DC to DC Power Supplies (Converters)
DC/DC Converter produces 3.3 V @ 1.4 A from 7-36 V input.
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Press Release Summary:
Supplied in 8-lead MSOP package, LT1936 current mode PWM step-down DC/DC converter has internal 1.9 A power switch, 3.6-36 V input range, and adjustable output down to 1.20 V. Soft-start eliminates input current surge during start-up, and 500 kHz operating frequency allows use of ceramic capacitors. Operating at efficiencies to 88%, converter integrates cycle-by-cycle current limit, which provides protection against shorted outputs.
Original Press Release:
500kHz, 1.4A (IOUT) 36V Step-Down DC/DC Converter in MSOP
MILPITAS, CA - April 19, 2005 - Linear Technology Corporation announces the LT1936, a current mode PWM step-down DC/DC converter with an internal 1.9A power switch, packaged in a tiny 8-lead thermally enhanced MSOP package. Its wide input range of 3.6V to 36V makes the LT1936 suitable for regulating power from a wide variety of sources, including unregulated wall transformers, 24V industrial supplies and automotive batteries. For automotive applications, the device can easily operate with sub 4V inputs, which is required for automotive "cold crank" conditions. Its 500kHz operating frequency allows the use of tiny, low cost inductors and ceramic capacitors, resulting in low, predictable output ripple.
The LT1936's low VCESAT (410mV @1.2A) internal switch ensures efficiencies as high as 88%, maximizing battery run-time. Cycle-by-cycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start up. A low current (<2uA) shutdown mode provides easy power management in battery-powered systems.
The LT1936EMS8E is available from stock in a thermally enhanced MSOP-10 package. A higher temperature grade "I" version, the LT1936IMS8E, is also available from stock. Pricing starts at $2.85 each and $3.42 each, respectively, for 1,000 piece quantities.
Summary of Features: LT1936
o Wide Input Range: 3.6V to 36V
o Short-Circuit Protected Over Full Input Range
o 1.9A Guaranteed Minimum Switch Current
o 3.3V at 1.4A from 7V to 36V Input
o Output Adjustable Down to 1.20V
o 500kHz Fixed Frequency Operation
o Soft-Start
o Uses Small Ceramic Capacitors
o Internal or External Compensation
o Low Shutdown Current: <2uA
o Thermally Enhanced 8-Lead MSOP Package
COMPANY BACKGROUND: Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. 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, contact:
Doug Dickinson, Media Relations Manager
Linear Technology Corporation
1630 McCarthy Boulevard
Milpitas, CA 95035-7417
ddickinson@linear.com
408-432-1900
Note: LT, LTC, and are registered trademarks of Linear Technology Corp.
