LM2679S-ADJ/NOPB Part Information

Details for LM2679S-ADJ/NOPB by Texas Instruments

Electronic & Electrical Components>Semiconductors - ICs>Power Management

Part Description

The LM2679 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 5-A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ONresistance 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 LM2679 are available from several manufacturers to greatly simplify the design process. Other features include the ability to reduce the input surge current at power on by adding a soft-start timing capacitor to gradually turn on the regulator. The LM2679 series also has built-in thermal shutdown and resistor programmable current limit of the power MOSFET switch to protect the device and load circuitry under fault conditions. The output voltage is specified to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance.

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Part Features

  • 120-mu03a9 DMOS Output Switch
  • 260-kHz Fixed Frequency Internal Oscillator
  • 3.3-V, 5-V, 12-V Fixed Output and Adjustable (1.2 V to 37 V) Versions
  • Efficiency Up to 92%
  • Resistor Programmable Peak Current Limit Over a Range of 3 A to 7 A
  • Simple and Easy to Design Using Off-The-Shelf External Components
  • Soft-Start Capability
  • Wide Input Voltage Range: 8 V to 40 V
  • u00b12% Maximum Output Tolerance Over Full Line and Load Conditions
  • u221240 to 125u00b0C Operating Junction Temperature

Part Specifications

Topology Buck (Step Down)
Input Voltage Min 8V
Input Voltage Max 40V
No. of Outputs 1Outputs
DC / DC Converter IC Case TO-263
No. of Pins 7Pins
Output Current 5A
Output Voltage Min 1.2V
Output Voltage Max 37V
Switching Frequency 260kHz
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 3 - 168 hours
SVHC No SVHC (27-Jun-2018)
Accuracy % 2%
Adjustable Output Voltage Min 1.2V
Frequency 280kHz
Operating Temperature Min -40°C
Operating Temperature Range -40°C to +125°C
Output Voltage 37V
Primary Input Voltage 40V
Supply Voltage Min 8V
Termination Type Surface Mount Device
Voltage Regulator Type Step Down (Buck)
RoHS Compliant

Alternative Part Descriptions

  • Stepdown switching regulator,LM2679S-ADJ | RS Components
  • IC, DC/DC CONVERTER, 5A; Topology:Buck (Step Down); Input Voltage Min:8V; Input Voltage Max:40V; No. of Outputs:1Outputs; DC / DC Converter IC Case:TO-263; No. of Pins:7Pins; Output Current:5A; Output Voltage Min:1.2V; Output VoltageRoHS Compliant: Yes | Newark Electronics
  • PMIC; DC/DC converter; Uin: 8÷40V; Uout: 1.2÷37V; TO263-7; buck | Transfer Multisort Elektronik
  • SIMPLE SWITCHER® 8V to 40V, 5A Step-Down DC/DC Switching Regulator with Adjustable Current Limit | Texas Instruments
  • Switching controller IC [Texas Instruments] LM2679S-ADJ/NOPB Switching controller IC | Distrelec

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