Микросхема LM2574N-ADJ, Импульсный понижающий регулятор напряжения с …

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LM2574N-ADJ, Импульсный понижающий регулятор напряжения с …The LM2574N-ADJ/NOPB is a SIMPLE SWITCHER step down (buck) voltage regulator with adjustable output in 8 pin DIP package. It provides all active functions required for step down (buck) switching regulator. This simple to use regulator includes internal frequency compensation and fixed frequency oscillator. The LM2574 offers high efficiency replacement for popular three terminal linear regulators. It substantially reduces size of heat sink and in many cases, heat sink is not required. A standard series of inductors optimized for use with LM2574 are available from several different manufacturers. This feature greatly simplifies the design of switch mode power supplies. This regulator also includes specified ±4% tolerance on output voltage within specified input voltages and output load conditions and ±10% on oscillator frequency. External shutdown function features 50µA (typical) standby current.

• Adjustable output voltage range from 1.23V to 37V
• Output current of 0.5A
• Wide input voltage range from 4V to 40V
• 52KHz fixed frequency internal oscillator
• TTL shutdown capability and low power standby mode
• Thermal shutdown and current limit protection
• Excellent line and load regulation
• Operating temperature range from -40°C to 125°C
• Requires only four external components