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XRP6141 Datasheet Preview

XRP6141 Datasheet

35A Synchronous Step Down COT Controller

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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. +1 510 668-7000 Fax. +1 510 668-7001




Exar

XRP6141 Datasheet Preview

XRP6141 Datasheet

35A Synchronous Step Down COT Controller

No Preview Available !

XRP6141
35A Synchronous Step Down COT Controller
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum rating
conditions for extended periods of time may affect
reliability.
VIN ............................................................ -0.3V to 28V
VCC .......................................................... -0.3V to 6.0V
BST .........................................................-0.3V to 34V2
BST-SW ......................................................-0.3V to 6V
SW, ILIM .................................................. -5V to 28V1,2
GH................................................... -0.3V to BST+0.3V
GH-SW........................................................-0.3V to 6V
ALL other pins................................... -0.3V to VCC+0.3V
Storage Temperature .............................. -65°C to 150°C
Junction Temperature .......................................... 150°C
Power Dissipation ................................ Internally Limited
Lead Temperature (Soldering, 10 sec) ................... 300°C
ESD Rating (HBM - Human Body Model) .................... 2kV
OPERATING RATINGS
VIN ........................................................... -0.3V to 22V
VCC .......................................................... -0.3V to 5.5V
SW, ILIM ................................................... -1V to 26V1
PGOOD, VCC, TON, SS, EN, GL, FB ............ -0.3V to 5.5V
Switching Frequency ............................. 200kHz-800kHz3
Junction Temperature Range ....................-40°C to 125°C
Note 1: SW pin’s minimum DC range is -1V, transient is
-5V for less than 50ns
Note 2: No external voltage applied
Note 3: Recommended
ELECTRICAL SPECIFICATIONS
Specifications are for Operating Junction Temperature of TJ = 25°C only; limits applying over the full Operating Junction
Temperature range are denoted by a “•”. Minimum and Maximum limits are guaranteed through test, design, or statistical
correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes
only. Unless otherwise indicated, VIN = 12V, BST=VCC, SW=GND=PGND=0V, CGH=CGL=3.3nF.
Parameter
Min.
Power Supply Characteristics
VIN, Input Voltage Range
5
4.5
IVIN, VIN supply current
IVCC, VCC Quiescent current
IVIN, VIN supply current
IOFF, Shutdown current
Enable and Under-Voltage Lock-Out UVLO
VIH_EN, EN Pin Rising Threshold
1.8
VEN_HYS, EN Pin Hysteresis
VIH_EN, EN Pin Rising Threshold for
DCM/CCM operation
2.9
VEN_HYS, EN Pin Hysteresis
VCC UVLO start threshold, rising edge 4.00
VCC UVLO Hysteresis
Reference voltage
Typ.
12
5.0
0.7
0.7
11
0.1
1.9
50
3.0
100
4.25
200
Max. Units
22
V
5.5
2 mA
2 mA
mA
μA
2.0
3.1
4.50
V
mV
V
mV
V
mV
0.597 0.600 0.603 V
Conditions
VCC regulating
VCC tied to VIN
Not switching, VIN=12V, VFB=0.7V
Not switching, VCC=VIN=5V, VFB=0.7V
f=300kHz, RON=108.8k, VFB=0.58V
Enable=0V, VIN=12V
VIN =5V-22VVCC regulating
VREF, Reference voltage
DC Line regulation
DC Load regulation
0.596
0.604 V
0.594 0.600 0.606
±0.1
±0.25
V
%
%
VIN =4.5V-5.5Vtie VCC to VIN
VIN =5V-22VVCC regulating,
VIN =4.5V-5.5Vtie VCC to VIN
CCM operation, closed loop, applies to any COUT
CCM operation, closed loop, applies to any COUT
© 2015 Exar Corporation
2/14
Rev. 2.0.0


Part Number XRP6141
Description 35A Synchronous Step Down COT Controller
Maker Exar
Total Page 14 Pages
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