - | 3 | A |
| Quiescent Current | 3.4 | - | 6 | mA |
| Switching Frequency | 400 | 500 | 600 | kHz |
| Operating Junction Temperature Range | -40 | - | 125 | °C |
| Feedback Reference Accuracy | - | ±1.5% | - | - |
| Minimum On-time | 100 | - | 300 | ns |
| Thermal Shutdown Threshold | - | - | 150 | °C |
Key Features
- Wide Input Voltage Range: 4.5 V to 42 V
- Internally Compensated Voltage Mode Control: Eliminates the need for external loop compensation components
- Output Voltage Options: Fixed 5 V and adjustable output voltage as low as 1.285 V
- Switching Frequency: 500 kHz, allowing for small external components and good transient response
- Adjustable Soft-Start: Provided through the selection of a single external capacitor
- Adjustable Current Limit: Programmable with a single external resistor
- Integrated Boot-Strap Diode: Simplifies the design and reduces component count
- High Efficiency: Greater than 90%
- Operating Junction Temperature Range: –40°C to 125°C
- Fully Webench® Enabled: For easy design and simulation
- Automotive Grade Option (LM22673-Q1): AEC-Q100 Grade 1 Qualified
Applications
The LM22673MRX-5.0/NOPB is suitable for a wide range of applications, including:
- Automotive systems (with the LM22673-Q1 option)
- Industrial power supplies
- Telecommunications equipment
- Consumer electronics requiring high-efficiency power conversion
- Medical devices needing reliable and stable power regulation
Q & A
- What is the input voltage range of the LM22673MRX-5.0/NOPB?
The input voltage range is from 4.5 V to 42 V.
- What are the output voltage options for the LM22673MRX-5.0/NOPB?
The device offers fixed 5 V output and adjustable output voltage as low as 1.285 V.
- What is the switching frequency of the LM22673MRX-5.0/NOPB?
The switching frequency is 500 kHz.
- How is the soft-start feature adjusted in the LM22673MRX-5.0/NOPB?
The soft-start feature is adjusted through the selection of a single external capacitor.
- What is the maximum output current of the LM22673MRX-5.0/NOPB?
The maximum output current is 3 A.
- Does the LM22673MRX-5.0/NOPB have built-in thermal shutdown protection?
Yes, it has built-in thermal shutdown protection with a threshold of 150°C.
- What is the operating junction temperature range of the LM22673MRX-5.0/NOPB?
The operating junction temperature range is from –40°C to 125°C.
- Is the LM22673MRX-5.0/NOPB RoHS compliant?
Yes, it is RoHS compliant.
- What is the purpose of the integrated boot-strap diode in the LM22673MRX-5.0/NOPB?
The integrated boot-strap diode simplifies the design and reduces the component count by providing the supply for the high-side gate driver.
- Can the LM22673MRX-5.0/NOPB be used in automotive applications?
Yes, the LM22673-Q1 version is AEC-Q100 Grade 1 Qualified for automotive use.
