LM2576/LM2576HV Series SIMPLE SWITCHERÉ 3A Step-Down Voltage Regulator General Description The LM2576 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving 3A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed-frequency oscillator. The LM2576 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in some cases no heat sink is required. A standard series of inductors optimized for use with the LM2576 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.ICPDF Data chart Download参数,集成电路 Other features include a guaranteed g4% tolerance on output voltage within specified input voltages and output load conditions, and g10% on the oscillator frequency. External shutdown is included, featuring 50 mA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection
