DC to DC Power Supplies (Converters)
DC/DC Converter includes internal 1.45 A power switch.
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Press Release Summary:
Housed in 2 x 3 mm DFN package, 1 A Model LT3503 features input range of 3.6-20 V, making it suited for regulating power from variety of sources. Current mode, PWM, step-down converter provides 2.2 MHz fixed frequency operation and adjustable output down to 780 mV. Internal switch offers efficiencies up to 88%, maximizing battery run-time. Cycle-by-cycle current limit provides protection against shorted outputs, while soft-start eliminates input current surge during start-up.
Original Press Release:
2.2MHz, 1A (IOUT) 20V Step-Down DC/DC Converter in 2mm x 3mm DFN Package
MILPITAS, CA - November 20, 2006 - Linear Technology announces the LT3503, a current mode PWM step-down DC/DC converter with an internal 1.45A power switch, packaged in a tiny 6-lead 2mm x 3mm DFN package. Its wide input range of 3.6V to 20V makes the LT3503 ideal for regulating power from a wide variety of sources, including unregulated wall transformers, fixed 5V and 12V rails and lead acid batteries. Its 2.2MHz switching frequency enables the use of tiny, low cost inductors and ceramic capacitors, resulting in low, predictable output ripple.
The LT3503's low VCESAT (400mV @1A) internal switch offers efficiencies of up to 88%, maximizing battery run-time. An on-chip 0.78V reference enables sub 1V output voltages while internal compensation minimizes the solution footprint. Internal cycle-by-cycle current limit provides protection against shorted outputs while soft-start eliminates input current surge during start-up. The low current (<2uA) shutdown provides maximum run time in battery-powered systems.
The LT3503EDCB is available from stock in a thermally enhanced 2mm x 3mm DFN-6 package. Pricing starts at $2.25 each for 1,000-piece quantities.
Summary of Features: LT3503
Wide Input Range: 3.6V to 20V
5V at 1A from 7.2V to 18V Input
3.3V at 1A from 5.5V to 12V Input
Fixed Frequency Operation: 2.2MHz
Output Adjustable Down to 780mV
Short-Circuit Robust
Uses Tiny Capacitors and Inductors
Soft-Start
Internally Compensated
Low Shutdown Current: <2uA
SSOP-44 Package Low VCESAT Switch: 400mV at 1A
Thermally Enhanced, 2mm x 3mm 6-Pin DFN Low Profile Package
20V, 2.2MHz, 1A (IOUT) Buck Switching Regulator in 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, 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 and LTM are registered trademarks and SoftSpan is a trademark of Linear Technology Corp.
North America and General Information
John Hamburger
Tel: (408) 432-1900 ext. 2419
jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233
ddickinson@linear.com
