GD30WS8805EU

Features

 Extreme low quiescent current, <5uA in sleep mode

 Charging features

– Switching charging up to 1.2A maximum current programmable through ISET

– Support variety of battery chemistries, 4.1/4.2/4.3/4.35/4.4V @0.5%

– Full charge cycle: pre-charge, constant current and constant voltage

– Charging current and pre-charging current are all programmable through I2C

 Boost converter

– Support up to 600mA load current

– High efficiency synchronous boost converter @95%

– Output current limit programmable through I2C, 1.6A/1.8A/2.0A/2.2A

 Power path management

– Power path management allows simultaneous battery charging and system supply, 

system discharge priority

– When the system load increases, the charging current is reduced dynamically 

according to the input current and system voltage

– USB current limit programmable through I2C, 95%/100%/105%/110% @ICCCH + 

0.5A (Maximum current 3A)

– Over voltage protection up to 5.6V, VSYS voltage regulation limit: 4.6V

 Protection features

– Short Circuit Protection

– Over/Under temperature protection

– Input Over Voltage/Current Protection

– Boost over voltage (OV) during charge @5.5V

– Boost under voltage (UV) when charge/discharge @4.3V

 Additional features

– 3.3V LDO support 50mA

– Programmable LED driver

– Low external component count

– Simple I2C compatible interface

2 Applications

 TWS earbuds charging case

 Headsets and hearing aids

 Low battery applications such as smart watches and fitness accessories

 Patient monitors and portable medical equipment

General description

The GD30WS8805x is a highly integrated, programmable, low quiescent current power 

management integrated circuit (PMIC) that integrates the most common needs for wearables 

and low power battery applications.

The GD30WS8805x integrates a switching charger of programmable charging current (up to 

1.2A) and a synchronous boost converter at fixed 5V output. The IC also includes a 12-bit 

ADC for battery gauge monitoring, and a low quiescent current, low noise LDO capable of 

delivering 50mA load current.

The device integrates advanced power path management and control that allow the device 

to provide power to the system while charging the battery even with poor adapters. The 

dynamic power path management automatically balances the currents delivered to the 

system and battery charging. A high voltage and over current protection circuit is 

implemented in the IC to protect it from high input voltage as high as 20V.

The GD30WS8805x device supports charge current up to 1.2A and termination current down 

to 5mA. The maximum charge current is set at a default of 1.2A and is programmable by 

connecting an external resistor from ISET pin to ground. The battery is charged using a 

standard Li-Ion charge profile with three phases: pre-charge, constant current and constant 

voltage regulation.

The device has several power saving modes to increase battery life whether the product is in 

storage or in operation. The quiescent current could be as low as 5uA when it is in sleep

mode and thus most battery could sustain more than a year in shelf. 

The versatile features of GD30WS8805x allow for it to best used in wearable applications 

such as headsets, earbuds and hearing aids, or low battery applications such as smart 

watches and fitness accessories, or patient monitors and portable medical equipment.