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Configurable PMIC touts advanced power architecture

Posted: 18 Mar 2015 ?? ?Print Version ?Bookmark and Share

Keywords:Power management IC?

Micrel introduced a family of integrated power management IC (PMIC) solutions, the MIC7400 and MIC7401.

The MIC7400 and MIC7401 feature six independent DC/DC regulators and are available in a compact 4.5mm x 4.5mm FQFN package. The devices utilise five independent 3A synchronous buck converters, an independent 200mA non-synchronous boost converter, programmable features, and are targeted at SSDs and Internet-of-Things (IoT) devices. They are now available in volume quantities with 10,000 quantity pricing that starts at $4.09.

"End product design requirements continue to change with power requirements varying during product development while there is constant pressure on product designers to reduce board space," noted Brian Hedayati, vice president of marketing for high performance linear and power solutions at Micrel. "Micrel's configurable PMIC provides a flexible solution that allows instantaneous adjustments for requirement changes thereby reducing design cycle time and time to market. The MIC7400 and MIC7401 power architecture allows designers to enhance system efficiency across a range of power modes."

The devices are configurable via an I2C interface and an internal EEPROM. These configurable power management devices offer dynamic output voltage scaling, normal and standby modes, and start-up power sequencing order and delays.

Utilising only 200?A of quiescent current in normal mode, the MIC7400 and MIC7401 also has a low power standby mode of operation that provides flexibility to reduce the quiescent current by decreasing output voltage or completely turning off any individual output. This feature further optimises efficiency in sleep/hibernate states and prolongs operating life in sensitive lower power applications.

The combination of power density and feature flexibility, in addition to superior fast transient response and light load performance, results in an efficiency-optimised high-density solution for space constrained applications while reducing design cycle time.

The device is accompanied by a simple and intuitive graphical user interface (GUI) tool to aid in the configuration and monitoring. The MIC7400 and MIC7401 operate from a 2.4V to 5.5V input and can provide an output of 0.8V to 3.3V for the buck regulators with 1.5 per cent output accuracy over line/load and temperature. The integrated boost regulator is capable of regulating output voltages from 7V to 14V.

Other configurable features include soft-start rise/fall times, current limit, output active discharge in-addition to the threshold and delay for the integrated power-on-reset circuitry. The MIC7400 and MIC7401 are specified with a junction temperature range of -40C to 125C.

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