Overview
The LM22670MRX-ADJ/NOPB is a high-performance, 3A SIMPLE SWITCHER® buck converter produced by Texas Instruments. This device is designed to provide an efficient high voltage step-down (buck) regulation using a minimum number of external components. It features a wide input voltage range of 4.5V to 42V and can deliver output voltages as low as 1.285V. The LM22670 is part of the SIMPLE SWITCHER® family, known for ease of use and minimal external component requirements, making it ideal for a variety of power management applications.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4.5V to 42V |
| Output Voltage Range | 1.285V to 37V (ADJ), Fixed 5V option available |
| Output Current | Up to 3A |
| Switching Frequency | Default: 500 kHz, Adjustable: 200 kHz to 1 MHz |
| Package Type | HSOIC (DDA) with 8 pins |
| Operating Junction Temperature Range | –40°C to 125°C |
| MOSFET Resistance | 120 mΩ (PFM Package), 100 mΩ (SO PowerPAD-8 Package) |
| Feedback Reference Accuracy | ±1.5% |
| Enable Pin | Precision Enable Pin |
| Soft-Start Time | Typically 500 µs |
| Shutdown Current | Typically 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
- Adjustable and Synchronizable Switching Frequency
- Precision Enable Pin for simplified regulator control and system power sequencing
- Built-in Soft-Start (typically 500 µs) to save external components
- Integrated Boot-Strap Diode and Thermal Shutdown for protection
- Current Limiting to protect against accidental overloads
- Fully WEBENCH® enabled for easy design and simulation
- AEC-Q100 Grade 1 Qualified for automotive applications (LM22670-Q1)
Applications
The LM22670MRX-ADJ/NOPB is suitable for a wide range of applications requiring efficient and reliable power management, including:
- Industrial Power Supplies
- Automotive Systems (LM22670-Q1 is AEC-Q100 Grade 1 Qualified)
- Telecommunications Equipment
- Consumer Electronics
- Medical Devices
- Server and Data Center Power Supplies
Q & A
- What is the input voltage range of the LM22670MRX-ADJ/NOPB?
The input voltage range is from 4.5V to 42V.
- What is the maximum output current of the LM22670MRX-ADJ/NOPB?
The maximum output current is up to 3A.
- What are the output voltage options for the LM22670MRX-ADJ/NOPB?
The output voltage can be adjusted from 1.285V to 37V, or fixed at 5V.
- What is the default switching frequency of the LM22670MRX-ADJ/NOPB?
The default switching frequency is 500 kHz, but it can be adjusted from 200 kHz to 1 MHz.
- What type of package does the LM22670MRX-ADJ/NOPB come in?
The device comes in an HSOIC (DDA) package with 8 pins.
- What is the operating junction temperature range of the LM22670MRX-ADJ/NOPB?
The operating junction temperature range is from –40°C to 125°C.
- Does the LM22670MRX-ADJ/NOPB have built-in protection features?
Yes, it includes thermal shutdown, current limiting, and an integrated boot-strap diode for protection.
- Is the LM22670MRX-ADJ/NOPB suitable for automotive applications?
Yes, the LM22670-Q1 version is AEC-Q100 Grade 1 Qualified for automotive use.
- What is the typical shutdown current of the LM22670MRX-ADJ/NOPB?
The typical shutdown current is 25 µA.
- Does the LM22670MRX-ADJ/NOPB support frequency synchronization?
Yes, the internal oscillator can be synchronized to a system clock or another regulator's oscillator.
