Overview
The LM22676TJ-ADJ/NOPB is a high-performance step-down (buck) voltage regulator from Texas Instruments, designed to provide efficient and reliable voltage regulation in a variety of applications. This regulator is part of the SIMPLE SWITCHER® family, known for its ease of use and minimal external component requirements. The LM22676TJ-ADJ/NOPB offers adjustable output voltage options, making it versatile for different system needs. It features a wide input voltage range of 4.5 V to 42 V and can deliver up to 3 A of load current, with high efficiency and excellent line and load regulation.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Input Voltage Range | 4.5 | 42 | V | |
| Output Voltage (ADJ Version) | 1.285 | 5 | V | |
| Output Current | 3 | A | ||
| Switching Frequency | 400 | 500 | 600 | kHz |
| Feedback Reference Accuracy | ±1.5% | |||
| Junction Temperature Range | –40 | 125 | °C | |
| Quiescent Current | 3.4 | 5.3 | mA | |
| Standby Quiescent Current | 25 | 40 | µA | |
| Switch On-Resistance (PFM Package) | 0.12 | 0.16 | Ω | |
| Thermal Shutdown Threshold | 150 | °C |
Key Features
- Wide Input Voltage Range: 4.5 V to 42 V
- Internally Compensated Voltage Mode Control: Simplifies the design process by eliminating 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, reducing heat and improving system reliability.
- Adjustable and Fixed Output Voltage Options: Adjustable output voltage as low as 1.285 V and fixed 5 V output.
- Precision Enable Pin: Allows for precise control over regulator enable and disable.
- Integrated Boot-Strap Diode and Soft-Start: Reduces the need for external components and ensures smooth startup.
- Thermal Shutdown and Current Limiting: Protects against overheating and overcurrent conditions.
- Fully WEBENCH® Enabled: Supports easy design and simulation using TI's WEBENCH® tool.
Applications
- Industrial Control Systems: Suitable for industrial automation and control systems requiring reliable voltage regulation.
- Telecom and Datacom Systems: Used in telecommunications and data communications equipment for efficient power management.
- Embedded Systems: Ideal for embedded systems that require compact, high-efficiency power solutions.
- Conversions from Standard Input Rails: Can be used to convert from standard 24 V, 12 V, and 5 V input rails to lower output voltages.
Q & A
- What is the input voltage range of the LM22676TJ-ADJ/NOPB?
The input voltage range is from 4.5 V to 42 V.
- What is the maximum output current of the LM22676TJ-ADJ/NOPB?
The maximum output current is 3 A.
- What are the output voltage options for the LM22676TJ-ADJ/NOPB?
The output voltage can be adjusted as low as 1.285 V or fixed at 5 V.
- What is the switching frequency of the LM22676TJ-ADJ/NOPB?
The switching frequency is typically 500 kHz, with a range of 400 kHz to 600 kHz.
- Does the LM22676TJ-ADJ/NOPB have built-in thermal protection?
Yes, it has internal thermal shutdown circuitry that activates at about 150°C.
- What is the quiescent current of the LM22676TJ-ADJ/NOPB?
The quiescent current is typically 3.4 mA, with a range of 3.4 mA to 5.3 mA.
- Is the LM22676TJ-ADJ/NOPB suitable for automotive applications?
The LM22676-Q1 version is AEC-Q100 Grade 1 Qualified, making it suitable for automotive applications.
- How does the LM22676TJ-ADJ/NOPB handle overcurrent conditions?
The regulator has built-in current limiting to protect against overcurrent conditions.
- Can the LM22676TJ-ADJ/NOPB be used with low ESR ceramic capacitors?
Yes, it is stable with low ESR ceramic capacitors.
- What tool can be used to simplify the design process for the LM22676TJ-ADJ/NOPB?
Texas Instruments' WEBENCH® design tool can be used to simplify the design process.
