Buck Regulators have 300 kHz to 3 MHz switching frequency.
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Press Release Summary:
Operating from input voltage of 4.5-10 V, Series LTC3602 synchronous buck regulators can deliver up to 2.5 A of continuous output current at output voltages as low as 0.6 V, and are suited for dual cell Li-Ion applications. Model LTC3602EUF is available in 4 x 4 mm QFN-20, while Model LTC3602EFE is offered in 16-lead, thermally enhanced TSSOP package. Units use internal switches with RDS(ON)s of only 65 and 90 mW to deliver efficiencies as high as 95%.
Original Press Release:
10 V, 3 MHz, Synchronous Step-Down Regulator Delivers 2.5 A from a 4 mm x 4 mm QFN
MILPITAS, CA - March 12, 2008 - Linear Technology announces the LTC3602, a high efficiency, 3MHz synchronous buck regulator which uses a constant frequency, current mode architecture. It can deliver up to 2.5A of continuous output current at output voltages as low as 0.6V from a 4mm x 4mm QFN (or a thermally enhanced TSSOP-16) package. It operates from an input voltage of 4.5V to 10V, making it ideal for dual cell Li-Ion applications, as well as general purpose fixed rail systems. Its switching frequency is user programmable from 300kHz to 3MHz, enabling the utilization of tiny low cost capacitors and inductors.
The LTC3602 uses internal switches with RDS(ON)s of only 65mOhm and 90mOhm to deliver efficiencies as high as 95%. It also utilizes low dropout 99% duty cycle operation to allow output voltages very close to VIN. No load quiescent current is only 75µA and less than 1µA in shutdown, making it ideal for applications that demand maximum battery run-time. For applications that require the lowest noise possible, the LTC3602 can be configured to run in forced continuous operation reducing noise and potential RF interference. Additional features include a Power Good voltage monitor, external synchronization capability, and thermal protection.
The LTC3602EUF is available in a 4mm x 4mm QFN-20, and the LTC3602EFE is offered in a 16-lead, thermally enhanced TSSOP package. Pricing starts at $4.00 and $4.10 each, respectively, in 1,000-piece quantities. Industrial grade versions, the LTC3602IUF and LTC3602IFE are tested and guaranteed to operate from a -40°C to 125°C operating junction temperature and are priced at $4.70 and $4.80, respectively, in 1,000-piece quantities. All versions are available from stock.
Summary of Features: LTC3602
Wide Input Voltage Range: 4.5V to 10V
2.5A Output Current
Low RDS(ON) Internal Switches: 65mOhm and 90mOhm
Programmable Frequency: 300kHz to 3MHz
Low Quiescent Current: 75µA
0.6V ±1% Reference Allows Low Output Voltage
99% Maximum Duty Cycle
Adjustable Burst Mode® Threshold
Synchronizable to an External Clock
Power Good Output Voltage Monitor
Overtemperature Protection
Available in 16-Lead Exposed TSSOP and 4mm - 4mm QFN-20 Packages
2.5A, 10V Synchronous Step-Down DC/DC Converter in 4x4 QFN
About Linear Technology
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.
Worldwide Contacts
North America and General Information
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Tel: (408) 432-1900 ext. 2419
jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233
ddickinson@linear.com
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Fanny Lau
Tel: 852-2428-0303
flau@linear.com
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Kazuto Takahashi
Tel: 81-3-5226-7291
ktakahashi@linear.com
