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