Semtech Updates Buck Converter Product Family with 1.5A Devices Providing High Efficiency, Simplicity and Convenience
07 Junio 2007 - 7:00AM
Business Wire
Semtech Corp. (Nasdaq:SMTC), a leading supplier of analog and
mixed-signal semiconductors, today announced the SC196 and SC196A,
two new 1.5A DC-DC step-down (buck) regulators. Both devices
feature high efficiency due to low quiescent current and power save
modes to target the lower voltage levels needed for next-generation
portable device designs. The SC196 uses external feedback to allow
the output voltage to be set anywhere between 1.0V and the input
voltage for ultimate design flexibility. The SC196A uses two
programming pins to set the output voltage to 1.0V, 1.05V, 1.2V or
1.8V. The voltage control pins can be hard-wired for a constant
voltage, or they can be tied to a microcontroller and dynamically
switched for applications that use digital power control such as
microcontrollers that have lower sleep-state supply voltages. The
input voltage ranges of 2.5V to 5.5V for SC196, and 2.7V to 5.5V
for SC196A enable the use of many standard voltage rails, including
Li-Ion batteries, as a supply for these devices. The highly
integrated SC196 devices include an internal compensation network
and integrated switching and synchronous MOSFETs that eliminate the
need for an external Schottky diode. Complete power regulation is
achieved using only the SC196A and three discrete components,
giving the user four output voltage options with a minimal bill of
materials. The SC196 requires two extra resistors to program the
output voltages. �With the addition of the SC196 devices, Semtech
has expanded its popular integrated buck converter family to
support heavier loads,� said Karl Volk, Director of Marketing for
Semtech�s Handheld Power Management Products Group. �All of our
digitally programmable parts (SC194A, SC194B, SC196A) are
pin-compatible with each other for easy design propagation,
simplified stocking and sourcing. The external feedback of the
SC196 allows the user to generate voltages not provided by the
other devices.� The flexible clocking scheme of the devices allows
the designer to utilize an internal 1MHz fixed clock or connect the
device to an external oscillator between 750kHz and 1.25MHz for
applications requiring a different frequency or clock
synchronization. The SC196 devices are designed for high efficiency
at all loads to maximize the battery life. The devices feature up
to 95% maximum efficiency at 3.3V output. An industry-impressive
quiescent current of only 17�A, combined with a user-selectable
power save mode (PSAVE), allow the device to automatically enter
pulse frequency modulation (PFM) at light loads and maintain very
high device efficiency. The PSAVE operation can also be disabled
for situations where the load is sensitive to noise. The SC196
devices have built-in soft-start, short-circuit, over-voltage and
over-temperature protection features. Furthermore, fast transient
response protects sensitive loads from extreme supply voltage
variations. The SC196 devices come in a 3mm x 3mm lead-free and
RoHS compliant MLP-10 package. Key Features of the SC196A and SC196
Up to 95% efficiency (3.3V out) Power save operation for optimal
efficiency at light loads 1.5A output current Wide input voltage
range: 2.7V to 5.5V (SC196A), 2.5V to 5.5V (SC196) Selectable
output voltages: 1.0V, 1.05V, 1.2V, 1.8V (SC196A), externally
adjustable for other voltages (SC196) 17�A quiescent current 100%
duty cycle operation Fixed 1 MHz frequency or synchronizable
between 750kHz to 1.25MHz Pricing and Availability The SC196A
(order code: SC196AMLTRT) is available immediately in production
quantities and is priced at $1.42 each in 1,000-piece lots. The
SC196 (order code: SC196MLTRT) is available immediately in
production quantities and is priced at $1.42 each in 1,000-piece
lots. Semtech offers comprehensive design assistance, including
field- and factory-based support. Data sheets, volume pricing, and
delivery quotes, as well as evaluation kits and samples, are
available by contacting salesinfo@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, test & measurement, and
wireless connectivity 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.
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