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NCP6324GEVB
NCP6324B/C Evaluation
Board User's Manual
3 MHz, 2 A, High Efficiency, Low Ripple,
Adjustable Output Voltage, Synchronous
Buck Converter
Overview
This document is a manual file for a demo board of the
NCP6324B/C, which includes demo board schematics, bill
of materials, PCB layout, jumper setup, and test procedure.
About NCP6324B/C
The NCP6324B/C, a family of synchronous buck
converters, which is optimized to supply different sub
systems of portable applications powered by one cell Li-ion
or three cell Alkaline/NiCd/NiMH batteries. The devices are
able to deliver up to 2 A on an external adjustable voltage
range from 0.6 V to 3.3 V. Operation with 3 MHz switching
frequency allows employing small size inductor and
capacitors. Input supply voltage feed-forward control is
employed to deal with wide input voltage range.
Synchronous rectification and automatic PWM/PFM power
save mode offer improved system efficiency. The
NCP6324B
is
in
a
2.0 × 2.0 × 0.75 mm WDFN−8 package.
Features
•
2.5 V to 5.5 V Input Voltage Range
•
External Adjustable Voltage
•
Up to 2 A Output Current
1uH
Vo = 0.6V to Vin
PGND
Cout
SW
Cfb
10uF
AGND
R1
FB
R2
(a) Power Good Output (NCP6324B)
© Semiconductor Components Industries, LLC, 2014
May, 2014 − Rev. 0
space
saving,
low
profile
NCP6324B
Vin = 2.5V to 5.5V
PVIN
Cin
Rpg
AVIN
10uF
1M
Power Good
MODE/
PG
Enable
EN
Figure 1. Typical Application Circuits
EVAL BOARD USER'S MANUAL
•
3 MHz Switching Frequency
•
Synchronous Rectification
•
Automatic Power Save or External Mode Selection
•
Enable Input
•
Power Good Output
•
Soft Start
•
Over Current Protection
•
Active Discharge When Disabled. Hi−Z Version
Available upon Request
•
Thermal Shutdown Protection
•
WDFN−8, 2 × 2 mm, 0.5 mm Pitch Package
•
Maximum 0.8 mm Height for Super Thin Applications
Typical Applications
•
Cellular Phones, Smart Phones, and PDAs
•
Portable Media Players
•
Digital Still Cameras
•
Wireless and DSL Modems
•
USB Powered Devices
•
Point of Load
•
Game and Entertainment System
1uH
Vo = 0.6V to Vin
Cout
10uF
Cfb
R1
R2
(b) External Mode Selection
(NCP6324C Available upon Request)
1
http://onsemi.com
NCP6324C
Vin = 2.5V to 5.5V
PGND
PVIN
Cin
SW
AVIN
10uF
MODE/
AGND
PG
Enable
FB
EN
Publication Order Number:
EVBUM2243/D
Mode
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Summary of Contents for ON Semiconductor NCP6324GEVB
- Page 1 NCP6324GEVB NCP6324B/C Evaluation Board User's Manual 3 MHz, 2 A, High Efficiency, Low Ripple, Adjustable Output Voltage, Synchronous Buck Converter http://onsemi.com EVAL BOARD USER’S MANUAL • Overview 3 MHz Switching Frequency This document is a manual file for a demo board of the •...
- Page 2 NCP6324GEVB Table 1. PIN DESCRIPTION Name Type Description PGND Power Power Ground for power, analog blocks. Must be connected to the system ground. Ground Power Switch Power pin connects power transistors to one end of the inductor. Output AGND Analog Analog Ground analog and digital blocks.
- Page 3 NCP6324GEVB Electrical Characteristics Schematic of Demo Board electrical characteristics, please refer A schematic of NCP6324B/C evaluation board is shown NCP6324B/C datasheet available website: in Figure 2, which is for a typical application with 1.8 V http://www.onsemi.com. output voltage. It is flexible to configure the board for both PG devices (NCP6324B) and Mode devices (NCP6324C).
- Page 4 NCP6324GEVB PCB Layout of Demo Board ground planes (middle1 layer and middle2 layer) and 2-once A 80 × 50 mm PCB is designed for NCP6324B/C copper traces on top layer and bottom layer of the board. evaluation board. It is a 4-layer board with 1-once internal Figure 3 shows layout information of the board.
- Page 5 NCP6324GEVB Connections and Jumper Setup jumper setup for both configurations are shown in Figure 4. There are two main configurations of the demo board for The default configuration of NCP6324B/C evaluation board two different devices, which are NCP6324B (PG device) is for NCP6324B devices.
- Page 6 NCP6324GEVB Test Procedure of Evaluation Board 7. Set the electronic load to 10 mA and enable its 1. Prepare equipments as below list. output. Typical input supply current is about 6 mA. a. DC power supply 8. Monitor the output voltage and SW node signal b.
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Page 7: Technical Support
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