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© Semiconductor Components Industries, LLC, 2012
April, 2012 − Rev. 1
1 Publication Order Number:
EVBUM2104/D
NCP1521BEVB
NCP1521B Adjustable
Output Voltage Step-Down
Converter Evaluation Board
User's Manual
Overview
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.
Figure 1. Board Picture in TSOP−5
Figure 2. Board Picture in mDFN−6
http://onsemi.com
EVAL BOARD USER’S MANUAL
