NCP1547: 1.5 A, 340 kHz, Low Voltage Buck Regulator with Synchronization Capability

Datasheet: 1.5 A, 340 kHz, Low Voltage Buck Regulator with Synchronization Capability
Rev. 6 (210kB)
Product Overview
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Product Change Notification
The NCP1547 is a 1.5 A buck regulator IC operating at a fixed frequency of 340 kHz. The device employs the V2™ control architecture to provide unmatched transient response, the best overall regulation and the simplest loop compensation. 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 short-circuit protection.
Features   Benefits
  • V2™ Control Architecture
  • Ultra-fast Transient Response, Improved Regulation and Simplified Design
  • 2.0% Error Amp Reference Voltage Tolerance
  • Tight Output Regulation
  • Cycle-by-Cycle Current Limiting
  • Limits Switch and Inductor Current
  • Switch Frequency Decrease of 4:1 in Short Circuit
  • Reduces Short Circuit Power Dissipation
  • Bootstrapped Operation (BOOST)
  • Increased Efficiency and Minimized On-Chip Power Dissipation
  • Synchronization to External Clock (SYNC)
  • Synchronization to External Clock (SYNC)
  • 1.0 A Shutdown Quiescent Current
  • Minimize Current Consumption when SHDNB is Asserted
  • Thermal Shutdown
  • Protect IC from Over-Temperature
  • Soft-Start
  • Decrease Inrush Current and Minimize Output Over-shoot During Start-Up
  • Pb-Free Packages are Available
Applications   End Products
  • Industrial Control
  • Point-of-Load Voltage Regulation
  • Consumer Audio and video
  • Computer and Computer Peripheral
  • Automotive Version Available As NCV8843
  • Dc-dc power supplies
Technical Documentation & Design Resources
Data Sheets (1) Package Drawings (2)
Budgetary Price/Unit
Case Outline
NCP1547DG Obsolete 
Halide free
NCP1547 SOIC-8 751-07 1 260 Tube 98  
NCP1547DR2G Obsolete
Halide free
NCP1547 SOIC-8 751-07 1 260 Tape and Reel 2500  
NCP1547MNR2G Obsolete
Halide free
NCP1547 DFN-18 505 1 260 Tape and Reel 2500  
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : Contact Factory
PandS   (2020-09-14 00:00) : >1K
Market Leadtime (weeks) : Contact Factory
Case Outlines
751-07    505   
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