IC manufacturers Onsemi

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Onsemi NCV8843

1.5 A, 340 kHz, Buck Regulator with Synchronization Capability

Overview

TopologyBuck Converter
Input voltage6-16 V
Switching frequency306-374 kHz
Output 13.3 V / 1.5 A
IC revision11

Description

The NCV8843 is a 1.5 A buck regulator IC operating at a fixed−frequency of 340 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 NCV8843 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.

Features

  • 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 ConditionsReduces 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 Control
  • These are Pb−Free Devices

Typical applications

  • Automotive
  • Industrial

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