XR79106
22V, 6A Synchronous Step-Down
COT Power Module
Description
FEATURES
The XR79106 is part of a family of 22V synchronous step-down
power modules combining the controller, drivers, inductor, passive
components and MOSFETs in a single package for point-of-load
supplies. This module requires very few external components leading
to ease of design and fast time to market. The XR79106 has load
current rating of 6A. A wide 4.5V to 22V input voltage range allows
for single supply operation from industry standard 5V, 12V and
19.6V rails.
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6A step-down power module
4.5V to 22V wide single input voltage
≥0.6V adjustable output voltage
Controller, drivers, inductor, passive
components and MOSFETs integrated in
one package
Proprietary constant on-time control
No loop compensation required
Stable with ceramic output capacitors
Programmable 100ns to1µs on-time
Constant 600kHz to 800kHz frequency
Selectable CCM or DCM/CCM
operation
With a proprietary emulated current mode Constant On-Time (COT)
control scheme, the XR79106 provides extremely fast line and load
transient response using ceramic output capacitors. It requires no
loop compensation, simplifying circuit implementation and reducing
overall component count. The control loop also provides 0.2% load
and 0.2% line regulation and maintains constant operating frequency.
A selectable power saving mode, allows the user to operate in
Discontinuous Current Mode (DCM) at light current loads significantly
increasing the converter efficiency.
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Precision enable and power-good flag
Programmable soft-start
8mm x 8mm x 4mm QFN package
APPLICATIONS
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FPGA, DSP and processor supplies
Distributed power architecture
Point-of-load converters
Power supply modules
Base stations
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A host of protection features, including overcurrent, over temperature,
short-circuit and UVLO, helps achieve safe operation under abnormal
operating conditions.
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Switches and routers
Servers
The XR79106 is available in a RoHS-compliant, green/halogen-free
space-saving 8mm x 8mm x 4mm QFN package.
Typical Application
100
95
90
85
80
75
70
65
V
IN
800kHz
VIN
PVIN
ENABLE/MODE
EN/MODE
PGOOD
VCC
V
POWER GOOD
OUT
VOUT
SW
C
IN
XR79106
R
600kHz
PGOOD
R
LIM
SS
ILIM
FB
5.0V
3.3V
2.5V
1.8V
1.5V
1.2V
1.0V
R
R
FB1
C
OUT
TON
AGND
PGND
C
C
R
VCC
SS
ON
FB2
0
1
2
3
4
5
6
I
(A)
OUT
Figure 1. Typical Application
Figure 2. Efficiency, 12V
IN
REV1B
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