XRP6141 Datasheet, PDF (1/14 Pages) Exar Corporation – 35A Synchronous Step Down COT Controller

XRP6141
35A Synchronous Step Down COT Controller
July 2015
GENERAL DESCRIPTION
The XRP6141 is a synchronous step-down
controller for point-of load supplies up to 35A.
A wide 4.5V to 22V input voltage range allows
for single supply operation from industry
standard 5V, 12V and 19.6V rails.
With a proprietary emulated current mode
Constant On-Time (COT) control scheme, the
XRP6141 provides extremely fast line and load
transient response using ceramic output
capacitors. It requires no loop compensation
hence simplifying circuit implementation and
reducing overall component count. The control
loop also provides exceptional line regulation
and maintains constant operating frequency. A
selectable power saving mode, allows the user
to operate in discontinuous mode (DCM) at light
current loads thereby significantly increasing
the converter efficiency.
A host of protection features, including over-
current, over-temperature, short-circuit and
UVLO, help achieve safe operation under
abnormal operating conditions.
The XRP6141 is available in RoHS compliant,
green/halogen free space-saving 16-pin 3x3
QFN package.
Rev. 2.0.0
APPLICATIONS
 Networking and Communications
 Fast Transient Point-of-Loads
 Industrial and Medical Equipment
 Embedded High Power FPGA
FEATURES
 35A Capable Step Down Controller
 Wide Input Voltage Range
o 5V to 22V Single Supply
o 4.5V to 5.5V Low VIN
 Integrated high Current 2A/3A Drivers
 0.6V to 18V Adjustable Output Voltage
 Proprietary Constant On-Time Control
 No Loop Compensation Required
 Ceramic Output Cap. Stable operation
 Programmable 200ns-2µs
 Constant 200kHz-800kHz Frequency
 Selectable CCM or CCM/DCM Operation
 Programmable hiccup current limit
with thermal compensation
 Precision Enable and Power-Good Flag
 Programmable Soft-start
 Integrated Bootstrap diode
 16-pin QFN Package
TYPICAL APPLICATION DIAGRAM
Fig. 1: XRP6141 Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. [phone] – Fax. [phone]