Overview
The LM22674MRE-ADJ/NOPB is a high-efficiency step-down (buck) switching regulator produced by Texas Instruments. This device is part of the SIMPLE SWITCHER® family and is designed to provide an efficient and easy-to-use solution for high-voltage step-down applications. The LM22674 incorporates a 42 V N-channel MOSFET switch, capable of delivering up to 500 mA of load current. It features excellent line and load regulation, high efficiency (> 90%), and a wide input voltage range of 4.5 V to 42 V. The regulator includes internal loop compensation, eliminating the need for external compensation components, and offers fixed and adjustable output voltage options.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Control Mode | Voltage Mode | |
| Input Voltage Range | 4.5 to 42 | V |
| Output Voltage Range | 1.285 to 37 | V |
| Maximum Output Current | 0.5 | A |
| Switching Frequency | 500 | kHz |
| Operating Junction Temperature Range | -40 to 125 | °C |
| Package Type | HSOIC (DDA) | |
| Pins | 8 | |
| Quiescent Current (Typical) | 3.4 | mA |
| Shutdown Current (Typical) | 25 | µA |
Key Features
- Wide Input Voltage Range: 4.5 V to 42 V
- Internally Compensated Voltage Mode Control
- Stable with Low ESR Ceramic Capacitors
- 200 mΩ N-Channel MOSFET
- Output Voltage Options: Fixed (5 V) and Adjustable (as low as 1.285 V)
- ±1.5% Feedback Reference Accuracy
- Switching Frequency of 500 kHz
- Precision Enable Pin
- Integrated Boot-Strap Diode and Soft-Start
- Fully WEBENCH® Enabled
- Thermal Shutdown and Current Limiting for Overload Protection
- AEC-Q100 Grade 1 Qualified for Automotive Applications (LM22674-Q1)
Applications
The LM22674MRE-ADJ/NOPB is suitable for a variety of applications requiring efficient high-voltage step-down conversion. These include:
- Automotive Systems: The LM22674-Q1 version is AEC-Q100 Grade 1 qualified, making it suitable for automotive applications.
- Industrial Power Supplies: Ideal for systems requiring high efficiency and reliability.
- Consumer Electronics: Used in devices that require stable and efficient power conversion.
- Telecommunications: Suitable for power supply modules in telecom equipment.
- Medical Devices: Can be used in medical equipment that requires precise voltage regulation.
Q & A
- What is the input voltage range of the LM22674MRE-ADJ/NOPB?
The input voltage range is from 4.5 V to 42 V.
- What are the output voltage options for the LM22674MRE-ADJ/NOPB?
The output voltage can be fixed at 5 V or adjustable down to 1.285 V.
- What is the maximum output current of the LM22674MRE-ADJ/NOPB?
The maximum output current is 500 mA.
- What is the switching frequency of the LM22674MRE-ADJ/NOPB?
The switching frequency is 500 kHz.
- Does the LM22674MRE-ADJ/NOPB have built-in thermal protection?
- Is the LM22674MRE-ADJ/NOPB suitable for automotive applications?
The LM22674-Q1 version is AEC-Q100 Grade 1 qualified, making it suitable for automotive applications.
- What is the operating junction temperature range of the LM22674MRE-ADJ/NOPB?
The operating junction temperature range is from -40°C to 125°C.
- Does the LM22674MRE-ADJ/NOPB have a precision enable pin?
- What is the quiescent current of the LM22674MRE-ADJ/NOPB in typical conditions?
The quiescent current is typically 3.4 mA.
- How much current does the LM22674MRE-ADJ/NOPB draw in shutdown mode?
