LM2674MX-5.0/NOPB Datasheet PDF - TI

●Description

●The LM2674 series of regulators are monolithic integrated circuits built with a LMDMOS process. These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 500-mA load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, and an adjustable output version.

●Requiring a minimum number of external components, these regulators are simple to use and include patented internal frequency compensation and a fixed frequency oscillator.

●The LM2674 series operates at a switching frequency of 260 kHz, thus allowing smaller sized filter components than what is required with lower frequency switching regulators. Because of its very high efficiency (>90%), the copper traces on the printed-circuit board are the only heat sinking required.

●Features

●• Efficiency up to 96%

●• Available in 8-Pin SOIC, PDIP, and 16-Pin WSON Packages

●• Simple and Easy to Design With

●• Requires Only 5 External Components

●• Uses Readily Available Standard Inductors

●• 3-V, 5-V, 12-V, and Adjustable Output Versions

●• Adjustable Version Output Voltage Range: 1.21 V to 37 V

●• ±1.5% Maximum Output Voltage Tolerance Over Line and Load Conditions

●• Ensured 500-mA Output Load Current

●• 0.25-Ω DMOS Output Switch

●• Wide Input Voltage Range: 8 V to 40 V

●• 260-kHz Fixed Frequency Internal Oscillator

●• TTL Shutdown Capability, Low Power Standby Mode

●• Thermal Shutdown and Current Limit Protection

●Applications

●• Simple High Efficiency (>90%) Step-Down (Buck) Regulators

●• Efficient Preregulator for Linear Regulators

●• Positive-to-Negative Converters