LM2678S-3.3/NOPB Part Information

Details for LM2678S-3.3/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-263
No. of Pins 7Pins
Output Current 5A
Output Voltage Nom. 3.3V
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%
Frequency 260kHz
No. of Outputs 1Outputs
Operating Temperature Min -40°C
Operating Temperature Range -40°C to +125°C
Output Voltage 3.3V
Primary Input Voltage 12V
Supply Voltage Max 40V
Supply Voltage Min 8V
Termination Type Surface Mount Device
Voltage Regulator Type Step Down (Buck)
RoHS Compliant

Alternative Part Descriptions

  • IC, DC/DC CONVERTER, 5A; Topology:Buck (Step Down); Input Voltage Min:8V; Input Voltage Max:40V; DC / DC Converter IC Case:TO-263; No. of Pins:7Pins; Output Current:5A; Output Voltage Nom.:3.3V; Switching Frequency:260kHz; Operating RoHS Compliant: Yes | Newark Electronics
  • Conv DC-DC Single Step Down 8V to 40V 8-Pin(7+Tab) TO-263 Rail | Avnet America
  • PMIC; DC/DC converter; Uin: 8÷40V; Uout: 3.3V; TO263-7; buck | Transfer Multisort Elektronik
  • 8V to 40V, 5A SIMPLE SWITCHER® buck converter with high efficiency | Texas Instruments

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