Milpitas, Calif. – Linear Technology has introduced its LT3669 IO-Link PHY compatible (COM1/COM2/COM3) industrial transceiver that integrates a high efficiency step-down regulator and a low dropout linear regulator. The device offers cable interface protection to ±60V. Other key features of the IO-Link transceiver include wake-up detect functionality and a programmable power-on reset timer for system reliability.
The LT3669/-2 operates from a 7.5V to 40V input voltage range, making it suited for industrial sensor applications. The LT3669’s internal switching regulator can deliver up to 100 mA of load current, while the LT3669-2 delivers up to 300 mA. Both versions can deliver high efficiency at output voltages from 0.8V to 16V.
The integrated LDO, powered from the switcher output, provides an additional output to offer greater design flexibility while maintaining high efficiency, said Linear. Both versions feature constant frequency/synchronizable operation with programmable switching frequencies between 250 kHz and 2.2 MHz. This enables the use of tiny external components, which combined with the 4mm x 5mm QFN-28, offer a compact solution footprint for industrial IO-Link sensor applications, said Linear.
The LT3669/-2 features rugged line drivers with adjustable slew rates and current limit which are externally adjustable to optimize EMC performance. The line drivers can source/sink up to 250 mA of current each or 500 mA when connected together, with a minimal residual voltage of less than 2.1V. An adaptive line driver pulsing scheme safely switches heavy loads. The drivers are easily configurable as push-pull, pull-up or pull-down to maximize system flexibility, according to the company. Other features include current limit detection and thermal shutdown.
Availability: The LT3669EUFD and LT3669EUFD-2 are both available from stock in a 28-pin thermally enhanced 4mm x 5mm QFN package. All versions are available from stock.
Pricing: Starts at $3.55 each in quantities of 1,000. Industrial grade versions, the LT3669IUFD and LT3669IUFD-2, are guaranteed to operate over the -40°C to +125°C operating junction temperature range and the high temperature grade versions, the LT3669HUFD and LT3669HUFD-2 are guaranteed to operate over -40°C to +150°C.