LTC Presents LTC3723 Synchronous PWM Controller
Linear Technology Corp. (LTC, Milpitas, CA), a manufacturer of high-performance integrated circuits, introduced the LTC3723 push-pull, synchronous pulse-width modulated (PWM) controller targeted towards isolated power supplies. The LTC3723 is suitable for converting high-voltage backplane (36 V to 72 V) rails to 12 V (distributed bus) and lower voltages at power levels between 100 W and 750 W.
The LTC3723 integrates two 1.5 A sink, 1 A source primary MOSFET drivers as well as two synchronous secondary outputs, resulting in operating efficiencies of 90 percent to 96 percent (a five-percent improvement over conventional, non-synchronous solutions). The LTC3723 is housed in a 16-lead SSOP package and can be used in applications such as industrial, automotive, avionics and telecom isolated power supplies. The LTC3723 also provides short-circuit and over-temperature protection.
The LTC3723 is offered in a current-mode (LTC3723-1) and voltage-mode (LTC3723-2) version. Both devices feature low startup and operating currents of 145 µA and 3 mA, respectively. The LTC3723-1 and LTC3723-2 are rated for operation from -40 °C to +85 °C. Pricing in 1,000-piece quantities starts at $4.55 each.
