LM2591HV

HTC Korea LM2591HV 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, and an adjustable output version.  Available in a standard 5-lead TO-220 package and a 5-lead TO-263 surface mount package. External shutdown is included, featuring typically 30 μA standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown, and protection from output short for full protection under fault conditions.

LM2591HV features :

• 3.3V, 5.0V, 12V and adjustable output versions
• Adjustable output voltage range, 1.23V to 57V
• ±4% max. over line and load conditions
• Guaranteed 1A output current
• Input voltage range: up to 60V
• Requires only 4 external components
• Excellent line and load regulation specifications
• 150kHz fixed frequency internal oscillator
• Low power standby mode, ISTB typically 30μA
• High efficiency
• Thermal shutdown and current limit protection
• Output short protection by reduction of frequency by 3 times

LM2591HV applications :

• Simple high-efficiency step-down (Buck) regulator
• Efficient pre-regulator for linear regulators
• On-card switching regulators