Two version transceiver for industrial sensing
Published: 4 August 2014 - Michelle Winny
An IO-Link PHY compatible (COM1/COM2/COM3) industrial transceiver that includes a high efficiency step-down regulator and a low dropout linear regulator has been released by Linear Technology Corporation. The device offers cable interface protection to ±60V. Wake-up detect functionality as well as a programmable poweron reset timer are included for system reliability.
The LT3669/-2 operates from a 7.5V to 40V input voltage range, making it ideal for industrial sensor applications. The LT3669’s internal switching regulator can deliver up to 100mA of load current, whereas the LT3669-2 delivers up to 300mA. 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 additional design flexibility while maintaining high efficiency.
Both versions feature constant frequency/synchronisable operation with programmable switching frequencies between 250kHz and 2.2MHz. This enables the use of tiny externals, which combined with the 4mm by 5mm QFN-28, offer a highly compact solution footprint for industrial IO-Link sensor applications.
The LT3669/-2 feature rugged line drivers with adjustable slew rates and current limit.
Linear Technology Corporation