Description: LM2576 Fixed 5V Voltage Regulator A Class

LM2576-5V Step Down switching regulatorLM2576 voltage regulator is a monolithic integrated circuit ideally suited for easy and convenient design of astep down switching regulator(buck converter). All circuits of this series are capable of driving a 3.0 A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and an adjustable output version. These regulators were designed to minimize the number of external components to simplify the power supply design. Standard series of inductors optimized for use with theLM2576 voltage regulatorare offered by several different inductor manufacturers.Since theLM2576 converter is a switchmode power supply, its efficiency is significantly higher in comparison with popular threeterminal linear regulators, especially with higher input voltages. In many cases, the power dissipated is so low that no heat sink is required or its size could be reduced dramatically. A standard series of inductors optimized for use with theLM2576are available from several different manufacturers. This feature greatly simplifies the design of switchmode power supplies. The LM2576 features include a guaranteed +-4% tolerance on output voltage within specified input voltages and output load conditions, and +-10% on the oscillator frequency (+-2% over 0 DegreeC to 125 DegreeC). External shutdown is included, featuring 80 uA (typical) standby current. The output switch includes cyclebycycle current limiting, as well as thermal shutdown for full protection under fault conditions.

Features of LM2576-5V:

• Output Voltage (Vin = 12 V, ILoad = 0.5 A, TJ = 25 DegreeC) Vout Min4.9V; Max5.1V
• Output Voltage (8 V Vin 40 V, 0.5 A ILoad 3.0 A) Vout V

• Efficiency (Vin = 15 V, ILoad = 3.0 A) =77%
• Guaranteed 3.0 A Output Current
• Wide Input Voltage Range
• Requires Only 4 External Components
• TTL Shutdown Capability, Low Power Standby Mode
• High Efficiency
• Uses Readily Available Standard Inductors
• Thermal Shutdown and Current Limit Protection
• Moisture Sensitivity Level (MSL) Equals 1
• PbFree Packages are Available

Applications of LM2576-5V:

• Simple HighEfficiency StepDown (Buck) Regulator
• Efficient PreRegulator for Linear Regulators
• OnCard Switching Regulators
• Positive to Negative Converter (BuckBoost)
• Negative StepUp Converters
• Power Supply for Battery Chargers

Package Include:

• 1 x LM2576 Fixed 5V Voltage Regulator A Class

• Output Voltage (Vin = 12 V, ILoad = 0.5 A, TJ = 25 DegreeC) Vout Min4.9V; Max5.1V
• Output Voltage (8 V Vin 40 V, 0.5 A ILoad 3.0 A) Vout V
• Efficiency (Vin = 15 V, ILoad = 3.0 A) =77%
• Guaranteed 3.0 A Output Current
• Wide Input Voltage Range
• Requires Only 4 External Components
• TTL Shutdown Capability, Low Power Standby Mode
• High Efficiency
• Uses Readily Available Standard Inductors
• Thermal Shutdown and Current Limit Protection
• Moisture Sensitivity Level (MSL) Equals 1