Linear Technology : Dual (2.5A + 1.5A) Synchronous Step-Down DC/DC Converter Delivers 95% Efficiency & Operates from 3.4V to 42V Inputs

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MILPITAS, CA ­ May 12, 2015 ­ Linear Technology Corporation announces the LT8616, a 42V input capable, high efficiency dual synchronous monolithic step­down switching regulator. Its dual channel design delivers independent
2.5A and 1.5A continuous current to outputs as low as 0.8V. A dual channel synchronous rectification topology delivers up to 95% efficiency while Burst Mode® operation keeps quiescent current under 6.5µA (both channels
enabled) in no­load standby conditions, making it ideal for always­on systems. Switching frequency can be programmed from 200kHz to 3MHz and is synchronizable throughout this range.

The LT8616's 35ns minimum on­time
enables 16VIN to 1.8VOUT step­down conversions, while switching at 2MHz
helps designers avoid critical noise­ sensitive frequency bands, such as AM radio while having a very compact solution footprint. Its 3.4V to 42V input voltage
range makes it ideal for automotive applications which must regulate through cold­crank and stop­start scenarios with minimum input voltages as low as 3.4V and load dump transients in excess of 40V. Each channel of the LT8616 maintains a minimum dropout voltage of only 400mV (at1A) under all conditions, enabling it to excel in scenarios such as automotive cold­crank. The LT8616's 28­lead
thermally enhanced TSSOP package and high switching frequency keeps external inductors and capacitors small, providing a compact, thermally efficient footprint.
The LT8616 utilizes dual internal top and bottom high efficiency power switches with the necessary boost diodes, oscillator, control and logic circuitry integrated into a single die. Each channel switches 180 degrees out­of­phase to reduce output ripple. Each channel has a separate input for added design flexibility. Low ripple Burst Mode
operation maintains high efficiency at low output currents while keeping output ripple below 15mVP­P. Unique design techniques and a new high speed process enable high efficiency over a wide input voltage range, and the
LT8616's current­mode topology provides fast transient response and excellent loop stability. Other features include internal compensation, power good flags, output soft­start/tracking and thermal protection.
The LT8616 is available in a thermally enhanced 28­lead TSSOP package. Three temperature grades are available, with operation from ­40°C to 125°C (junction) for the extended (E) and industrial (I) grades and a high temperature (H) grade of ­40°C to 150°C. The 1,000 piece price starts at $4.15. All versions are available from stock. For more information, visit www.linear.com/product/LT8616.

Wide Input Voltage Range: 3.4V to 42V

2.5A and 1.5A Buck Regulators with

Separate Inputs

Fast Minimum Switch On­Time: 35ns

Ultralow Quiescent Current Burst Mode®

Operation:

6.5µA IQ Regulating 12VIN to

5VOUT and 3.3VOUT

Output Ripple

180° Out­of­Phase Switching

Adjustable and Synchronizable:

200kHz to 3MHz

Accurate 1V Enable Pin Thresholds

Internal Compensation

Output Soft­Start and Tracking TSSOP Package: Output Stays at or Below Regulation Voltage During Adjacent Pin Short or When a Pin Is Left Floating

Thermally Enhanced 28­Lead TSSOP Package

The USA list pricing shown is for budgetary use only. International prices may differ due to local duties, taxes, fees and exchange rates.

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.

John Hamburger
Tel: (408) 432­1900 ext. 2419 jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233 ddickinson@linear.com

Fanny Lau
Tel: 852­2428­0303 flau@linear.com
Angela Ao
Tel: (8610)6522 8081 angela.ao@ebacomms.com

Yoshikazu Funasaki Tel: 81­3­5226­7291 yfunasaki@linear.com
Takashi Matsuda
Tel: +81­3­3255­8411 linear@chugai­ad.co.jp

Ralf Stegmann
Tel: +49 (0) 7131 9234­11 ralf@ezwire.com

Clotilde Zeller
Tel: +33 1 4614 87 09 clotilde@ezwire.com

Desiree Park
Tel: +82­2­565­6625 desiree@ezwire.com

Alan Timmins
Tel: +44­1252­629937 alan@ezwire.com

Simona Labianca
Tel: +39 340 0571697 simona@ezwire.com

Alice Wang
Tel: + 886­2­28974705 alice@ezwire.com

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