60-V, 3-A ‘Silent Switcher’ regulator is CISPR 22 Class B-compliant
Milpitas, CA, and Norwood, MA. Analog Devices Inc., which recently acquired Linear Technology Corp., has announced the LTM8073, a µModule (power module) step-down regulator with up to 60-V input voltage range (65-V max). The device can safely operate from unregulated or fluctuating 24-V to 48-V input supplies in noisy environments such as communication infrastructure, factory automation, industrial robotics, and avionics systems. The trademarked Silent Switcher architecture minimizes EMC/EMI emissions, enabling the LTM8073 to pass CISPR 22 Class B for use in signal-processing applications, including imaging and RF systems.
The output voltage is adjustable with one resistor from 0.8 V to 15 V. This
wide output voltage range provides the versatility of using one product to generate common system bus voltages of 3.3 V, 5 V, 12 V, and 15 V. The efficiency at 24 VIN to 5 VOUT at 3 A is 90%. The LTM8073 delivers 3 A of output current up to 85°C ambient without a heat sink or airflow. The device features a SHARE pin for current sharing, so it can operate in parallel to deliver more current.
The LTM8073 houses a switching regulator controller, power switches, inductor, and other supporting components in a 6.25-mm x 9-mm x 3.32-mm BGA package. Only the bulk input and output capacitors and a few small resistors are required to complete the design. The switching frequency is adjustable by an external single resistor or can be synchronized to an external clock from 200 kHz to 3 MHz. The LTM8073 has four operating modes: Burst Mode operation, pulse-skipping mode, pulse-skipping mode with spread spectrum, and external sync mode.
The LTM8073 operating temperature range is –40°C to 125°C. 1,000-piece pricing starts at $10.58 each.
