NCP1597B: Synchronous Buck Converter, 1 MHz, 2.0 A

Description: The NCP1597B is a fixed 1 MHz, high-output-current...
  • The NCP1597B is a fixed 1 MHz, high-output-current, synchronous PWM converter that integrates a low-resistance, high-side P-channel MOSFET and a low-side N-channel MOSFET. The NCP1597B utilizes current mode control to provide fast transient response and excellent loop stability. It regulates input voltages from 4.0 V to 5.5 V down to an output voltage as low as 0.8 V and is able to supply up to 2 A. The NCP1597B has features including fixed internal switching frequency (FSW), and an internal soft-start to limit inrush current. Using the EN pin, shutdown supply current is reduced to 3 µA maximum. Other features include cycle-by-cycle current limiting; short-circuit protection, low dropout mode, power saving mode and thermal shutdown. The part is also offered in a 6-pin 3x3mm DFN package under the NCP1597A.
  • Features
  • Input Voltage Range: from 4.0 V to 5.5 V - Optimized for +5V input
  • Internal 140 mΩ HighSide Switching P-FET and 90 mΩ Low-Side N-FET - High efficiency operation
  • Fixed 1 MHz Switching Frequency - Small output inductor and output capacitance
  • Cycle-by-Cycle Current Limiting - Protection feature
  • Overtemperature Protection - Protection feature
  • Start-up with Pre-Biased Output Load - Compatible with uP Core and I/O requirements
  • 0.8 V +/- 1.5% Reference Voltage - Ability to output low output voltage
  • Power Saving Mode During Light Load - Increased efficiency at light load
  • Applications
  • +5V DC-DC Regulator
  • End Products
  • Set-Top-Box
  • LCD-TV / DTV / Plasma TV
  • USB Powered Devices
  • Technical Documentation & Design Resources
    Product Change Notification
    Availability and Samples
    NCP1597BMNTWG
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Synchronous Buck Converter, 1 MHz, 2.0 A
  • Package Type: DFN-10
  • Package Case Outline: 485C
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 3000
  • Inventory

  • Market Leadtime (weeks):2 to 4
  • Arrow:0
  • ON Semiconductor:9,000
  • Applications
    Specifications
  • Topology: Step-Down 
  • Control Mode: Current Mode 
  • VCC Min (V):
  • VCC Max (V): 5.5 
  • VO Typ (V): 0.8 to 4.95 
  • IO Typ (A):
  • Efficiency (%): 90 
  • fSW Typ (kHz): 1000 
  • Package Type: DFN-10 
  • ON Semiconductor Full Web Site