New Industry Products

LTC Presents LT1933 PWM DC-DC Converter

August 08, 2004 by Jeff Shepard

Linear Technology Corp. (LTC, Milpitas, CA) announced its new LT1933, a current-mode, pulse-width modulated, step-down dc-dc converter with an internal 0.75 A power switch, packaged in a six-lead SOT-23. Its wide input range of 3.6 V to 36 V makes the LT1933 suitable for regulating power from a wide variety of sources, including automotive power systems, 24 V industrial supplies and unregulated wall adapters. Its 500 kHz operating frequency allows the use of low-cost inductors and ceramic capacitors, resulting in low, predictable output ripple.

The LT1933's low VCESAT (370 mV at 400 mA) 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 (<2 µA) 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.