NCP5211 Datasheet, PDF (1/13 Pages) ON Semiconductor – Low Voltage Synchronous Buck Controller

NCP5211
Low Voltage Synchronous
Buck Controller
The NCP5211 is a low voltage synchronous buck controller. It
contains all required circuitry for a synchronous buck converter using
external N−Channel MOSFETs. High current internal gate drivers are
capable of driving high gate capacitance of low R_DS(on) NFETs for
better efficiency. The NCP5211 is in a 14−pin package to allow the
designer added flexibility.
The NCP5211 provides overcurrent protection, undervoltage
lockout, Soft−Start and built in adaptive nonoverlap. The NCP5211
also provides adjustable fixed frequency range of 150 kHz to 750 kHz.
This gives the designer more flexibility to make efficiency and
component size compromises. The NCP5211 will operate over a 4.5 V
to 14 V range using either single or dual input voltage.
Features
• Switching Regulator Controller
♦ N−Channel Synchronous Buck Design
♦ V² Control Topology
♦ 200 ns Transient Response
♦ Programmable Fixed Frequency of 150 kHz−750 kHz
♦ 1.0 V 1.5% Internal Reference
♦ Lossless Inductor Sensing Overcurrent Protection
♦ Hiccup Mode Short Circuit Protection
♦ Programmable Soft−Start
♦ 40 ns GATE Rise and Fall Times (3.3 nF Load)
♦ 70 ns Adaptive FET Nonoverlap Time
♦ Differential Remote Sense Capability
• System Power Management
♦ 5.0 V or 12 V Operation
♦ Undervoltage Lockout
♦ On/Off Control Through Use of the COMP Pin
• Pb−Free Packages are Available*
http://onsemi.com
MARKING
DIAGRAM
14
SOIC−14
D SUFFIX
CASE 751A
1
NCP5211xG
AWLYWW
NCP5211x = Specific Device Code
A
= Assembly Location
WL
= Wafer Lot
Y
= Year
WW
= Work Week
G
= Pb−Free Package
PIN CONNECTIONS
1
GATE(H)
BST
LGND
V_FFB
V_FB
COMP
SGND
PGND
GATE(L)
V_C
IS+
IS−
V_CC
R_OSC
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2006
1
April, 2006 − Rev. 0
Publication Order Number:
NCP5211/D