Triple Synchronous Step-Down DC/DC Converter Delivers Independent 800mA Outputs from a 3mm x 3mm QFN
The LTC3545’s internal synchronous switches offer efficiencies as high as 95% while Burst Mode® operation minimizes quiescent current to only 58uA in no load conditions. For applications demanding the lowest possible noise, the LTC3545 can run in a pulse skipping mode to minimize output ripple. The LTC3545 offers Power Good indicators on two of its channels and is synchronizable to an external clock. The LTC3545-1 offers Power Good indicators on all three channels, but must always use Burst Mode operation. Both versions of the LTC3545 utilize low dropout 100% duty cycle operation to extend battery run-time. Each channel has independent enable pins, offering design flexibility.
The LTC3545EUD and LTC3545EUD-1 are both available from stock in 16-lead 3mm x 3mm QFN packages.
Summary of Features: LTC3545/-1
- Three 800mA Outputs
- High Efficiency: Up to 95%
- 2.25V to 5.5V Input Voltage Range
- Low Ripple (<20mVP-P) Burst Mode Operation, IQ = 58uA
- 2.25MHz Constant Frequency Operation or
- Synchronizable to External 1MHz to 3MHz Clock
- Power Good Indicators Ease Supply Sequencing
- 0.6V Reference Allows Low Output Voltages
- Current Mode Operation/Excellent Transient Response
- Low Profile 16-Lead 3mm × 3mm QFN Package
LINEAR TECHNOLOGY GmbH
Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, uModule(TM) products, and many other analog functions. Applications for Linear Technology's high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems. For more information, visit www.linear.com.
LT, LTC, LTM, Burst Mode and are registered trademarks and uModule is a trademark of Linear Technology Corp. All other trademarks are the property of their respective owners.
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