LM2676 SIMPLE SWITCHER® 8V to 40V, 3A Low Component Count Step-Down Regulator | TI.com

LM2676
ACTIVE
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
SIMPLE SWITCHER® 8V to 40V, 3A Low Component Count Step-Down Regulator

SIMPLE SWITCHER® 8V to 40V, 3A Low Component Count Step-Down Regulator - LM2676
Datasheet
LM2676 SIMPLE SWITCHER® High Efficiency 3-A Step-Down Voltage Regulator datasheet (Rev. K)
 

Recommended alternative parts

  • LMZ14203  -  Looking for a power module? Try the LMZ14203
  • LMR33630  -   3.8 to 38V, 3A SIMPLE SWITCHER synchronous buck converter in a 3x2 hotrod or SOIC8 package with ultra-low EMI and highest efficiency

Description

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® 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/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.

Features

  • Efficiency Up to 94%
  • Simple and Easy to Design With (Using Off-the-
    Shelf External Components)
  • 150-mΩ DMOS Output Switch
  • 3.3-V, 5-V, 12-V Fixed Output and Adjustable
    (1.2 V to 37 V) Versions
  • 50-µA Standby Current When Switched OFF
  • ±2% Maximum Output Tolerance Over Full Line
    and Load Conditions
  • Wide Input Voltage Range: 8 V to 40 V
  • 260-KHz Fixed Frequency Internal Oscillator
  • –40 to 125°C Operating Junction Temperature
    Range
New!
WEBENCH® Power Designer is now even easier to use. Try it now.

WEBENCH® Designer LM2676

  Min   Max Range
Vin –  V 8.0 to 40.0V
Vout  V 1.21 to 40V
Iout  A ≤ 3A
Ambient Temp  °C -40 to 125°C

What are WEBENCH® tools?

Parametrics

Compare all products in Buck converters (integrated switch) Email Download to Excel
Part number Order Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Control mode Duty cycle (Max) (%) Operating temperature range (C) Package Group Rating Type Package size: mm2:W x L (PKG)
LM2676 Order now 8     40     1.23     37     3     1     260     260     4.2     Enable
Over Current Protection    		 Voltage Mode     91     -40 to 125     DDPAK/TO-263 | 7
TO-220 | 7
VSON | 14    		 Catalog     Converter     7DDPAK/TO-263: 154 mm2: 15.24 x 10.1 (DDPAK/TO-263 | 7)
7TO-220: 83 mm2: 8.13 x 10.16 (TO-220 | 7)
14VSON: 30 mm2: 5 x 6 (VSON | 14)    
LM2670 Order now 6.5     40     1.23     37     3     1     260     400     4.2     Frequency Synchronization
Over Current Protection    		 Voltage Mode     91     -40 to 125     DDPAK/TO-263 | 7
TO-220 | 7
VSON | 14    		 Catalog     Converter     7DDPAK/TO-263: 154 mm2: 15.24 x 10.1 (DDPAK/TO-263 | 7)
7TO-220: 83 mm2: 8.13 x 10.16 (TO-220 | 7)
14VSON: 30 mm2: 5 x 6 (VSON | 14)    
LM2671 Order now 6.5     40     1.23     37     0.5     1     225     400     2.5     Enable
Over Current Protection    		 Voltage Mode     95     -40 to 125     PDIP | 8
SOIC | 8
WSON | 16    		 Catalog     Converter     8PDIP: 93 mm2: 9.43 x 9.81 (PDIP | 8)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
16WSON: 25 mm2: 5 x 5 (WSON | 16)    
LM2672 Order now 6.5     40     1.23     37     1     1     225     400     2.5     Enable
Over Current Protection    		 Voltage Mode     95     -40 to 125     PDIP | 8
SOIC | 8
WSON | 16    		 Catalog     Converter     8PDIP: 93 mm2: 9.43 x 9.81 (PDIP | 8)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
16WSON: 25 mm2: 5 x 5 (WSON | 16)    
LM2673 Order now 8     40     1.23     37     3     1     260