MAX20335AEWX+ Analog Devices

Click here for production status of specific part numbers. MAX20335 PMIC with Ultra-Low I Voltage Regulators and Q Battery Chargers for Small Lithium Ion Systems General Description Benefits and Features The MAX20335 is a battery-charge-management solution Extend System Use Time Between Battery Charging ideal for low-power wearable applications. The device Dual Ultra-Low-I 200mA Buck Regulators Q includes a linear battery charger with a smart power Output Programmable from 0.7V to 2.275V and 0.7V to 3.85V selector and several power-optimized peripherals. The MAX20335 features two ultra-low quiescent current buck 0.9A (typ) Quiescent Current (Buck 1) Optional Fixed Peak-Current Mode to Optimize regulators and three ultra-low quiescent current low-dropout (LDO) linear regulators, providing up to five regulated Ripple Frequency in Noise-Sensitive Applications Three Ultra-Low-I 100mA LDOs voltages, each with an ultra-low quiescent current, allows Q LDO1 designers to minimize power consumption and extend Output Programmable from 0.8V to 3.6V battery life in 24/7 operation devices, such as those in the 0.6A (typ) Quiescent Current wearable market. 2.7V to 5.5V Input with Dedicated Pin The battery charger features a smart power selector that LDO2/3 allows operation on a dead battery when connected to a Output Programmable from 0.9V to 4V power source. To avoid overloading a power adapter, the 1A (typ) Quiescent Current input current to the smart power selector is limited based 1.71V to 5.5V Input with Dedicated Pin 2 on an I C register setting. If the charger power source Easy-to-Implement Li+ Battery Charging is unable to supply the entire system load, the smart Smart Power Selector power control circuit supplements the system load with 28V/-5.5V Tolerant Input current from the battery. The charger also supports Thermistor Monitor temperature dependent charge currents. Minimize Solution Footprint Through High Integration The two synchronous, high-efficiency step-down buck Provides Five Regulated Voltage Rails regulators feature a variable frequency mode for increased Switch Mode Option on Each LDO efficiency during light-load operation. The output voltage Optimize System Control 2 of these regulators can be programmed through I C Monitors Pushbutton for Ultra-Low Power Mode with the default preconfigured. The buck regulators can Power-On Reset Delay and Voltage Sequencing support dynamic voltage scaling to further improve On-Chip Voltage Monitor Multiplexer system power consumption. Applications The three configurable LDOs each have a dedicated Wearable Electronics input pin. Each LDO regulator output voltage can be Fitness Monitors 2 programmed through I C with the default preconfigured. Rechargeable IoT devices The linear regulators can also be configured to operate as power switches that may be used to disconnect the quiescent load of the system peripherals. The MAX20335 features a programmable power controller that allows the device to be configured for applications Ordering Information appears at end of data sheet. that require the device be in a true-off, or always-on, state. The controller also provides a delayed reset signal and voltage sequencing. The MAX20335 is available in a 36-bump, 0.4mm pitch, 2.72mm x 2.47mm wafer-level package (WLP). 19-100288 Rev 6 6/21MAX20335 PMIC with Ultra-Low I Voltage Regulators and Q Battery Chargers for Small Lithium Ion Systems TABLE OF CONTENTS General Description ............................................................................ 1 Benefits and Features .......................................................................... 1 Applications .................................................................................. 1 Typical Application Circuit ....................................................................... 5 Absolute Maximum Ratings ...................................................................... 6 Package Information ........................................................................... 6 Electrical Characteristics ........................................................................ 7 Typical Operating Characteristics ................................................................ 22 Bump Configuration ........................................................................... 25 Bump Description............................................................................. 25 Block Diagram ............................................................................... 27 Detailed Description........................................................................... 27 Power Regulation . 27 Power On/Off and Reset Control . 27 Power Sequencing 30 Smart Power Selector 31 Thermal Current Regulation . 31 System Load Switch . 32 Input Limiter . 32 Fast-Charge Current Setting . 33 Thermistor Monitoring with Charger Shutdown 33 2 I C Interface . 35 2 I C Addresses 35 Thermistor Monitoring with Charger Shutdown 36 2 I C Interface................................................................................. 38 Start, Stop, And Repeated Start Conditions 38 Slave Address . 38 Bit Transfer 38 Single-Byte Write . 38 Burst Write 39 Single Byte Read . 39 Burst Read 40 Acknowledge Bits . 40 2 I C Register Map ..............................................................................41 2 I C Register Descriptions....................................................................... 43 Maxim Integrated 2 www.maximintegrated.com