Analog Devices / Maxim Integrated MAX20335 Wearable Charge Management PMIC
Analog Devices MAX20335 Wearable Charge Management PMIC consists of a linear battery charger with a smart power selector and power-optimized peripherals. This MAX20335 PMIC features two ultra-low quiescent current buck regulators and three ultra-low quiescent current Low-Dropout (LDO) linear regulators. These regulators provide up to five regulated voltages, each with an ultra-low quiescent current for minimizing power consumption and extending battery life in 24/7 operation devices. The linear battery charger consists of a smart power selector that supports operation on a dead battery when connected to a power source.
The Analog Devices MAX20335 PMIC includes a programmable power controller that can configure the device to be true-off or always on as per the application requirement. This power controller also provides a delayed reset signal and voltage sequencing. The MAX20335 PMIC is available in a 36-bump (0.4mm pitch, 2.72mm x 2.47mm) Wafer-Level Package (WLP). This MAX20335 charge-management solution is designed for low-power wearable electronic applications such as fitness monitors and rechargeable IoT devices.
Features
- Extend system use time between battery charging
- Dual ultra-low-IQ 200mA buck regulators
- Output programmable from 0.8V to 2.375V and 0.8V to 3.95V
- 0.9μA Quiescent current (typical) - Buck 1
- Optional fixed peak-current mode to optimize ripple frequency in noise-sensitive applications
- Three ultra-low-IQ 100mA LDOs:
- LDO1:
- 0.8V to 3.6V programmable output
- 0.6μA quiescent current (typical)
- 2.7V to 5.5V input with a dedicated pin
- LDO2/3:
- 0.9V to 4V programmable output
- 1μA quiescent current (typical)
- 1.71V to 5.5V input with a dedicated pin
- Dual ultra-low-IQ 200mA buck regulators
- Easy-to-implement Li+ battery charging
- Smart power selector
- 28V/-5.5V tolerant input
- Thermistor monitor
- Minimize solution footprint through high integration
- Provides five regulated voltage rails
- Switch mode option on each LDO
- Optimize system control
- Monitors pushbutton for ultra-low power mode
- Power-on reset delay and voltage sequencing
- On-chip voltage monitor multiplexer
Applications
- Wearable electronics
- Fitness monitors
- Wearable health trackers
- Rechargeable IoT devices
Additional Resources
Typical Application Circuit
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