ADM00812

The MIC7401 is a powerful, highly-integrated, configurable, power-management IC (PMIC) featuring five synchronous buck regulators, one boost regulator, and high-speed I2C interface with an internal EEPROM. The device offers two distinct modes of operation “standby mode” and “normal mode” intended to provide an energy optimized solution suitable for portable handheld, and infotainment applications. In normal mode, the programmable switching converters can be configured to support a variety of features, including start-up sequencing, timing, soft-start ramp, output voltage levels, current-limit levels, and output discharge for each channel. In stand-by mode the PMIC can configured in a low power state by either disabling an output or by changing the output voltage to a lower level. Independent exit from stand-by mode can be achieved either by I2C communication or the external STBY pin. The device has five synchronous buck regulators with high-speed adaptive on-time control supporting even the challenging ultra-fast transient requirement for core supplies. The one boost regulator provides a flash-memory programming supply that delivers up to 200mA of output current. The boost is equipped with an output disconnect switch that opens if a short-to-ground fault is detected. An internal EEPROM enables a single-chip solution across many platforms by allowing the designer to customize the PMIC for their design. Modifications can be made without the need to re-approve a new PMIC, saving valuable design resources and time. All switchers provide light-load efficiency with HyperLight Load® mode for buck and PFM mode for boost. An additional benefit of this proprietary architecture is very-low output ripple voltage throughout the entire load range with the use of small output capacitors. The MIC7401 is designed for use with a small inductors (down to 0.47µH for buck, 1.5µH for boost), and an output capacitor as small as 10µF for buck, enabling a total solution size of 12mm × 8.5mm

Input voltage: 2.4V to 5.5V Five independent synchronous bucks up to 3A One independent non-synchronous boost 200mA 200µA quiescent current (all regulators on) 5µA typical shutdown current 93% peak buck efficiency, 85% typical efficiency at 1mA Dual power mode: stand-by and normal mode I²C interface up to 3.4MHz 23µA buck typical quiescent current 70µA boost typical quiescent current 1.5% output accuracy over temperature/line/load 2.0MHz boost switching frequency 1.3MHz buck operation in continuous mode Ultra-fast buck transient response 12mm × 8.5mm × 1.25mm solution size (top layer) Thermal-shutdown and current-limit protection 36-pin 4.5mm × 4.5mm × 0.85mm FQFN package (0.4mm pitch) -40°C to +125°C junction temperature range