LM2576S-12-JSM

The LM2576 series is a monolithic IC designed for a step-down DC/DC converter, and own the ability of driving a 3A load without additional transistor. It saves board space. The external shutdown function can be controlled by logic level and then come into standby mode. The internal compensation makes feedback control having good line and load regulation without external design. Regarding protected function, thermal shutdown is to prevent over temperature operating from damage, and current limit is against over current operating of the output switch. If current limit function occurs and the voltage difference of feedback (ΔVFB) is down below 0.5V, the switching frequency will be reduced. The LM2576 series operate at a switching frequency of 52KHz thus allow smaller sized filter components than what would be needed with lower frequency switching regulators. Other features include a guaranteed ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±10% on the oscillator frequency. The chips are available in TO263-5L package and TO220-5L package

Applications

• Simple High-Efficiency Step-down Regulator
• On-card Switching Regulators
• Positive to Negative Converter

Key features

• 3.3V, 5V, 12V and Adjustable Output Version
• Output Adjustable Voltage From 1.23V to 37V
• Fixed 52KHz Switching Frequency
• Voltage Mode Non-synchronous PWM Control
• ON/OFF Shutdown Control Input
• Wide 4.5V to 40V Input Voltage Range
• Output Load Current: 3A
• Low Power Standby Mode
• Built-in Switching Transistor on Chip
• Internal Short-Circuit Current Limiting Protections and OVP