Overview
The LM22675MR-ADJ/NOPB is a high-efficiency step-down (buck) voltage regulator produced by Texas Instruments. This regulator is part of the SIMPLE SWITCHER® family, designed to provide an easy-to-use solution with a minimum number of external components. It incorporates a 42 V N-channel MOSFET switch capable of delivering up to 1 A of load current. The LM22675 features excellent line and load regulation, high efficiency (> 90%), and a wide input voltage range of 4.5 V to 42 V. It is available in adjustable output voltage options as low as 1.285 V and a fixed 5 V output option. The regulator includes internal loop compensation, a precision enable pin, integrated soft-start, and thermal shutdown, making it a robust and reliable choice for various applications.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Input Voltage Range | 4.5 | - | 42 | V |
| Output Voltage Range (ADJ) | 1.285 | - | 42 | V |
| Output Voltage (Fixed 5V) | 4.925 | 5.0 | 5.075 | V |
| Output Current | - | - | 1 | A |
| Switching Frequency | 400 | 500 | 600 | kHz |
| Operating Junction Temperature Range | -40 | - | 125 | °C |
| Quiescent Current | 3.4 | - | 6 | mA |
| Standby Quiescent Current | 25 | - | 40 | µA |
| Current Limit | 1.2 | - | 1.8 | A |
| Switch On-Resistance | 0.2 | - | 0.32 | Ω |
| Enable Threshold Voltage | 1.3 | - | 1.9 | V |
| 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
- Stable with Low ESR Ceramic Capacitors: Ensures reliable operation with a variety of capacitor types
- 200 mΩ N-Channel MOSFET: High-efficiency switching
- Output Voltage Options: Adjustable (as low as 1.285 V) and fixed 5 V output
- ±1.5% Feedback Reference Accuracy: High precision in output voltage regulation
- Switching Frequency of 500 kHz: Allows 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 startup
- Fully WEBENCH® Enabled: Supports easy design with external component calculation, electrical simulation, and more
- Thermal Shutdown and Current Limiting: Protects against accidental overloads and thermal issues
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 embedded systems requiring efficient power management
- Conversions from Standard 24 V, 12 V, and 5 V Input Rails: Versatile for various input voltage standards
- Automotive Systems (LM22675-Q1): AEC-Q100 Grade 1 Qualified for automotive applications
Q & A
- What is the input voltage range of the LM22675MR-ADJ/NOPB?
The input voltage range is from 4.5 V to 42 V.
- What are the output voltage options for the LM22675MR-ADJ/NOPB?
The output voltage can be adjustable (as low as 1.285 V) or fixed at 5 V.
- What is the maximum output current of the LM22675MR-ADJ/NOPB?
The maximum output current is 1 A.
- What is the switching frequency of the LM22675MR-ADJ/NOPB?
The switching frequency is 500 kHz.
- Does the LM22675MR-ADJ/NOPB have built-in thermal protection?
Yes, it has built-in thermal shutdown and current limiting to protect against accidental overloads.
- What is the operating junction temperature range of the LM22675MR-ADJ/NOPB?
The operating junction temperature range is from -40°C to 125°C.
- Is the LM22675MR-ADJ/NOPB suitable for automotive applications?
Yes, the LM22675-Q1 version is AEC-Q100 Grade 1 Qualified for automotive use.
- What is the quiescent current of the LM22675MR-ADJ/NOPB in standby mode?
The standby quiescent current is typically 25 µA.
- Does the LM22675MR-ADJ/NOPB support WEBENCH® design tools?
Yes, it is fully WEBENCH® enabled, supporting external component calculation, electrical simulation, and more.
- What package type is the LM22675MR-ADJ/NOPB available in?
The LM22675MR-ADJ/NOPB is available in an HSOIC (DDA) package with 8 pins.
