LM2576HVT-ADJ

The LM2576HV series regulators are monolithic integrated circuits ideally suited for easy design of step-down switching regulators (buck converters). All circuits in this series are capable of driving a 3.0A load with excellent line and load regulation. These devices are available in 3.3V, 5.0V, 12V, 15V fixed output voltages and an adjustable output version. These regulators are designed to minimize the number of external components, simplifying power supply design. Features of the LM2576HV include: output voltage tolerance of ±4% under specified input voltage and output load conditions; oscillator frequency tolerance of ±10%. The device includes an external shutdown function with a typical standby current of 50µA. The output switch features cycle-by-cycle current limiting and thermal shutdown, providing complete protection under fault conditions.

Applications

• Simple, high-efficiency buck regulator
• High-efficiency pre-regulator for linear regulators
• On-board switching regulator
• Positive-to-negative voltage converter
• Negative voltage boost converter
• Battery charger power supply

Key features

• Available in 3.3V, 5.0V, 12V, 15V, and adjustable output versions
• Adjustable version output voltage range: 1.23V to 52V, maximum deviation ±4% under specified line and load conditions
• Guaranteed 3.0A output current
• Wide input voltage range: up to 60V
• Only 4 external components required
• 52kHz fixed-frequency internal oscillator
• TTL shutdown capability with low-power standby mode
• High efficiency
• Compatible with standard off-the-shelf inductors
• Thermal shutdown and current limiting protection
• SMD package compliant with moisture sensitivity level 3