LM2678T-5.0/NOPB Part Information

Details for LM2678T-5.0/NOPB by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Power Management

Part Description

The LM2678 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 LM2678 are available from several manufacturers to greatly simplify the design process. The LM2678 series also has built-in thermal shutdown, current limiting, and an ON/OFF control input that can power down the regulator to a low 50μA quiescent current standby condition. The output voltage is ensured 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, and 12-V Fixed Output and Adjustable (1.2 V to 37 V) Versions
  • 50-u03bcA Standby Current When Switched OFF
  • Efficiency Up to 92%
  • Simple and Easy to Design Using Off-the-Shelf External Components
  • 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
DC / DC Converter IC Case TO-220
No. of Pins 7Pins
Output Current 5A
Switching Frequency 260kHz
Product Range -
MSL -
RoHS Compliant

Alternative Part Descriptions

  • Step down switch regulator,LM2678T-5 7A | RS Components
  • STEP-DOWN REGULATOR, TO-220-7; TOPOLOGY:; MSL:MSL 1 - Unlimited; SVHC:No SVHC (15-Jan-2019) RoHS Compliant: Yes | Newark Electronics
  • Switch. Reg 5A 5V 45Vs TO220-7 | Schukat Electronic
  • 8V to 40V, 5A SIMPLE SWITCHER® buck converter with high efficiency | Texas Instruments
  • Switching controller IC [Texas Instruments] LM2678T-5.0/NOPB Switching controller IC | Distrelec

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