LM2596S-5.0

The LM2596S series are easy-to-use fixed and adjustable step-down switching regulators. The series offers 3.3V, 5V, and 12V fixed output voltage versions, as well as an adjustable output version. All versions are capable of driving a 3.5A load with excellent line and load regulation. These regulators require minimal external components, are simple to use, and incorporate internal frequency compensation and a fixed-frequency oscillator. Under specified input voltage and output load conditions, output voltage accuracy is guaranteed within ±3% tolerance. Oscillator frequency is guaranteed within ±15% tolerance. The device includes an external shutdown function with a typical quiescent current of 80 μA. Self-protection features include two-stage frequency-reducing current limiting for the output switch and thermal shutdown, providing comprehensive protection under fault conditions.

Applications

• Simple and efficient step-down voltage regulator
• Onboard switching regulator
• Positive-to-negative voltage converter
• LCD monitors and LCD TVs
• DVD recorders and plasma TVs

Key features

• Fixed output voltages of 3.3V, 5V, 12V and adjustable output versions available
• Output voltage adjustable from 1.23V to 37V
• Internal oscillator fixed frequency: 150KHz
• Guaranteed 3.5A output load current
• Input voltage range up to 45V
• Low-power standby mode with typical quiescent current of 80 μA
• TTL-level shutdown function supported
• Excellent line and load regulation
• Only 4 external components required
• High efficiency
• Thermal shutdown and current limiting protection