Overview
The LM2676SX-ADJ, produced by Texas Instruments, is a high-efficiency step-down (buck) switching regulator. This monolithic integrated circuit provides all the active functions necessary for a buck switching regulator, making it a comprehensive solution for power supply designs. The LM2676 series is capable of driving up to 3-A loads with excellent line and load regulation characteristics. It features a low ON-resistance DMOS power switch, which ensures high efficiency, typically above 90%.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage | 8 | - | 40 | V |
| Output Voltage (Adjustable) | 1.23 | - | 37 | V |
| Output Current | - | - | 3 | A |
| Switching Frequency | 260 | - | 260 | kHz |
| Quiescent Current | - | 4.2 | 6 | mA |
| Standby Quiescent Current | - | 50 | 100 | µA |
| Current Limit | 3.8 | - | 5.25 | A |
| Switch ON-resistance | - | 0.17 | 0.29 | Ω |
| Operating Temperature Range | -40 | - | 125 | °C |
| Package Type | - | - | TO-263-8, D2Pak | - |
Key Features
- High Efficiency: The LM2676 achieves high efficiency (> 90%) due to the use of a low ON-resistance DMOS power switch.
- Adjustable Output Voltage: The LM2676SX-ADJ version allows for adjustable output voltage from 1.23 V to 37 V.
- Fixed Frequency Oscillator: A high fixed frequency oscillator at 260 kHz enables the use of smaller sized components.
- Thermal Shutdown and Current Limiting: Built-in thermal shutdown and current limiting protect the device from overcurrent and overheating conditions.
- ON/OFF Control Input: An enable input allows the regulator to be powered down to a low 50-µA quiescent current standby condition.
- Low Component Count: The SIMPLE SWITCHER® concept minimizes the number of external components required for the design.
Applications
- Power Supplies: The LM2676 is suitable for various power supply applications requiring high efficiency and low component count.
- Industrial and Automotive Systems: Its operating temperature range of -40°C to 125°C makes it suitable for industrial and automotive environments.
- Embedded Systems and IoT Devices: The adjustable output voltage and high efficiency make it a good fit for embedded systems and IoT devices.
- Telecommunications and Networking Equipment: It can be used in telecommunications and networking equipment where reliable and efficient power supply is crucial.
Q & A
- What is the maximum output current of the LM2676SX-ADJ?
The maximum output current of the LM2676SX-ADJ is 3 A.
- What is the switching frequency of the LM2676SX-ADJ?
The switching frequency of the LM2676SX-ADJ is fixed at 260 kHz.
- What is the operating temperature range of the LM2676SX-ADJ?
The operating temperature range of the LM2676SX-ADJ is -40°C to 125°C.
- Does the LM2676SX-ADJ have built-in thermal shutdown and current limiting?
Yes, the LM2676SX-ADJ has built-in thermal shutdown and current limiting.
- How can the LM2676SX-ADJ be powered down to a low quiescent current state?
The LM2676SX-ADJ can be powered down to a low 50-µA quiescent current standby condition using the ON/OFF control input.
- What is the typical quiescent current of the LM2676SX-ADJ?
The typical quiescent current of the LM2676SX-ADJ is 4.2 mA.
- What is the maximum duty cycle of the LM2676SX-ADJ?
The maximum duty cycle of the LM2676SX-ADJ is 91%.
- What package types are available for the LM2676SX-ADJ?
The LM2676SX-ADJ is available in TO-263-8 and D2Pak packages.
- Is the LM2676SX-ADJ suitable for automotive applications?
Yes, the LM2676SX-ADJ is suitable for automotive applications due to its wide operating temperature range and robust features.
- Can the output voltage of the LM2676SX-ADJ be adjusted?
Yes, the output voltage of the LM2676SX-ADJ can be adjusted from 1.23 V to 37 V.
