Page 48

EETE JAN 2015

Step-down micromodule regulator minimises board space LTM4625 is a 5A, 20 VIN step-down μModule (micromodule) regulator in a 6.25 x 6.25 x 5.01 mm BGA package which, with a few passive components, fits into 0.5cm² on a double-sided PCB. Like other μModule regulators, the LTM4625 includes the DC/DC controller, power switches, inductor and compensation components in a single package. Two external ceramic capacitors (1206 case size) and a resistor (0603 case size) are required for operation. The LTM4625 operates from a 4V to 20V input supply, delivering a regulated output adjustable between 0.6V to 5.5V with ±1.5% accuracy over line, load and temperature. LTM4625 operates at a user-adjustable switching frequency from 800 kHz to 4 MHz or can be synchronised to an external clock from 700 kHz to over 1.3 MHz. The module also provides a clock-out signal at the same frequency with selectable phase shift (90°, 120° or 180°), for current sharing multiple LTM4625 modules for higher output current. With the addition of an external bias supply above 4V, the LTM4625 can operate from an input voltage as low as 2.375V. Output overvoltage, overcurrent and overtemperature fault protection are included in the regulator. The LTM4625 is available with guaranteed operation over the -40°C to 125°C internal temperature range. Linear Technology www.linear.com Integrated runtime analysis for ARM finds errors in running code IAR Systems is promoting its runtime analysis add-on product C-RUN by marking 30,000 evaluation downloads – which the company interprets as revealing significant need in the user base for such a combination. The add-on is integrated with the complete IAR Embedded Workbench for ARM development toolchain. C-RUN is sold as an add-on product and performs runtime analysis by monitoring application execution directly within IAR Embedded Workbench. Developers can make runtime analysis a natural part of the day-to-day workflow. No additional applications or integrations are needed. Runtime analysis can find real and potential errors in the code while executing the program. To do this, the analysis needs to insert test code into the application. In C-RUN, analysis instrumentation is performed completely integrated in the build chain. This reduces memory requirements and execution speed penalty to a minimum, enabling efficient testing on actual hardware. Runtime analysis helps find vulnerabilities early in the product development process. IAR adds that the product comes with flexible settings to enable single or multiple checks in each test run. Developers can select the desired checks, rebuild their project and run it in the debugger. C-RUN will give direct feedback on what went wrong and where. IAR Embedded Workbench for ARM is a compiler and debugger toolchain that incorporates a compiler, an assembler, a linker and a debugger into one completely integrated development environment. C-RUN is available as an add-on product to version 7.20 or later of IAR Embedded Workbench for ARM. IAR Systems www.iar.com/crun Low resistance 10A power switch has accurate current sensing built-in Silego Technology’s 2.0 x 3.0 mm CurrentPAK SLG6M6001V enables high accuracy current measurement in a configurable and programmable 10A, 3.8 mΩ RDS(ON) load switch. CurrentPAK is a family of configurable mixed-signal ICs, or CMICs. A high performance load switch that has efficient, high accuracy current measurement, CurrentPAK is claimed as the first load switch to have advanced programmable features. Using non-volatile memory (NVM), designers can control several aspects of the device including enable logic, slew rate, current limiting, over-temperature protection, and integrated discharge rate. “The ability to measure instantaneous power consumption is a given in today’s high performance computation and telecommunications equipment,” said John McDonald, VP of Marketing. McDonald continued, “The designers of these systems need to provide a mechanism to report current consumption for intelligent power and thermal management. Typically, designers will use an external sense resistor to measure current consumption. This has the unfortunate side effect of significantly decreasing system power efficiency. Using CurrentPAK in this same application, the current sense resistor and other external components are eliminated, thereby reducing cost and making CurrentPAK the highest efficiency solution in its class.” The first device in the CurrentPAK family, the SLG6M6001V, has a current rating of 10A continuous, an ultra-low RDS(ON) value (3.8 mΩ), and comes in a 2.0 x 3.0 mm, fully encapsulated, plastic package. Silego Technology www.silego.com Barely-visible discrete transistors reduce PCB space Claimed as the first DFN0606-packaged NPN and PNP transistors, and occupying a board space of 0.36 mm², the transistors are 40% smaller than directly competing DFN1006 (SOT883) parts and deliver the same or better electrical performance. With an off-board height of 0.4 mm, they are suited for wearable technology as well as other spaceconstrained consumer products. Diodes Incorporated’s initial DFN0606 bipolar transistor offerings are two NPN and PNP devices with power dissipation up to 830 mW. The 40V-rated MMBT3904FZ and MMBT3906FZ boost power density and also provide a 200 mA collector current; while the 45V-rated BC847BFZ and BC857BFZ provide a collector current of 100 mA. All devices switch on at a base-emitter voltage of less than 1V, enabling them to be fully turned on under conditions of very low portable power. Diodes Inc www.diodes.com 48 Electronic Engineering Times Europe January 2015 www.electronics-eetimes.com


EETE JAN 2015
To see the actual publication please follow the link above