Synchronous buck switching regulator from
Microsemi for consumer electronics apps
Microsemi has extended its family of DC-to-DC controllers
and switching regulators with the introduction of the NX9415,
a new synchronous buck-switching regulator with built-in
power functionality. The NX9415 is suitable for step-down
DC-to-DC converter applications in LCD TVs, set-top boxes,
DSL modems, netbooks, telecom, networking and other point-of-load
DC-to-DC applications.
The NX9415 incorporates a 2MHz controller that supports
an 8- to 22-volt input supply, plus two metal oxide semiconductor
field effect transistors (MOSFETs) with a low, 31-milliohm
RDS (on) and deliver 5 amps of maximum current output. An
internal 5-volt regulator, which provides the voltage supply
to internal logic and a driver circuit, allows for single
supply operation. The module operates from 200 kHz to 2.2
MHz and employs loss-less current limiting by sensing the
RDS (on) of the synchronous MOSFETs.
Other key features of the NX9415 switching regulator are,
Include an internal boost Schottky diode
Adjustable frequency for circuit optimization
Adjustable over-current protection with Hiccup logic
Thermal shutdown capability, a 5-volt gate drive and adaptive
deadband control
Internal digital soft-start capability
A 5-volt undervoltage lock-out and shutdown capability
Microsemi says that in addition to the NX9415, it plans
to extend its switching regulator family to include both
monolithic and multi-chip-module (MCM) products ranging
from 1-amp to 8-amp output currents and input voltages of
5-volts to 18-volts, giving customers a broad portfolio
of options.
"The NX9415 solves the problem of achieving up to
5 amps output current on an 8 to 22 volt bus using the smallest
possible switching regulator with internal power FETs,"
said Amir Asvadi, Director of Marketing with Microsemi's
Analog Mixed Signal Group.
"We continue to drive down the size and cost of high-output
integrated power solutions using advanced MCM packaging,
while also offering a growing family of monolithic controllers
that work with our customers' choice of external power devices,"
Asvadi said. "The unique advantages of MCM DC-to-DC
solutions as compared to monolithic solutions are especially
significant in the 12-volt-and-higher voltage input range
that, until now, required an external adaptor."
Package: 4mm x 4mm, 24-lead quad-flat no-lead (QFN) package
Price: Each at $0.50 in OEM volumes of 1,000
Availability: Now in samples
For more details visit www.microsemi.com
