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NCP5211A/D Datasheet

  • NCP5211A/D

  • Low Voltage Synchronous Buck Controller

  • 122.21KB

  • 16頁(yè)

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NCP5211A
Low Voltage Synchronous
Buck Controller
The NCP5211A is a low voltage synchronous buck controller. It
contains all required circuitry for a synchronous buck converter using
external N鈭扖hannel MOSFETs. High current internal gate drivers are
capable of driving low R
DS(on)
NFETs for better efficiency. The
NCP5211A is in a 14 pin package to minimize PCB area.
The NCP5211A provides overcurrent protection, undervoltage
lockout, soft start and built in adaptive nonoverlap. The NCP5211A is
adjustable over a frequency range of 150 kHz to 750 kHz. This gives
the designer more flexibility to make efficiency and component size
compromises. The NCP5211A will operate on a single supply or a
separate boost supply.
Features
http://onsemi.com
MARKING
DIAGRAM
14
SOIC鈭?4
D SUFFIX
CASE 751A
1
B
WL
Y
WW
= Assembly Location
= Wafer Lot
= Year
= Work Week
NCP5211A
BWLYWW
鈥?/div>
Switching Regulator Controller
鈭?/div>
N鈭扖hannel Synchronous Buck Design
鈭?/div>
1.0 Amp Gate Drive Capability
鈭?/div>
200 ns Transient Response
鈭?/div>
Programmable Operating Frequency of 150 kHz鈭?50 kHz
鈭?/div>
0.8 V 1% Internal Reference
鈭?/div>
Lossless Inductor Sensing Overcurrent Protection
鈭?/div>
Cycle鈭抌y鈭扖ycle Short Circuit Protection
鈭?/div>
Programmable Soft Start
鈭?/div>
40 ns GATE Rise and Fall Times (3.3 nF Load)
鈭?/div>
70 ns Adaptive FET Nonoverlap Time
鈭?/div>
Differential Remote Sense Capability
鈥?/div>
System Power Management
鈭?/div>
Operation with a Conversion Rail of 5.0 V or 12 V
鈭?/div>
Undervoltage Lockout
鈭?/div>
On/Off Control Through Use of the COMP Pin
鈭?/div>
Max Duty Cycle Clamped to 70% for Forward Converter Control
Applications
PIN CONNECTIONS
1
GATE(H)
BST
LGND
V
FFB
V
FB
COMP
SGND
PGND
GATE(L)
V
C
IS+
IS鈭?/div>
V
CC
R
OSC
ORDERING INFORMATION
Device
NCP5211AD
NCP5211ADR2
Package
SO鈭?4
SO鈭?4
Shipping鈥?/div>
55 Units/Rail
2500 Tape & Reel
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Set Top Devices
Forward Converters
Buck Converters
Point of Load Regulation
鈥燜or information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
漏
Semiconductor Components Industries, LLC, 2003
1
December, 2003 鈭?Rev. 3
Publication Order Number:
NCP5211A/D

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