Onsemi NCV8842

Beschreibung

The NCV8842 is a 1.5 A buck regulator IC operating at a fixed−frequency of 170 kHz. The device uses the V2 control architecture to provide unmatched transient response, the best overall regulation and the simplest loop compensation for today’s high−speed logic. The NCV8842 accommodates input voltages from 4.0 V to 40 V and contains synchronization circuitry.The on−chip NPN transistor is capable of providing a minimum of 1.5 A of output current, and is biased by an external “boost” capacitor to ensure saturation, thus minimizing on−chip power dissipation.Protection circuitry includes thermal shutdown, cycle−by−cycle current limiting and frequency foldback.

Eigenschaften

• V2 Architecture Provides Ultra−Fast Transient Response, Improved Regulation and Simplified Design
• Wide Operating Range: 4 V to 40 V
• 2.0% Error Amp Reference Voltage Tolerance
• Switch Frequency Decrease of 4:1 in Short Circuit Conditions Reduces Short Circuit Power Dissipation
• BOOST Lead Allows “Bootstrapped” Operation to Maximize Efficiency
• Sync Function for Parallel Supply Operation or Noise Minimization
• Shutdown Lead Provides Power−Down Option
• 1.0 A Quiescent Current During Power−Down
• Thermal Shutdown
• Soft−Start
• Exposed Pad Packages for Enhanced Thermal Characteristics
• NCV Prefix for Automotive and Other Applications Requiring Siteand Change Controls
• These are Pb−Free Devices

Remarks:

• For most applications, the inductor value falls in the range between 2.2uH and 22uH.

Weiterführende Informationen

• Datenblatt