Overview
The LM22676MRX-ADJ/NOPB is a high-performance switching regulator from Texas Instruments, designed to implement an efficient high voltage step-down (buck) regulator. This device incorporates a 42 V N-channel MOSFET switch capable of providing up to 3 A of load current. It features excellent line and load regulation along with high efficiency (> 90%). The regulator is easy to use, with internal loop compensation that eliminates the need for external loop compensation components. It offers both fixed and adjustable output voltage options, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.5 to 42 | V |
| Output Voltage Options | ADJ (as low as 1.285 V), 5.0 V (fixed) | V |
| Maximum Output Current | 3 | A |
| Switching Frequency | 500 | kHz |
| Operating Junction Temperature Range | –40°C to 125°C | °C |
| Feedback Reference Accuracy | ±1.5% | % |
| MOSFET On-Resistance (PFM Package) | 120 mΩ | mΩ |
| MOSFET On-Resistance (SO PowerPAD Package) | 100 mΩ | mΩ |
| Standby Quiescent Current | 25 µA (typ) | µA |
| Soft-Start Time | 500 µs (typ) | µs |
| Thermal Shutdown Threshold | 150°C | °C |
Key Features
- Wide Input Voltage Range: 4.5 V to 42 V
- Internally Compensated Voltage Mode Control
- Stable with Low ESR Ceramic Capacitors
- High Efficiency (> 90%)
- Precision Enable Pin for simplified regulator control and system power sequencing
- Integrated Boot-Strap Diode and Soft-Start
- Fully WEBENCH® Enabled for easy design and simulation
- Automotive Grade Option (LM22676Q): AEC-Q100 Grade 1 Qualified
- Thermal Shutdown and Current Limiting for protection against overloads
Applications
The LM22676MRX-ADJ/NOPB is suitable for a variety of applications requiring high-efficiency step-down voltage regulation. These include:
- Automotive Systems: Especially with the LM22676Q option, which is AEC-Q100 Grade 1 Qualified.
- Industrial Power Supplies: Where high input voltage and high efficiency are critical.
- Telecommunications: For power supply modules in communication equipment.
- Consumer Electronics: Such as in power adapters and battery chargers.
- Medical Devices: Where reliable and efficient power supply is essential.
Q & A
- What is the input voltage range of the LM22676MRX-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 options include adjustable (as low as 1.285 V) and fixed 5 V.
- What is the maximum output current of the LM22676MRX-ADJ/NOPB?
The maximum output current is 3 A.
- What is the switching frequency of this regulator?
The switching frequency is 500 kHz.
- What is the operating junction temperature range of the LM22676MRX-ADJ/NOPB?
The operating junction temperature range is from –40°C to 125°C.
- Does the LM22676MRX-ADJ/NOPB have built-in thermal shutdown and current limiting?
- Is the LM22676MRX-ADJ/NOPB suitable for automotive applications?
- What is the standby quiescent current of the regulator?
The standby quiescent current is 25 µA (typ).
- Does the LM22676MRX-ADJ/NOPB have an integrated soft-start feature?
- Is the LM22676MRX-ADJ/NOPB fully WEBENCH® enabled?
