Description
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 a 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.
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.
A host of protection features, including overcurrent, over temperature,
short-circuit and UVLO, helps achieve safe operation under abnormal
operating conditions.
The XR79106 is available in a RoHS-compliant, green / halogen-free
space-saving 8mm x 8mm x 4mm GQFN package.

EATURES
■ 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
■ Precision enable and power-good flag
■ Programmable soft-start
■ 8mm x 8mm x 4mm GQFN package

APPLICATIONS
■ FPGA, DSP and processor supplies
■ Distributed power architecture
■ Point-of-load converters
■ Power supply modules
■ Base stations
■ Switches and routers
■ Servers