Integrated Circuits (ICs)

LM2676T-12/NOPB

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SIMPLE SWITCHER® 8V TO 40V, 3A LOW COMPONENT COUNT STEP-DOWN REGULATOR

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Search across all available documentation for this part.

DocumentsLow EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)+19

Integrated Circuits (ICs)

LM2676T-12/NOPB

Active

Texas Instruments

SIMPLE SWITCHER® 8V TO 40V, 3A LOW COMPONENT COUNT STEP-DOWN REGULATOR

Deep-Dive with AI

DocumentsLow EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)+19

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LM2676T-12/NOPB

Current - Output	3 A
Frequency - Switching	260 kHz
Function	Step-Down
Mounting Type	Through Hole
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	1.81 mOhm
Package / Case	TO-220-7 Formed Leads
Supplier Device Package	TO-220-7
Synchronous Rectifier	False
Topology	Buck
Voltage - Input (Min) [Min]	8 V
Voltage - Output (Min/Fixed)	12 V

LM2676 Series

Part	Number of Outputs	Frequency - Switching	Current - Output	Topology	Voltage - Output (Min/Fixed)	Output Configuration	Operating Temperature [Min]	Operating Temperature [Max]	Output Type	Package / Case	Supplier Device Package	Function	Mounting Type	Voltage - Input (Min) [Min]	Voltage - Output (Max)	Output Type
Texas Instruments LM2676T-12/NOPB	1	260 kHz	3 A	Buck	12 V	Positive	-40 °C	125 ¯C	1.81 mOhm	TO-220-7 Formed Leads	TO-220-7	Step-Down	Through Hole	8 V
Texas Instruments LM2676SX-ADJ	1	260 kHz	3 A	Buck	1.2 V	Positive	-40 °C	125 ¯C		D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	TO-263 (DDPAK-7)	Step-Down	Surface Mount	8 V	37 V	Adjustable
Texas Instruments LM2676SDX-12	1	260 kHz	3 A	Buck	12 V	Positive	-40 °C	125 ¯C	1.81 mOhm	14-VDFN Exposed Pad	14-VSON (5x6)	Step-Down	Surface Mount	8 V
Texas Instruments LM2676SDX-ADJ	1	260 kHz	3 A	Buck	1.2 V	Positive	-40 °C	125 ¯C		14-VDFN Exposed Pad	14-VSON (5x6)	Step-Down	Surface Mount	8 V	37 V	Adjustable
Texas Instruments LM2676SX-5.0	1	260 kHz	3 A	Buck	5 V	Positive	-40 °C	125 ¯C	1.81 mOhm	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	TO-263 (DDPAK-7)	Step-Down	Surface Mount	8 V
Texas Instruments LM2676SD-5.0	1	260 kHz	3 A	Buck	5 V	Positive	-40 °C	125 ¯C	1.81 mOhm	14-VDFN Exposed Pad	14-VSON (5x6)	Step-Down	Surface Mount	8 V
Texas Instruments LM2676S-ADJ/NOPB	1	260 kHz	3 A	Buck	1.2 V	Positive	-40 °C	125 ¯C		D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	TO-263 (DDPAK-7)	Step-Down	Surface Mount	8 V	37 V	Adjustable
Texas Instruments LM2676SX-3.3/NOPB	1	260 kHz	3 A	Buck	3.3 V	Positive	-40 °C	125 ¯C	1.81 mOhm	D2PAK (7 Leads + Tab) TO-263-8 TO-263CA	TO-263 (DDPAK-7)	Step-Down	Surface Mount	8 V
Texas Instruments LM2676T-3.3	1	260 kHz	3 A	Buck	3.3 V	Positive	-40 °C	125 ¯C	1.81 mOhm	TO-220-7 Formed Leads	TO-220-7	Step-Down	Through Hole	8 V
Texas Instruments LM2676SD-ADJ	1	260 kHz	3 A	Buck	1.2 V	Positive	-40 °C	125 ¯C		14-VDFN Exposed Pad	14-VSON (5x6)	Step-Down	Surface Mount	8 V	37 V	Adjustable

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 5.30
		10	$ 4.76
		45	$ 4.50
		135	$ 3.90
		270	$ 3.70
		540	$ 3.32
		1035	$ 2.80
		2520	$ 2.66
Texas Instruments	TUBE	1	$ 4.00
		100	$ 3.50
		250	$ 2.46
		1000	$ 1.98

Description

General part information

LM2676 Series

The LM2676 series of regulators are monolithic integrated circuits which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 3-A loads with excellent line and load regulation characteristics. High efficiency (> 90%) is obtained through the use of a low ON-resistance DMOS power switch. The series consists of fixed output voltages of 3.3 V, 5 V, and 12 V and an adjustable output version.

The SIMPLE SWITCHER power converter concept provides for a complete design using a minimum number of external components. A high fixed frequency oscillator (260 kHz) allows the use of physically smaller sized components. A family of standard inductors for use with the LM2676 are available from several manufacturers to greatly simplify the design process.

The LM2676 series also has built-in thermal shutdown, current limiting, and an ON and OFF control input that can power down the regulator to a low 50‑µA quiescent current standby condition. The output voltage is ensured to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.

Documents

Technical documentation and resources

LM2676T-12/NOPB

Deep-Dive with AI

LM2676T-12/NOPB

Deep-Dive with AI

Technical Specifications

LM2676 Series

Pricing

Description

LM2676 Series

Documents

Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A)

AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B)

AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A)

AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C)

AN-643 EMI/RFI Board Design (Rev. B)

How to increase system reliability and simplify design using DC/DC converters

AN-1197 Selecting Inductors for Buck Converters (Rev. B)

Simple Techniques Minimize Cross-Coupling in Distributed Power Systems

AN-1187 Leadless Leadframe Package (LLP) (Rev. R)

AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C)

AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A)

AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C)

AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C)

Input and Output Capacitor Selection

Semiconductor and IC Package Thermal Metrics (Rev. D)

AN-1135 LM267X 3A, 5A Evaluation Boards (Rev. D)

AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A)

The importance of accurate switching frequency and current limit when selecting bu

Advantages of leaded packages in robust industrial designs

LM2676 SIMPLE SWITCHER® Power Converter, High Efficiency, 3-A, Step-Down Voltage Regulator datasheet (Rev. M)

AN-1Positive-to-Negative Buck-Boost Converter Using LM267x SIMPLE SWITCHER (Rev. E)

LM2676 Series