CS5211
Low Voltage Synchronous
Buck Controller
The CS5211 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 V
2
™
control architecture is used to achieve
unmatched transient response, the best overall regulation and the
simplest loop compensation. The CS5211 is in a 14–pin package to
allow the designer added flexibility.
The CS5211 provides overcurrent protection, undervoltage lockout,
Soft Start and built in adaptive nonoverlap. The CS5211 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 CS5211 will operate over a 4.5 V to 14 V range
using either single of dual input voltage.
Features
•
Switching Regulator Controller
–
N–Channel Synchronous Buck Design
–
V
2
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
http://onsemi.com
MARKING
DIAGRAM
14
SOIC–14
D SUFFIX
CASE 751A
1
x
A
WL, L
YY, Y
WW, W
= E or G
= Assembly Location
= Wafer Lot
= Year
= Work Week
CS5211x
AWLYWW
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 14 of this data sheet.
©
Semiconductor Components Industries, LLC, 2001
1
December, 2001 – Rev. 4
Publication Order Number:
CS5211/D
ONSEMI [ ON SEMICONDUCTOR ]
