NCP1521B: Buck Converter, DC-DC, 1.5 MHz, 600 mA

Description: The NCP1521B step-down PWM DC-DC converter is opti...
  • The NCP1521B step-down PWM DC-DC converter is optimized for portable applications powered from one cell Li-ion or three cell Alkaline/NiCd/NiMH batteries. The part is available in adjustable output voltage versions ranging from 0.9 V to 3.3 V. It uses synchronous rectification to increase efficiency and reduce external part count. The device also has a built-in 1.5 MHz (nominal) oscillator which reduces component size by allowing smaller inductors and capacitors. Automatic switching PWM/PFM mode offers improved system efficiency. Additional features include integrated soft-start, cycle-by-cycle current limiting and thermal shutdown protection. The NCP1521B is available in space saving, low profile TSOP5 and UDFN6 packages.
  • Features
  • 96% efficiency, 30 uA quiescent current, 0.3 uA shutdown current - Extends battery life and 'play-time'
  • 1.5 MHz switching frequency - Allows use of smaller inductor and capacitor
  • Auto-switching between PWM and PFM mode at light load conditions - Low power consumption at light loading
  • Adjustable output voltage from 0.9V to 3.3V
  • Best in class Low Ripple even in PFM mode
  • Applications
  • Power supply for application processor
  • Power supply for processor with low core voltage
  • End Products
  • Cellular phones, smart phones, and PDAs
  • MP3 players and portable audio systems
  • Digital still cameras and video cameras
  • Technical Documentation & Design Resources
    Evaluation/Development Tool Information
    Product Change Notification
    Availability and Samples
    NCP1521BSNT1G
  • Status: Active
  • Compliance: Pb-free Halide free 
  • Description: Buck Converter, DC-DC, 1.5 MHz, 600 mA
  • Package Type: TSOP-5 / SOT-23-5
  • Package Case Outline: 483
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 3000
  • Inventory

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  • Packages
    Specifications
  • Topology: Step-Down 
  • Control Mode: Current Mode 
  • VCC Min (V): 2.7 
  • VCC Max (V): 5.5 
  • VO Typ (V): 0.9 to 3.3 
  • IO Typ (A): 0.6 
  • Efficiency (%): 96 
  • fSW Typ (kHz): 1500 
  • Package Type: TSOP-5 / SOT-23-5 
  • ON Semiconductor Full Web Site