Overview
The LM2679SX-ADJ/NOPB is a high-efficiency step-down (buck) switching regulator produced by Texas Instruments. It is part of the SIMPLE SWITCHER® family, designed to provide a simple and efficient power supply solution. This regulator can drive loads up to 5 A and operates with an input voltage range of 8 V to 40 V. The LM2679SX-ADJ/NOPB offers adjustable output voltage from 1.2 V to 37 V, making it versatile for various applications. It features a high fixed frequency oscillator at 260 kHz, which allows the use of smaller external components, and includes a soft-start capability to reduce input surge current at power-on.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 8 | 40 | V | |
| Output Voltage Range (Adjustable) | 1.2 | 37 | V | |
| Output Current | 5 | A | ||
| Switch ON-Resistance | 0.12 | 0.14 | 0.225 | Ω |
| Oscillator Frequency | 225 | 260 | 280 | kHz |
| Operating Junction Temperature Range | -40 | 125 | °C | |
| Efficiency | up to 92% | % | ||
| Package Type | TO-263-7 |
Key Features
- High efficiency up to 92%
- Simple and easy to design using off-the-shelf external components
- Resistor programmable peak current limit over a range of 3 A to 7 A
- 120-mΩ DMOS output switch
- Fixed and adjustable output voltage options
- ±2% maximum output tolerance over full line and load conditions
- Soft-start capability to reduce input surge current at power-on
- Built-in thermal shutdown and current limit protection
- High fixed frequency oscillator at 260 kHz
Applications
- Simple-to-design, high-efficiency step-down switching regulators
- Efficient system pre-regulator for linear voltage regulators
- Battery chargers
- General power supply applications requiring high current and efficiency
Q & A
- What is the input voltage range of the LM2679SX-ADJ/NOPB?
The input voltage range is from 8 V to 40 V.
- What is the maximum output current of the LM2679SX-ADJ/NOPB?
The maximum output current is 5 A.
- What is the adjustable output voltage range of the LM2679SX-ADJ/NOPB?
The adjustable output voltage range is from 1.2 V to 37 V.
- What is the efficiency of the LM2679SX-ADJ/NOPB?
The efficiency can be up to 92%.
- What is the oscillator frequency of the LM2679SX-ADJ/NOPB?
The oscillator frequency is fixed at 260 kHz.
- Does the LM2679SX-ADJ/NOPB have built-in protection features?
Yes, it includes thermal shutdown and resistor programmable current limit protection.
- What is the operating junction temperature range of the LM2679SX-ADJ/NOPB?
The operating junction temperature range is from -40°C to 125°C.
- What package type is the LM2679SX-ADJ/NOPB available in?
The LM2679SX-ADJ/NOPB is available in the TO-263-7 package.
- Does the LM2679SX-ADJ/NOPB support soft-start capability?
Yes, it has a soft-start capability to reduce input surge current at power-on.
- What are some common applications of the LM2679SX-ADJ/NOPB?
Common applications include simple-to-design high-efficiency step-down switching regulators, efficient system pre-regulators for linear voltage regulators, and battery chargers.
