DescriptionFEATURES• 12-V and Adjustable Output Versions • Adjustable Version Output Voltage Range: 1.2-V to 37-V ± 4% Maximum Over Line and Load Conditions • Available TO-263 Packages • 3A Output Load Current • Input Voltage Range Up to 40 V • Requires Only 4 External Components • Excellent Line and Load Regulation Specifications • 150-kHz Fixed-Frequency Internal Oscillator • TTL Shutdown Capability • Low Power Standby Mode, IQ, Typically 80 μA • High Efficiency • Uses Readily Available Standard Inductors • Thermal Shutdown and Current-Limit Protection Applications • Simple High-Efficiency Step-Down (Buck) Regulator • On-Card Switching Regulators • Positive to Negative ConverterDatasheet