PMIC Integrates Ultra-Low IQ Voltage Regulators

Maxim’s MAX20345 power-management IC (PMIC) features ultra-low IQ voltage regulators, making it viable for low-power wearable applications. The device includes a linear battery charger with a smart power selector, several power-optimized peripherals. and features three buck regulators, three low-dropout (LDO) linear regulators, and a Buck-Boost regulator, providing up to seven regulated voltages, each with an ultra-low quiescent current. Two load switches allow disconnecting system peripherals to minimize the total quiescent load of the system. MAX20345 allows system designers to minimize power consumption and extend battery life in 24/7 operation devices, such as those in the wearable market.


The three synchronous, high-efficiency buck regulators use a pulse frequency modulated (PFM) control scheme for increased efficiency during light-load operation. The output voltage of these regulators can be programmed through I2C down to voltages as low as 0.7V. Additionally, the buck regulators support dynamic voltage scaling (DVS) allowing the system designer to further improve system power consumption when using devices that can take advantage of DVS.


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Each of the three LDO regulators output voltage can be programmed through I2C. For additional flexibility, each LDO can be configured as a load switch that can be used to disconnect the quiescent load of the system peripherals. The MAX20345 is available in a 56-bump, 0.4-mm pitch, 3.37 mm x 3.05 mm wafer-level package (WLP). For more insights, peruse the MAX20345 datasheet.