Product Description
SIMPLE SWITCHER® 150 KHz, 500mA Low Component Count Step-Down RegulatorDescriptionThe LM2594xx series of regulators are monolithic integrated circuits that provide all theactive functions for a step-down (buck) switching regulator, capable of driving a 0.5-A load withexcellent line and load regulation.
These devices are available in fixed output voltages of 3.3 V,5 V, 12 V, and an adjustable output version, and are packaged in a 8-pin PDIP and a 8-pinsurface-mount SOIC package.
Requiring a minimum number of external components, these regulators are simple to use andfeature internal frequency compensation, a fixed-frequency oscillator, and improved line and loadregulation specifications.
Features• 3.3-V, 5-V, 12-V, and adjustable output versions• Adjustable version output voltage range: 1.2 V to 37 V (57-V for the HV version), ±4% maximum over line and load conditions• Available in 8-pin surface-mount SOIC and 8-pin PDIP packages• Ensured 0.5-A output current• Input voltage range up to 60 V• Requires only four external components• 150-kHz Fixed-frequency internal oscillator• TTL shutdown capability• Low power standby mode, IQ typically 85 µA• High efficiency• Uses readily-available standard inductors• Thermal shutdown and current-limit protectionApplcations:• Simple high-efficiency step-down (buck) regulator• Efficient preregulator for linear regulators• On-card switching regulators• Positive-to-negative convertor
