NCV8842PWGEVB
NCV8842 Buck Regulator
7.0 V-16 V to 5.0 V, 3.3 V
and 2.5 V @ 1.0 A
Evaluation Board User's
Manual
http://onsemi.com
EVAL BOARD USER’S MANUAL
Description
The NCV8842 Evaluation Boards provide a convenient
way to implement and evaluate a complete practical buck
regulator design. No additional components are required
other than the DC input source and load. Separate boards are
available for the SOIC−16 and DFN−18 versions of the
device. The SOIC−16 board has an input voltage range of
7 V – 16 V and includes jumpers to set the DC output voltage
to 2.5 V, 3.3 V or 5.0 V. The DFN−18 board has an input
voltage range of 6 V – 16 V and is preset for a nominal output
voltage of 3.3 V.
Both boards include SHDNB and SYNC terminals for
logic on−off control of the regulator and synchronization of
the internal controller to a external frequency source instead
of the internal 170 kHz oscillator.
Features
• V@ Control Method for Uncomplicated Loop
Compensation, Fast Transient Response, and Reduced
Board Area
• A Total of 12 Components, Including the IC, to Realize
a Complete Buck Regulator
• Shutdown Terminal to Disable the Output and Provide
a Low Current Drain Standby Mode
• Sync Terminal to Permit Controller Synchronization to
an External Source
• 1.5 A Peak Inductor Current
• Cycle−by−Cycle Frequency−Foldback Current Limiter
• Soft Start Function to Reduce Inrush Current
• 87% Efficiency at 1 A Load Current (5 V Output)
• Line Regulation Better Than 0.02%
• Load Regulation Better Than 0.2%
BR3
VIN
C2
GND
SHDN
BR2
BR1
C3
GND
VOUT
L1
SYNC
Figure 1. NCV8842 Evaluation Board (SOIC Package)
GND
© Semiconductor Components Industries, LLC, 2012
1
May, 2012 − Rev. 3
Publication Order Number:
EVBUM2118/D