LM2575T-3.3 Step-down switching regulator, adj., 4 - 40 Vin, 3.3 Vout, 1 A,

SIMPLE SWITCHER 1A Step-Down Voltage Regulator

Description: The LM2575 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A 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 LM2575 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in many cases no heat sink is required. A standard series of inductors optimized for use with the LM2575 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies. Other features include a specified ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50 µA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

Features: - 3.3V, 5V, 12V, 15V, and Adjustable Output Versions - Adjustable Version Output Voltage Range, - 1.23V to 37V (57V for HV Version) ±4% Max Over - Line and Load Conditions - Specified 1A Output Current - Wide Input Voltage Range, 40V up to 60V for HV Version - Requires Only 4 External Components - 52 kHz Fixed Frequency Internal Oscillator - TTL Shutdown Capability, Low Power Standby Mode - High Efficiency - Uses Readily Available Standard Inductors - Thermal Shutdown and Current Limit Protection - P+ Product Enhancement Tested