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NCP1547 - Buck Regulator

Datasheet Summary

Description

SO 8 DFN 18 PIN SYMBOL FUNCTION 1 1 BOOST The BOOST pin provides additional drive voltage to the on

chip NPN power transistor.

The resulting decrease in switch on voltage increases efficiency.

4 VIN This pin is the main power input to the IC.

7

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 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.

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Datasheet preview – NCP1547

Datasheet Details

Part number NCP1547
Manufacturer ON Semiconductor
File Size 210.60 KB
Description Buck Regulator
Datasheet download datasheet NCP1547 Datasheet
Additional preview pages of the NCP1547 datasheet.

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Full PDF Text Transcription

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NCP1547 1.5 A, 340 kHz, Buck Regulator with Synchronization Capability The NCP1547 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 NCP1547 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.
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