XR79110
22V, 10A Synchronous Step Down COT Power Module
FEATURES
General Description
Controller, drivers, bootstrap diode and capaci-
tor, MOSFETs, Inductor, CIN and COUT integrated
The XR79110 is a 10A synchronous step-down Power Module for point-of
load supplies. A wide 4.5V to 22V input voltage range allows for single
supply operation from industry standard 5V, 12V, and 19.6V rails.
in one package
10A Step Down Module
Wide 4.5V to 22V Input Voltage Range
>0.6V Adjustable Output Voltage
Proprietary Constant On-Time Control
No Loop Compensation Required
Stable Ceramic Output Capacitor Operation
Programmable 200ns to 2μs On-Time
Constant 400kHz to 600kHz Frequency
Selectable CCM or CCM/DCM
CCM/DCM for high efficiency at light-load
CCM for constant frequency at light-load
Programmable Hiccup Current Limit with Ther-
mal Compensation
With a proprietary emulated current mode Constant On-Time (COT) con-
trol scheme, the XR79110 provides extremely fast line and load transient
response using ceramic output capacitors. It requires no loop compensa-
tion hence simplifying circuit implementation and reducing overall compo-
nent count. The control loop also provides 0.35% load and 0.1% 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. With a 96% peak efficiency and 90% for loads as low as
100mA, the XR79110 is suitable for applications where low power losses
are important.
A host of protection features, including over-current, over-temperature,
short-circuit and UVLO, help achieve safe operation under abnormal
operating conditions.
Precision Enable and Power Good flag
Programmable Soft-start
72-pin 10x10x4mm QFN package 260°C solder
temperature
The XR79110 is available in a RoHS compliant, green/halogen free
space-saving 72-pin 10x10x4mm QFN package with a 260°C lead solder
temperature. With integrated controller, drivers, bootstrap diode and
capacitor, MOSFETs, inductor, CIN and COUT, this solution allows the
smallest possible 10A POL design.
APPLICATIONS
Networking and Communications
Fast Transient Point-of-Loads
Industrial and Medical Equipment
Embedded High Power FPGA
Ordering Information – back page
Typical Application
Line Regulation
1.220
1.215
1.210
VIN
VIN
PVIN
Enable/Mode
EN/MODE
PGOOD
VOUT
Power Good
R3
VOUT
SW
1.205
1.200
1.195
1.190
1.185
1.180
CIN
VCC
SS
XR79110
RLIM
R1
R2
ILIM
FB
COUT
TON
CVCC
CSS
RON
AGND
PGND
4
6
8
10 12 14 16 18 20 22
VIN (V)
1 / 20
exar.com/XR79110
Rev 2A
© 2015 Exar Corporation