Texas Instruments LM2576S-3.3/NOPB

SIMPLE SWITCHER® 40V, 3A Low Component Count Step-Down Regulator 5-DDPAK/TO-263 -40 to 125
Switching Regulator, Voltage-mode, 7.5A, 63kHz Switching Freq-Max, PSSO5
Conv DC-DC 4V to 40V Inv/Step Down Single-Out 3.3V 3A 6-Pin(5 Tab) TO-263 Tube
DC/DC Converter IC; Voltage Regulator Type:Buck Switching; Input Voltage Primary Max:40V; Output Voltage Max:3.3V; Output Current Max:3A; Voltage Tolerance ±:0.04%; Supply Voltage Min:4V; Supply Voltage Max:40V ;RoHS Compliant: Yes
IC, DC/DC CONVERTER, 3A; Primary Input Voltage:12V; No. of Outputs:1; Output Voltage:3.3V; Output Current:3A; Voltage Regulator Case Style:TO-263; No. of Pins:5; Operating Temperature Range:-40°C to 125°C; SVHC:No SVHC (19-Dec-2011); Accuracy %:4%; Frequency:52kHz; Input Voltage Max:40V; Output Current Max:3A; Output Voltage Max:3.3V; Package / Case:TO-263 (D2-Pak); Supply Voltage Max:40V; Supply Voltage Min:4V; Switch Output Current Isw Max:3A; Termination Type:SMD; Voltage Regulator Type:Step Down (Buck)
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. Other features include a guaranteed -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 uA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.