DC to DC Power Supplies (Converters)
DC/DC Converter features 500 kHz operating frequency.
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Press Release Summary:
Housed in 6-lead SOT-23 package, Model LT1933 step-down converter includes internal 0.75 A power switch providing efficiencies as high as 88%. Input range of 3.6-36 V makes unit suitable for regulating power from wide variety of sources. Cycle-by-cycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start up. Low current shutdown of less than 2 µA provides power management in battery-powered systems.
Original Press Release:
500kHz, 500mA (IOUT) 36V Step-Down DC/DC Converter in ThinSOT
MILPITAS, CA - August 9, 2004 - Linear Technology Corporation announces the LT1933, a current mode PWM step-down DC/DC converter with an internal 0.75A power switch, packaged in a tiny 6-lead SOT-23. Its wide input range of 3.6V to 36V makes the LT1933 suitable for regulating power from a wide variety of sources, including automotive power systems, 24V industrial supplies and unregulated wall adapters. Its 500kHz operating frequency allows the use of tiny, low cost inductors and ceramic capacitors, resulting in low, predictable output ripple.
The LT1933's low VCESAT (370mV @400mA) internal switch provides 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. The low current (<2uA) shutdown provides easy power management in battery-powered systems.
The LT1933ES6 is available from stock in a ThinSOT package. Pricing starts at $2.20 each for 1,000-piece quantities.
Summary of Features: LT1933
750mA, 36V Internal Switch
500kHz Switching Frequency
Wide Input Range: 3.6V to 36V
Low VCESAT Switch: 370mV at 400mA
Uses Small Surface Mount Components
Low Shutdown Current: <2mA
Low Profile (1mm) SOT-23 (ThinSOT(TM)) 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.
Note: LT, LTC and are registered trademarks and ThinSOT is a trademark of Linear Technology Corp.
