Overview
The LM22672MRX-ADJ/NOPB is a high-efficiency step-down (buck) voltage 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 1 A of load current. The LM22672 offers 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 an HSOIC (DDA) package with 8 pins and features internal loop compensation, eliminating the need for external loop compensation components.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 4.5 V to 42 V |
| Output Voltage Options | ADJ (as low as 1.285 V), 5.0 V (fixed) |
| Maximum Output Current | 1 A |
| Switching Frequency | 500 kHz (default), adjustable from 200 kHz to 1 MHz |
| Junction Temperature Range | –40°C to 125°C |
| Package Type | HSOIC (DDA) with 8 pins |
| Feedback Reference Accuracy | ±1.5% |
| MOSFET Resistance | 200 mΩ N-Channel MOSFET |
| Quiescent Current (Typ) | 3.4 mA |
| Enable Input | Precision Enable Input |
Key Features
- Wide Input Voltage Range: 4.5 V to 42 V
- Internally Compensated Voltage Mode Control
- Stable with Low ESR Ceramic Capacitors
- 200 mΩ N-Channel MOSFET
- Output Voltage Options: ADJ (as low as 1.285 V), 5.0 V (fixed)
- ±1.5% Feedback Reference Accuracy
- 500 kHz Default Switching Frequency, adjustable from 200 kHz to 1 MHz
- Adjustable Switching Frequency and Synchronization
- –40°C to 125°C Junction Temperature Range
- Precision Enable Input
- Integrated Boot-Strap Diode
- Adjustable Soft-Start
- Fully WEBENCH® Enabled
- AEC-Q100 Grade 1 Qualified for Automotive Applications (LM22672-Q1)
- SO PowerPAD (Exposed Pad)
Applications
The LM22672MRX-ADJ/NOPB is suitable for a variety of applications requiring high-efficiency step-down voltage regulation. These include:
- Automotive systems (LM22672-Q1 is AEC-Q100 Grade 1 Qualified)
- Industrial power supplies
- Telecommunications equipment
- Consumer electronics requiring high voltage step-down conversion
- Point-of-load (POL) power supplies in various electronic systems
Q & A
- What is the input voltage range of the LM22672MRX-ADJ/NOPB?
The input voltage range is 4.5 V to 42 V.
- What are the output voltage options for this regulator?
The output voltage options are ADJ (as low as 1.285 V) and 5.0 V (fixed).
- What is the maximum output current of the LM22672MRX-ADJ/NOPB?
The maximum output current is 1 A.
- What is the default switching frequency, and can it be adjusted?
The default switching frequency is 500 kHz, and it can be adjusted from 200 kHz to 1 MHz.
- What is the junction temperature range of this regulator?
The junction temperature range is –40°C to 125°C.
- Is the LM22672MRX-ADJ/NOPB suitable for automotive applications?
Yes, the LM22672-Q1 version is AEC-Q100 Grade 1 Qualified for automotive applications.
- What type of package does the LM22672MRX-ADJ/NOPB come in?
The regulator comes in an HSOIC (DDA) package with 8 pins.
- Does the LM22672MRX-ADJ/NOPB have internal loop compensation?
Yes, it has internally compensated voltage mode control.
- What is the quiescent current of the LM22672MRX-ADJ/NOPB?
The quiescent current is typically 3.4 mA.
- Does the LM22672MRX-ADJ/NOPB support adjustable soft-start?
Yes, it supports adjustable soft-start through the selection of a single external capacitor.
