Overview
The LM2676SX-5.0 is a monolithic step-down switching regulator from Texas Instruments, designed to provide a fixed 5.0V output voltage. It is part of the SIMPLE SWITCHER® family and is known for its high efficiency and ease of use. This regulator is capable of delivering up to 3A of output current and features a low ON-resistance DMOS power switch, which enhances its efficiency and performance.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage | 4.9 | 5 | 5.1 | V |
| Input Voltage Range | 8 | 40 | V | |
| Output Current | 3 | A | ||
| Efficiency | 88% | |||
| Oscillator Frequency | 225 | 260 | 280 | kHz |
| Switch ON-resistance | 0.15 | 0.17 | 0.29 | Ω |
| Operating Junction Temperature | -40 | 125 | °C | |
| Package | TO-263 (7-pin) |
Key Features
- High efficiency (> 90%) due to low ON-resistance DMOS power switch
- Fixed 5.0V output voltage with ±2% tolerance over full line and load conditions
- Wide input voltage range: 8V to 40V
- 260kHz fixed frequency internal oscillator
- Simple and easy to design with using off-the-shelf external components
- Built-in thermal shutdown, current limiting, and ON/OFF control input
- Low standby quiescent current of 50µA when switched OFF
Applications
- Microcontroller Power Supplies
- Consumer Electronics
- Portable Instruments
- Industrial Automation
- Telecommunications
- Networking Equipment
- Embedded Systems
- Battery-Powered Devices
Q & A
- What is the output voltage of the LM2676SX-5.0?
The output voltage is fixed at 5.0V with a ±2% tolerance. - What is the maximum output current of the LM2676SX-5.0?
The maximum output current is 3A. - What is the input voltage range for the LM2676SX-5.0?
The input voltage range is from 8V to 40V. - What is the efficiency of the LM2676SX-5.0?
The efficiency is greater than 90%. - What is the oscillator frequency of the LM2676SX-5.0?
The oscillator frequency is fixed at 260kHz. - What is the package type of the LM2676SX-5.0?
The package type is TO-263 (7-pin). - Does the LM2676SX-5.0 have built-in protection features?
Yes, it includes thermal shutdown, current limiting, and ON/OFF control. - What is the standby quiescent current when the regulator is switched OFF?
The standby quiescent current is 50µA. - What are some typical applications for the LM2676SX-5.0?
Typical applications include microcontroller power supplies, consumer electronics, portable instruments, industrial automation, telecommunications, networking equipment, embedded systems, and battery-powered devices. - Where can I find detailed design and application notes for the LM2676SX-5.0?
Detailed information can be found in the datasheet from Texas Instruments and through their WEBENCH design tool.
