MAX77734 Delivers Flexible, Configurable Power Management Solution in a Compact 2.23 × 1.97mm Space


Mouser Electronics sells Maxim Integrated's MAX77734 PMIC. The MAX77734 PMIC is a compact product with ultra-low power consumption that helps wearable and hearable product designers extend the lifespan of lithium-ion batteries.



Maxim's MAX77734 PMIC sold by Mouser provides flexible and configurable power management solutions in a compact 2.23 × 1.97mm space. The PMIC integrates a linear-mode lithium-ion battery charger, LDO (low-dropout) linear regulator, analog multiplexer, and 2-channel current sink driver, offering the advantage of reduced external component count when designing products that operate on small batteries.

The charger is designed for small battery systems requiring accurate termination down to a minimum of 0.375mA. The charger's battery regulation voltage range (3.6~4.6V) is programmable to support various cell chemistries. Even when the battery is discharged, if the input source remains connected, the circuit can immediately regulate system voltage. The output of the 150mA LDO regulator is programmable via I2C in the 0.8~3.975V range, and the analog multiplexer operates with an external ADC (analog-to-digital converter) to convert battery voltage and current signals for battery state monitoring. The current sink can handle 12.8mA per sink, and LEDs can be programmed to blink in desired patterns.

The MAX77734 PMIC has a standby current of only 1.5µA and quiescent current of 4.5μA when the LDO regulator is operating. With numerous programmable options, it is suitable for battery-powered devices such as Bluetooth®-enabled headsets, fitness monitors, wearable cameras, and low-power IoT (Internet of Things) devices.

The MAX77734 PMIC is supported by the MAX77734 evaluation kit, and engineers can inspect the linear charger, regulator, multiplexer, and interface features using a Windows-based GUI.