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Configurable, high efficiency PMIC for GPS sub-systems in wearable devices requiring ultra-low voltage ripple


Nanopower PMIC with ultra-low ripple buck regulator for low power connected devices

DA9233 is a high efficiency, ultra-low quiescent current buck regulator and ultra-low quiescent current LDO in a compact I2C configurable WLCSP package. The Buck regulator also features ultralow output ripple (<10mV). It is targeting battery powered applications needing low ripple and highly efficient power supplies.

The buck regulator extends high light load efficiency down to 20 μA further extending battery life. Dynamic Voltage Control in the Buck regulator facilitates optimization across the system power modes enabling further improvement in System efficiency and battery life.

The low quiescent current LDO can be configured as a Load Switch and provides the second supply output. The LDO’s uncommitted inputs can be connected to either the battery or the buck output. Connecting the input to the buck output provides the flexibility to improve the PSRR at the LDO output as needed.

DA9233 provides multiple protection features and comes with the ability to monitor the events and indicators in the GPO pin. 

Lifecycle status

● Active


2.5V - 5.5V operating range

750 nA total input current (buck enabled, no load)

Up to 80% efficiency at 1.8 V output, 20 μA load currents

Output voltage 0.6 V to 1.9 V

Dynamic Voltage Control (DVC)

100 mA LDO/Load Switch

Ultra-low quiescent current

Input voltage 1.8 V to 5.5 V

Output voltage 0.7 V to 3.3 V

I2C interface for device configuration and control

Protection features and System Monitors


<10mV output ripple exceeds requirements for powering GPS chipsets in wearable devices 

Low quiescent current PMIC extends battery life

Integration of buck regulator and LDO reduces board area while providing total solution for GPS chipsets

Dynamically programmable output voltage optimizes performance in operating modes and extends battery life in storage modes


Fitness Trackers


Wireless Headphones

Portable Medical

Personal Health Monitors

Portable Gaming

Wireless Earbud Cradles

Home Automation


WL-CSP 12 (1.65 x 1.25 x 0.5mm)

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Name Date Version
DA9233 Datasheet (886.01 KB) 22/01/2019 2.0
Application notes
Name Date Version
Shared IRQ Line Considerations AN-PM-059 (329.06 KB) 24/06/2016 1.2
Software Resources
Name Date Version
DA923x GUI (78.22 MB) (Registered users only) 05/09/2020 17