15V, 200mA Synchronous Buck-Boost DC/DC Converter with Only 1.3µA of Quiescent Current

News Release ⎜ www.linear.com
15V, 200mA Synchronous Buck-Boost DC/DC Converter with Only
1.3µA of Quiescent Current
MILPITAS, CA – March 18, 2013 – Linear Technology announces the LTC3129, a synchronous
buck-boost converter that delivers up to 200mA of continuous output current from a wide variety
of input sources including single or multiple-cell batteries as well as solar panels and supercaps.
Its 2.42V to 15V input range and 1.4V to 15.75V output range provide a regulated output with
inputs above, below or equal to the output. The low noise buck-boost topology incorporated in
the LTC3129 provides a continuous transition through all of the operating modes, making it ideal
for applications that must maintain a constant output voltage, even as the input source voltage
transitions through the output voltage. It also includes programmable maximum power point
control (MPPC) capability, ensuring maximum power extraction from nonideal power sources
such as photovoltaic cells.
Quiescent current of only 1.3µA makes the LTC3129 well suited for always on and
energy harvesting applications in which extended battery run time is of primary importance. The
LTC3129’s constant 1MHz switching frequency ensures low noise and high efficiency, while
minimizing the size of the external components. The combination of tiny externals and a 3mm x
3mm QFN or MSOP-16E package provides a very small solution footprint.
The LTC3129 includes four internal low RDSON N-channel MOSFETs to deliver
efficiencies of up to 95%. User selectable Burst Mode® operation lowers quiescent current to
only 1.3µA improving light load efficiency and extending battery run time. For noise sensitive
applications, Burst Mode operation can be disabled, offering low noise continuous switching.
15V, 200mA Synchronous Buck-Boost DC/DC Converter with Only
1.3µA of Quiescent Current
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Other features include a power good indicator, current-mode control, internal compensation
thermal shutdown and output disconnect.
The LTC3129-1 shares all of the features of the LTC3129, but offers eight fixed output
voltages from 2.5V to 15V. These outputs are user-programmable and eliminate the resistor
divider required on the adjustable version.
Both the LTC3129EUD and LTC3129EUD-1 are available in a 16-lead 3mm x 3mm
QFN package, whereas the LTC3129EMSE and LTC3129EMSE-1 are offered in a thermally
enhanced 16-lead MSOP package. Pricing starts at $2.95 each for both versions. Industrial grade
versions, the LTC3129IUD, LTC3129IUD-1, LTC3129IMSE and LTC3129IMSE-1, are
guaranteed to operate over the -40°C to 125°C operating junction temperature range and are
priced at $3.25 each. All pricing is based on 1,000-piece quantities and all versions are available
from stock. For more information, visit www.linear.com/product/LTC3129.
Photo Caption: 15V, 200mA Synchronous Buck-Boost Regulator
Summary of Features: LTC3129
Regulates VOUT Above, Below or Equal to VIN
Wide VIN Range: 2.42V to 15V, 1.92V to 15V After Start-Up (Bootstrapped)
Wide VOUT Range: 1.4V to 15.75V
200mA Output Current in Buck Mode
Single Inductor
1.3μA Quiescent Current
Programmable Maximum Power Point Control
1.2MHz Ultralow Noise PWM
Current Mode Control
Pin-Selectable Burst Mode Operation
Up to 95% Efficiency
Accurate RUN Pin Threshold
Power Good Indicator
10nA Shutdown Current
Thermally Enhanced 3mm × 3mm QFN & 16-Lead MSOP Packages
15V, 200mA Synchronous Buck-Boost DC/DC Converter with Only
1.3µA of Quiescent Current
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About Linear Technology
Linear Technology Corporation, a member of the S&P 500, has been designing, manufacturing
and marketing a broad line of high performance analog integrated circuits for major companies
worldwide for three decades. The Company’s products provide an essential bridge between our
analog world and the digital electronics in communications, networking, industrial, automotive,
computer, medical, instrumentation, consumer, and military and aerospace systems. Linear
Technology produces power management, data conversion, signal conditioning, RF and interface
ICs, µModule®subsystems, and wireless sensor network products. For more information, visit
, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode and µModule are registered trademarks of
Linear Technology Corp. All other trademarks are the property of their respective owners.
Press Contacts:
North America / Worldwide
UK & Nordic
John Hamburger, Director Marketing
[email protected]
Tel: 408-432-1900 ext 2419
Alan Timmins
[email protected]
Tel: +44-1-252-629937
Doug Dickinson, Media Relations Manager
[email protected]
Tel: 408-432-1900 ext 2233