3A, 4MHz, Synchronous Step-Down Regulator in 3mm x 4mm QFN Now Offered in High Reliability H Grade & Military MP Grade to +150°C

News Release  www.linear.com
3A, 4MHz, Synchronous Step-Down Regulator in 3mm x 4mm QFN
Now Offered in High Reliability H Grade & Military MP Grade to +150°C
MILPITAS, CA – January 29, 2014 – Linear Technology announces new high reliability H grade
and military MP grade versions of the LTC3612, a high efficiency, 4MHz synchronous buck
regulator that incorporates a constant frequency, current mode architecture. The device can
deliver up to 3A of continuous output current at output voltages as low as 0.6V from a 3mm x
4mm QFN or a thermally enhanced TSSOP-20 package. The LTC3612 operates from an input
voltage of 2.25V to 5.5V, making it ideal for single cell Li-Ion applications as well as 3.3V or 5V
intermediate bus systems. Its switching frequency is user programmable from 300kHz to 4MHz,
enabling the use of tiny, low cost capacitors and inductors.
The LTC3612 uses internal switches with RDS(ON) of only 45mOhms and 70mOhms to
deliver efficiencies of over 90% for high step-down ratio applications, such as 5VIN to 1.8VOUT
conversions. Burst Mode® operation is used to maximize light load efficiency, requiring only
70µA at no load, making it well suited for applications demanding maximum battery run time.
An adjustable Burst Mode clamp enables designers to further optimize light load efficiency. For
applications that require the lowest possible noise, the LTC3612 can be configured to run in
either pulse-skipping or forced continuous modes, reducing noise and potential RF interference.
The LTC3612 also offers inputs for tracking capability as well as a DDR memory mode which
can source/sink +1.5A. Additional features include optional active voltage positioning, a Power
Good voltage monitor, external synchronization capability and thermal protection.
3A, 4MHz, Synchronous Step-Down Regulator in 3mm x 4mm QFN
Now Offered in High Reliability H Grade & Military MP Grade to +150°C
page 2
The high reliability H grade versions are guaranteed to meet specifications over the -40°C
to 150°C operating junction temperature range. The LTC3612HUDC is available in a 3mm x
4mm QFN-20, and the LTC3612HFE is offered in a 20-lead, thermally enhanced TSSOP
package. Pricing starts at $3.95 and $4.15 each, respectively in 1,000-piece quantities. The
military MP grade versions, the LTC3612MPUDC in QFN and LTC3612MPFE in TSSOP, are
guaranteed to meet specifications over the -55°C to 150°C operating junction temperature range
and are priced at $9.85 and $10.40 each, respectively in 1,000-piece quantities. All versions are
available from stock. For more information, visit www.linear.com/product/LTC3612
Photo Caption: 3A, 4MHz Synchronous Step-Down DC/DC Converter in 3mm x 4mm QFN &
TSSOP
Summary of Features: LTC3612
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-55°C to +150°C Operation (MP Grade), -40°C to +150°C Operation (H Grade)
3A Output Current
2.25V to 5.5V Input Voltage Range
Low Output Ripple Burst Mode® Operation: IQ = 70µA
+ 1% Output Voltage Accuracy
Output Voltage Down to 0.6V
High Efficiency: Up to 95%
Low Dropout Operation: 100% Duty Cycle
Shutdown Current: ≤1µA
Adjustable Switching Frequency: Up to 4MHz
Optional Active Voltage Positioning (AVP) with Internal Compensation
Selectable Pulse-Skipping/Forced Continuous/Burst Mode Operation with Adjustable Burst Clamp
Programmable Soft-Start
Inputs for Start-Up Tracking or External Reference
DDR Memory Mode, IOUT = + 1.5A
Available in 20-Lead (3mm × 4mm) QFN & 20-Lead TSSOP Thermally Enhanced Packages
3A, 4MHz, Synchronous Step-Down Regulator in 3mm x 4mm QFN
Now Offered in High Reliability H Grade & Military MP Grade to +150°C
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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 over 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 www.linear.com
, 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
Communications
[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
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