DC to DC Power Supplies (Converters)
Step-Down DC/DC Converter targets automotive applications.
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Press Release Summary:
Housed in 3 x 3 mm DFN or MSOP package, 2 A Model LT1912 features input voltage range of 3.6-36 V, making it suited for load dump and cold-crank conditions found in automotive applications. Device's 3.2 A internal switch delivers up to 2 A of continuous output current to voltages as low as .079 V. Operating from -40 to 125°C, converter delivers 0.79-20 V with user-programmable switching frequency from 200-500 kHz. Unit includes both power good flag and soft-start capability.
Original Press Release:
36V, 2A(IOUT), 500kHz Step-Down DC/DC Converter in 3mm x 3mm DFN
MILPITAS, CA - January 22, 2008 - Linear Technology Corporation announces the LT1912, a 2A, 36V step-down switching regulator packaged in a 3mm x 3mm DFN (or MSOP-10E). The LT1912's 3.6V to 36V input voltage range makes it ideal for load dump and cold-crank conditions found in automotive applications. Its 3.2A internal switch can deliver up to 2A of continuous output current to voltages as low as 0.79V. Switching frequency is
user-programmable from 200kHz to 500kHz, optimizing efficiency while keeping external components small. The combination of its 3mm x 3mm DFN-10 package (or thermally enhanced MSOP-10E) and tiny externals provide a very compact, thermally efficient footprint.
The LT1912 utilizes a high efficiency 3.2A, 0.25Ohm switch, with the necessary boost diode, oscillator, control and logic circuitry integrated on-chip. Special design techniques and a new high voltage process enable high efficiency over a wide input voltage range while the LT1912's current mode topology enables fast transient response and excellent loop stability. Other features include external synchronization (from 250kHz to 500kHz), a power good flag and soft-start capability.
The LT1912EDD and LT1912EMSE are priced starting at $2.95 each and $3.05 each, respectively, for 1,000-piece quantities. The LT1912IDD and LT1912IMSE, tested and guaranteed to operate from a -40°C to 125°C operating junction temperature, are priced at $3.54 and $3.66 each, respectively in 1,000-piece quantities. All versions are available from stock.
Summary of Features: LT1912
o Wide Input Range: Operation From 3.6V to 36V
o 2A Maximum Output Current
o Adjustable Switching Frequency: 200kHz to 500kHz
o Low Shutdown Current: ISD < 1uA
o Integrated Boost Diode
o Synchronizable Between 250kHz to 500kHz
o Saturating Switch Design: 0.25ohm On-Resistance
o 0.790V Feedback Reference Voltage
o Output Voltage: 0.79V to 20V
o Soft-Start Capability
o Small 10-Pin Thermally Enhanced MSOP & 3mm × 3mm DFN Packages
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.
LT, LTC, LTM and are registered trademarks and uModule is a trademark of Linear Technology Corp.
John Hamburger, Director Marketing Communications
jhamburger@linear.com
Tel: 408-432-1900 ext 2419
Doug Dickinson, Media Relations Manager
ddickinson@linear.com
Tel: 408-432-1900 ext 2233
