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Semtech Announces Two Core-Voltage Controllers for Mobile Intel Pentium 4 Processor Designs
New controllers provide dual phase and single phase operation with
support for Intel standards;
integrated drivers extend board space savings
CAMARILLO, Calif.—(BUSINESS WIRE)—Aug. 12, 2004—
Semtech Corp. (Nasdaq:SMTC), a leading supplier of analog and
mixed-signal semiconductors for communications, portable devices,
computers, and industrial equipment, today announced availability of
the SC450 and SC451 power supply controllers for use in notebook PCs
based on the latest Intel(R) Pentium(R) M processors.
Both devices comply with Intel mobile PC standards aimed at
extending battery life, including Intel's Mobile Voltage Positioning
(IMVP-IV(TM) and IMVP-IV+(TM)) requirements, which increase battery
life by reducing the voltage at the processor when it is heavily
loaded. Both controllers also support processor speed scaling built
into Intel's SpeedStep(R) processors. The SC450 controller operates
from either 3.3V or 5V; the SC451 device operates from 5V.
Both the SC450, dual-phase hysteretic pulse-width modulating (PWM)
Vcore controller, and the SC451, single-phase Vcore controller,
integrate MOSFET drivers on-chip. This integration saves critical
board space needed by today's smaller form factors. Both devices
support Intel's requirement for a maximum amount of time allowed for
the device to go from the "deeper sleep" mode (C4E) to low-frequency
mode (LFM). The 6-bit DAC on both devices is slew rate limited to
minimize transient currents and audible noise.
Another advantage of the SC450 and SC451 is backward compatibility
with the widely used Semtech SC1476 and SC1479, dual phase and single
phase IMVP-IV controllers. Both new devices continue to incorporate an
automatic power save mode where the controllers detect reverse current
through the inductor (under light load conditions) shutting off the
low-side FET to preserve battery life.
"Semtech continues to expand its core voltage regulator offerings
to support our customers as they adopt new technology. For customers
designing systems at 25 amps or below, using a single phase solution
may be the best and most space saving option. For customers designing
for more current, a dual phase solution is required," said Eddie Yeow,
Vice President of Semtech's Portable Products Group. "The availability
of the pin-compatible upgrades from our SC1476 and SC1479 makes it
easy for customers who design and sell multiple platforms to upgrade
their controllers as they adopt Intel's latest technology and their
specifications change."
Key Features of the SC450 and SC451
-- Complies with Intel IMVP-IV and IMVP-IV+ specifications
-- Easy upgrade from the SC1476 and SC1479 power supply
controllers
-- High-speed, stable hysteretic PWM topology
-- SC450 - multiphase operation with dynamic current sharing in
38-pin TSSOP package
-- SC451 - single-phase operation in both 28-pin TSSOP package or
38-pin TSSOP package
-- 6-bit VID programmable output, accurate to 0.85%
-- 4A integrated gate drivers with soft high-side turn-on
-- Automatic power saving mode for light load efficiency
-- Programmable soft-start operation
-- Boot-voltage setting and open-drain "power good" signal with
blanking
-- Thermal, undervoltage, overvoltage, and programmable
overcurrent protection
Pricing and Availability
The SC450, ordering code SC450ITSTRT, and SC451, ordering code
SC451ITS38TRT, are available now in production quantities and are
priced in 1,000-piece quantities at $3.86 and $2.85, respectively, for
the lead-free TSSOP-38 package. The SC451 also comes in a 28-lead
TSSOP lead-free package, ordering code SC451ITSTRT, priced in
1,000-piece quantities at $2.50. Volume pricing and delivery quotes,
as well as evaluation kits and samples are available by contacting
Semtech's sales representatives and distributors or by contacting
sales@semtech.com. Product datasheets are posted at www.semtech.com.
About Semtech
Semtech Corporation is a leading supplier of high-quality analog
and mixed-signal semiconductor products. The company is dedicated to
providing customers with proprietary solutions and breakthrough
technology in power management, protection, advanced communications,
human interface, and test & measurement products. Publicly traded
since 1967, Semtech is listed on the NASDAQ National Market under the
symbol SMTC. For more information, contact Semtech Corp. at 200 Flynn
Road, Camarillo, CA 93012-8790; phone (805) 498-2111; email to
info@semtech.com; or visit its Web site at www.semtech.com.
Semtech and the Semtech logo are marks of Semtech Corporation.
Intel, Pentium, SpeedStep, IMVP-IV and IMVP-IV+ are marks of Intel
Corp.
Contact:
Semtech Corporation
Terry Sears, 805-480-2052
tsears@semtech.com
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