HTC LM2575GT-12

The LM2575 series are monolithic ICs designed for a step-down DC/DC converter, capable of driving 1A load without an additional transistor. It saves a board space. The external shutdown function is controlled by a logic level and then the circuit comes into the standby mode. The internal compensation makes the feedback control with good line and load regulation characteristics without an external design. Regarding the protection functions – the thermal shutdown prevents circuit damage during the over temperature operation and the current limit is against overcurrent operation of the output switch. If the case for the current limiting occurs and VFB is down by 40% of the nominal output voltage, the switching frequency shall be reduced. The fixed output voltage version includes 3.3V, 5V, 12V devices, while the adjustable version voltages range from 1.23V to 37V. The chips are available in a standard 5-lead TO-220, TO-263 and SOP-8PP package.

• 3.3V, 5.0V, 12V and Adjustable Output Versions
• Adjustable Version Output Voltage Range
• Wide Input Voltage Range
• Guaranteed 1A Output Current
• 52kHz Fixed Frequency Internal Oscillator
• Voltage mode non-synchronous PWM control
• On/Off shutdown control input
• Thermal Shutdown and Current Limit Protection
• Moisture Sensitivity Level 3 for SMD packages

• Simple High-Efficiency Step-Down(Buck) Regulator
• Efficient Pre-Regulator for Linear Regulators
• On-Card Switching Regulators
• Positive to Negative Converter(Buck-Boost)