2.5 A Step-Down Regulator Keeps EMC/EMI Emissions Low

Analog Devices, which recently acquired Linear Technology, has announced the LTM8065, a µModule (power module) step-down regulator with up to 40 V input voltage (42 V abs max), which can safely operate from unregulated or fluctuating 12 V to 36 V input supplies in noisy environments such as industrial robotics, test and measurement, medical, factory automation and avionics systems. The Silent Switcher architecture minimizes EMC/EMI emissions enabling the LTM8065 to pass CISPR 22 class B for use in noise-sensitive signal processing applications, including imaging and RF systems. The LTM8065’s small 6.25 mm x 6.25 mm x 2.32 mm BGA package includes a switching regulator controller, power switches, inductor and other supporting components. With only two 0805 sized capacitors and two 0603 sized resistors, the LTM8065’s solution occupies approximately 100mm², about half the size of equivalent power level module solutions.

LTM8065The LTM8065 can deliver 2.5 A of continuous (3.5 A peak) output current to a 5 V load from a 12 V input at up to 85°C ambient without a heat sink or airflow. The output voltage is adjustable with one resistor from 0.97 V to 18 V. This wide output voltage range provides versatility, using one product to generate common system bus voltage of 3.3 V, 5 V, 12 V and 15 V. The switching frequency is adjustable by an external single resistor or can be synchronized to an external clock from 200 kHz to 3 MHz. It enables customer operation of the device in or out of the specific frequency. The LTM8065 has four modes: Burst Mode® operation, pulse-skipping mode, pulse-skip mode with spread spectrum modulation and external synchronization mode. The quiescent current at burst mode is 8 µA, making it ideal for battery operating systems.

The LTM8065 operating temperature range is –40°C to 125°C. 1,000-piece pricing starts at $7.75 each.

Analog Devices – Linear Technology | www.linear.com

New Reflective Optical Sensor for Industrial and Medical Applications

TT Electronics recently introduced the Photologic V OPB9000, which is a reflective CMOS logic output sensor with programmable sensitivity, output polarity, and drain select. It provides dependable edge and presence detection of reflective media under a wide range of ambient light conditions. The OPB9000 is well suitable for a variety of applications, including industrial printing, dispensing, manufacturing automation, security devices, and portable medical equipment.TT Electronics TT058

The OPB9000’s features, benefits, and specs:

  • Programmable sensitivity, output polarity, and drain select
  • 25+ kilolux ambient light immunity along with a wide operating temperature range
  • The self-calibration feature avoids the need for constant recalibration as the LED ages, saving valuable time and effort.
  • Temperature compensation and automatic gain control features
  • 6-µs response time ensures high-speed detection for time-critical applications.
  • Fully integrated analog front end and digital interface
  • Combines an infrared emitter and integrated logic sensor in a 4.0 mm × 2.2 mm × 1.5 mm surface-mount package

Source: TT Electronics