LM2597M-5.0/NOPB | Texas Instruments

Step-Down Voltage Regulator, LM2597M-5.0/NOPB, Texas Instruments

The LM2597M-5.0/NOPB regulator is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5-A load with excellent line and load regulation. This switching regulator is similar to the LM2597M-5.0/NOPB, with additional supervisory and performance features added. Requiring a minimum number of external components, the regulator is simple to use and includes internal frequency compensation, improved line and load specifications, a fixed-frequency oscillator, shutdown/soft-start, error flag delay, and an error flag output. The LM2597M-5.0/NOPB operates at a switching frequency of 150 kHz, thus allowing smaller-sized filter components than those required with lower-frequency switching regulators. Because of its high efficiency, the copper traces on the printed-circuit board are normally the only heat sinking required.

Features

• 150-kHz Fixed-Frequency Internal Oscillator
• Shutdown/Soft-Start
• Out of Regulation Error Flag
• Bias Supply Pin (VBS) for Internal Circuitry Improves Efficiency at High Input Voltages
• High Efficiency
• Thermal Shutdown and Current-Limit Protection

Applications

• Simple High-Efficiency Step-Down (Buck) Regulator
• Efficient Preregulator for Linear Regulators
• On-Card Switching Regulators
• Positive-to-Negative Converter