Overview
The LM22676MRE-5.0/NOPB is a high-efficiency step-down (buck) regulator from Texas Instruments, part of their SIMPLE SWITCHER® family. This regulator is designed to provide an efficient and easy-to-use solution for high voltage step-down applications. It incorporates a 42 V N-channel MOSFET switch capable of delivering up to 3 A of load current. The device features a wide input voltage range of 4.5 V to 42 V and offers fixed 5 V output or adjustable output voltage options. The LM22676 is known for its high efficiency (> 90%), excellent line and load regulation, and a switching frequency of 500 kHz, which allows for the use of small external components and good transient response.
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 | 3 | A | ||
| Switching Frequency | 400 | 500 | 600 | kHz |
| Operating Junction Temperature | –40 | 125 | °C | |
| Feedback Reference Accuracy | ±1.5% | |||
| Quiescent Current | 3.4 | 5.3 | mA | |
| Standby Quiescent Current | 25 | 40 | µA | |
| Package Type | HSOIC (DDA) 8-pin |
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
- Stable with Low ESR Ceramic Capacitors: Ensures stability with a variety of capacitor types
- High Efficiency: Greater than 90% efficiency
- Switching Frequency: 500 kHz, allowing for small external components and good transient response
- Precision Enable Pin: Simplifies regulator control and system power sequencing
- Integrated Boot-Strap Diode and Soft-Start: Reduces the need for external components and ensures smooth start-up
- Thermal Shutdown and Current Limiting: Protects against accidental overloads and high temperatures
- Fully WEBENCH® Enabled: Supports easy design-in with TI's WEBENCH® design tool
- AEC-Q100 Grade 1 Qualified (LM22676Q): Suitable for automotive applications with an operating junction temperature range of –40°C to 125°C
Applications
- Industrial Control: Suitable for industrial automation and control systems
- Telecom and Datacom Systems: Used in telecommunications and data communications equipment
- Embedded Systems: Ideal for various embedded system applications requiring efficient power management
- Conversions from Standard 24 V, 12 V, and 5 V Input Rails: Versatile for different input voltage requirements
Q & A
- What is the input voltage range of the LM22676MRE-5.0/NOPB?
The input voltage range is from 4.5 V to 42 V.
- What is the fixed output voltage of the LM22676MRE-5.0/NOPB?
The fixed output voltage is 5 V.
- What is the maximum output current of the LM22676MRE-5.0/NOPB?
The maximum output current is 3 A.
- What is the switching frequency of the LM22676MRE-5.0/NOPB?
The switching frequency is 500 kHz.
- What is the operating junction temperature range of the LM22676MRE-5.0/NOPB?
The operating junction temperature range is from –40°C to 125°C.
- Does the LM22676MRE-5.0/NOPB have built-in thermal protection?
Yes, it has built-in thermal shutdown circuitry that activates at about 150°C.
- What is the quiescent current of the LM22676MRE-5.0/NOPB in normal operation?
The quiescent current is typically 3.4 mA.
- Is the LM22676MRE-5.0/NOPB suitable for automotive applications?
The LM22676Q version is AEC-Q100 Grade 1 Qualified, making it suitable for automotive applications.
- What design tools are available for the LM22676MRE-5.0/NOPB?
Texas Instruments' WEBENCH® design tool is available for easy design-in and simulation.
- What package type is the LM22676MRE-5.0/NOPB available in?
The device is available in an HSOIC (DDA) 8-pin package.
