LM2676S-ADJ/NOPB
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Texas Instruments LM2676S-ADJ/NOPB

Manufacturer No:
LM2676S-ADJ/NOPB
Manufacturer:
Texas Instruments
Package:
Tube
Description:
IC REG BUCK ADJ 3A TO263-7
Delivery:
Payment:
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Product Introduction

Overview

The LM2676S-ADJ/NOPB is a high-efficiency step-down (buck) switching regulator produced by Texas Instruments. This monolithic integrated circuit provides all the active functions necessary for a buck switching regulator, making it a versatile and efficient power management solution. The LM2676 series is designed to drive up to 3-A loads with excellent line and load regulation characteristics. It features a low ON-resistance DMOS power switch, which contributes to its high efficiency of over 90%.

The regulator is available in fixed output voltages of 3.3 V, 5 V, and 12 V, as well as an adjustable output version that can be set between 1.2 V and 37 V. The SIMPLE SWITCHER® concept allows for a complete design using a minimum number of external components, simplifying the design process.

Key Specifications

Parameter Min Typ Max Unit
Input Supply Voltage - - 45 V
Output Voltage (Fixed Versions) 3.234 (3.3V), 4.9 (5V), 11.76 (12V) 3.3, 5, 12 3.366 (3.3V), 5.1 (5V), 12.24 (12V) V
Output Voltage (Adjustable Version) 1.2 - 37 V
Output Current - - 3 A
Efficiency 86% (3.3V), 88% (5V), 94% (12V) - - %
Oscillator Frequency 225 260 280 kHz
Switch ON-Resistance 0.15 0.17 0.29 Ω
Operating Junction Temperature -40 - 125 °C
Standby Quiescent Current 50 - 100 µA

Key Features

  • High efficiency up to 94% due to the use of a low ON-resistance DMOS power switch.
  • Simple and easy to design with, using off-the-shelf external components.
  • Fixed output voltages of 3.3 V, 5 V, and 12 V, and an adjustable output version from 1.2 V to 37 V.
  • Wide input voltage range: 8 V to 40 V.
  • 260 kHz fixed frequency internal oscillator.
  • Built-in thermal shutdown, current limiting, and ON/OFF control input.
  • Low standby current of 50 µA when switched OFF.
  • ±2% maximum output voltage tolerance over full line and load conditions.

Applications

  • Communication modules
  • Electricity meters
  • Calling button operating panels
  • Motor drives

Q & A

  1. What is the input voltage range of the LM2676S-ADJ/NOPB?

    The input voltage range is from 8 V to 40 V.

  2. What are the fixed output voltages available for the LM2676S-ADJ/NOPB?

    The fixed output voltages are 3.3 V, 5 V, and 12 V.

  3. What is the adjustable output voltage range for the LM2676S-ADJ/NOPB?

    The adjustable output voltage range is from 1.2 V to 37 V.

  4. What is the maximum output current of the LM2676S-ADJ/NOPB?

    The maximum output current is 3 A.

  5. What is the efficiency of the LM2676S-ADJ/NOPB?

    The efficiency can be up to 94% depending on the output voltage and load conditions.

  6. What is the oscillator frequency of the LM2676S-ADJ/NOPB?

    The oscillator frequency is fixed at 260 kHz.

  7. Does the LM2676S-ADJ/NOPB have built-in protection features?

    Yes, it includes built-in thermal shutdown, current limiting, and an ON/OFF control input.

  8. What is the standby quiescent current when the regulator is switched OFF?

    The standby quiescent current is 50 µA.

  9. What is the output voltage tolerance of the LM2676S-ADJ/NOPB?

    The output voltage tolerance is ±2% over full line and load conditions.

  10. What are some typical applications of the LM2676S-ADJ/NOPB?

    Typical applications include communication modules, electricity meters, calling button operating panels, and motor drives.

Product Attributes

Function:Step-Down
Output Configuration:Positive
Topology:Buck
Output Type:Adjustable
Number of Outputs:1
Voltage - Input (Min):8V
Voltage - Input (Max):40V
Voltage - Output (Min/Fixed):1.2V
Voltage - Output (Max):37V
Current - Output:3A
Frequency - Switching:260kHz
Synchronous Rectifier:No
Operating Temperature:-40°C ~ 125°C (TJ)
Mounting Type:Surface Mount
Package / Case:TO-263-8, D²Pak (7 Leads + Tab), TO-263CA
Supplier Device Package:DDPAK/TO-263-7
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Similar Products

Part Number LM2676S-ADJ/NOPB LM2678S-ADJ/NOPB LM2677S-ADJ/NOPB LM2676T-ADJ/NOPB LM2676SX-ADJ/NOPB LM2676SD-ADJ/NOPB
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Product Status Active Active Active Active Active Active
Function Step-Down Step-Down Step-Down Step-Down Step-Down Step-Down
Output Configuration Positive Positive Positive Positive Positive Positive
Topology Buck Buck Buck Buck Buck Buck
Output Type Adjustable Adjustable Adjustable Adjustable Adjustable Adjustable
Number of Outputs 1 1 1 1 1 1
Voltage - Input (Min) 8V 8V 8V 8V 8V 8V
Voltage - Input (Max) 40V 40V 40V 40V 40V 40V
Voltage - Output (Min/Fixed) 1.2V 1.21V 1.21V 1.2V 1.2V 1.2V
Voltage - Output (Max) 37V 37V 37V 37V 37V 37V
Current - Output 3A 5A 5A 3A 3A 3A
Frequency - Switching 260kHz 260kHz 260kHz 260kHz 260kHz 260kHz
Synchronous Rectifier No No No No No No
Operating Temperature -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ)
Mounting Type Surface Mount Surface Mount Surface Mount Through Hole Surface Mount Surface Mount
Package / Case TO-263-8, D²Pak (7 Leads + Tab), TO-263CA TO-263-8, D²Pak (7 Leads + Tab), TO-263CA TO-263-8, D²Pak (7 Leads + Tab), TO-263CA TO-220-7 Formed Leads TO-263-8, D²Pak (7 Leads + Tab), TO-263CA 14-VDFN Exposed Pad
Supplier Device Package DDPAK/TO-263-7 DDPAK/TO-263-7 DDPAK/TO-263-7 TO-220-7 DDPAK/TO-263-7 14-VSON (5x6)

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