March 25, 2008 -
Suited for handheld applications, Model LTC3670 includes 400 mA, 2.25 MHz synchronous buck regulator that delivers efficiencies of 93%, and two 150 mA LDOs that are adjustable down to 0.8 V. It has input voltage range of 2.5-5.5 V, and BurstModeŽ operation that minimizes quiescent current to 70 ľA in no load conditions. Other features include Power-Good pin, internal soft-start and compensation, reference accuracy of ą2.5%, current mode operation, and transient response.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
400mA, 2.25MHz Synchronous Step-Down DC/DC Converter with Dual 150mA LDOs in a 2mm x 3mm DFN
MILPITAS, CA - March 13, 2008 - Linear Technology announces the LTC3670, a 400mA, 2.25MHz, synchronous buck regulator and two 150mA LDOs packaged in a 2mm x 3mm DFN. The LTC3670's switching regulator and both LDOs are adjustable down to 0.8V, offering a very compact triple output converter for handheld applications. Its input voltage range of 2.5V to 5.5V makes it ideal for single cell Li-Ion powered applications. The adjustable outputs are ideal for powering I/O, memory and core voltages of the latest DSPs and microcontrollers while each channel offers an independent enable pin. The buck regulator's 2.25MHz switching frequency enables the utilization of tiny, low cost externals, providing a very compact solution footprint for handheld applications.
The LTC3670's synchronous buck delivers efficiencies as high as 93% and constant frequency, current mode operation minimizes noise while offering fast transient response. The internal LDOs require only 150mV of dropout voltage, providing two additional low noise outputs. The LTC3670's BurstModeŽ operation minimizes quiescent current to only 70ľA in no load conditions, maximizing battery run time. Other features include a Power-Good pin, internal soft-start and internal compensation.
The LTC3670 is available from stock in a 12-Lead 2mm x3mm DFN package. Pricing starts at $1.95 each in 1,000-piece quantities.
Summary of Features: LTC3670
Triple Output Supply from a Single 2.5V to 5.5V Input
400mA Synchronous Buck DC/DC Plus Dual 150mA
LDOs in One IC
Outputs Regulate Down to 0.8V
ą2.5% Reference Accuracy
Constant-Frequency 2.25MHz Operation
Burst ModeŽ Operation for High Efficiency at Light Loads;
IQ=70ľA, All Outputs Enabled
Independent Enable Pin for Each Output
Current Mode Operation for Excellent Line and Load
Transient Response
Internal Soft-Start for Each Output
Tiny 12-Lead 3mm x 2mm x 0.75mm DFN Package
Monolithic 400mA, 2.25MHz Buck Regulator with Dual 150mA LDOs in a 2mm x 3mm DFN
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
John Hamburger
Tel: (408) 432-1900 ext. 2419
jhamburger@linear.com
China (PRC)
Fanny Lau
Tel: 852-2428-0303
flau@linear.com
Japan
Kazuto Takahashi
Tel: 81-3-5226-7291
ktakahashi@linear.com
Contacts:
Public Relations:
Alan Timmins
INTL
Phone: +44-1-252-629937 E-mail this person
General Information:
John Hamburger
USA
Phone: 408-432-1900 ext 2419 E-mail this person Company Information: Name: Linear Technology Corp. Address: 1630 McCarthy Blvd. City: Milpitas State: CA ZIP: 95035-7417 Country: USA Phone: 408-432-1900 FAX: 408-434-6441 http://www.linear-tech.com
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