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NCP5424A/D Datasheet

  • NCP5424A/D

  • Dual Synchronous Buck Controller with Input Current Sharing

  • 20頁(yè)

  • ETC

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NCP5424A
Dual Synchronous
Buck Controller with Input
Current Sharing
The NCP5424A is a flexible dual N鈭抍hannel synchronous buck
controller utilizing V
2
鈩?/div>
control for fast transient response and
excellent line and load regulation. This highly versatile controller can
be configured as a single two phase output converter that draws
programmable amounts of current from two different input voltages or
all current from one supply. The NCP5424A can also be configured as
two independent out鈭抩f鈭抪hase controllers.
Using the NCP5424A in a current sharing input configuration is
ideal for applications where more power is required than is available
from one supply, such as video cards or other plug鈭抜n boards. When
configured as a dual output controller, the output of one controller can
be divided down and used as the reference for the second controller.
This tracking capability is useful in applications such as Double Data
Rate (DDR) Memory power where the termination voltage must track
VDD.
The NCP5424A provides a cycle鈭抰o鈭抍ycle current limit allowing
the system to handle transient overcurrent events. In addition, the
NCP5424A provides Soft Start, undervoltage lockout, and built鈭抜n
adaptive FET nonoverlap time to prevent shoot through.
Features
http://onsemi.com
SO鈭?6
D SUFFIX
CASE 751B
1
16
PIN CONNECTIONS AND
MARKING DIAGRAM
1
GATE(H)1
GATE(L)1
GND
BST
IS+1
IS鈭?/div>
V
FB1
COMP1
16
GATE(H)2
GATE(L)2
V
CC
R
OSC
IS+2
V
FB+2
V
FB鈭?
COMP2
NCP5424A
AWLYWW
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Cycle鈭抰o鈭扖ycle Current Limit
Programmable Soft Start
100% Duty Cycle for Enhanced Transient Response
150 kHz to 600 kHz Programmable Frequency Operation
Switching Frequency Set by Single Resistor
Out鈭扥f鈭扨hase Synchronization Between the Channels Reduces the
Input Filter Requirement
鈥?/div>
Undervoltage Lockout
Applications
A
WL
Y
WW
= Assembly Location
= Wafer Lot
= Year
= Work Week
ORDERING INFORMATION
Device
NCP5424AD
NCP5424ADR2
Package
SO鈭?6
SO鈭?6
Shipping
48 Units/Rail
2500 Tape & Reel
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Video Graphics Card
DDR Memory
High Current (Two鈭扨hase) Power Supplies
Dual Output DC鈭扗C Converters
漏
Semiconductor Components Industries, LLC, 2003
1
August, 2003 鈭?Rev. 0
Publication Order Number:
NCP5424A/D

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