LM2677S-12/NOPB Part Information

Details for LM2677S-12/NOPB by Texas Instruments

Electronic & Electrical Components>Semiconductors - ICs>Power Management

Part Description

The LM2677 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. The switching clock frequency can be provided by an internal fixed frequency oscillator (260 kHz) or from an externally provided clock in the range of 280 kHz to 400 kHz, which allows the use of physically smaller-sized components. A family of standard inductors for use with the LM2677 are available from several manufacturers to greatly simplify the design process. The external Sync clock provides direct and precise control of the output ripple frequency for consistent filtering or frequency spectrum positioning. The LM2677 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.

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Part Features

  • 100-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%
  • External Sync Clock Capability (280 kHz to 400 kHz)
  • 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
  • u221240u00b0C 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. 12V
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%
Base Number 2677
Frequency 260kHz
No. of Outputs 1Outputs
Operating Temperature Min -40°C
Operating Temperature Range -40°C to +125°C
Output Voltage 12V
Primary Input Voltage 24V
Termination Type Surface Mount Device
Voltage Regulator Type Step Down (Buck)
RoHS Compliant

Alternative Part Descriptions

  • SIMPLE SWITCHER High Efficiency 5A Step-Down Voltage Regulator with Sync | Texas Instruments

Frequently Asked Questions

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What category does LM2677S-12/NOPB fall under?

The LM2677S-12/NOPB is listed under Electronic & Electrical Components > Semiconductors - ICs > Power Management.

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Is the LM2677S-12/NOPB RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Farnell.

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