Wearables power controller works down to 0.7V for disposable button cells
- Author:Ella Cai
- Release on:2017-03-31
MAX20310 is a power management for wearables that will work from as little as 0.7V and up to 2V, for operation from single zinc-air, silver oxide and alkaline cells.
The aim is to allow disposable rather than rechargeable cells to be used – to remove the need for charging components and, in clinical environments, remove the need for contacts, clips, and charging ports where germs may linger, said the firm, adding: “In clinical environments, primary cell architectures can create hermetically sealed units to safely disinfect between use or even dispose of completely to inhibit patient-to-patient infection.”
Using a single-inductor two-output architecture with two linear regulators, the chip drives four power outputs from a single inductor.
For pre-use product storage, there is a 10nA ‘battery seal’ mode.
Operation is over -40 to +85degC, and it comes in a 1.63 x 1.63mm wafer-level package.
An application circuit in the abridged data sheed (full not publicly available) shows the chip being used with a MAX32620 ARM Cortex-M4F based microcontroller.
There is an evaluation kit: MAX20310EVKIT#
Dual-output buck-boost
Vin 0.7-2.0V (250mW max)
Vout 0.9-4.05V
1μA quiescent
84% efficient for 1.8Vout 10mA
Dual LDOs
Supplied from buck-boost
Inputs Supplied by Dual Buck-Boost Outputs
Vout 0.5-3.65V
Iout max 50mA
0.5μA quiescent
Configurable as load switch
The aim is to allow disposable rather than rechargeable cells to be used – to remove the need for charging components and, in clinical environments, remove the need for contacts, clips, and charging ports where germs may linger, said the firm, adding: “In clinical environments, primary cell architectures can create hermetically sealed units to safely disinfect between use or even dispose of completely to inhibit patient-to-patient infection.”
Using a single-inductor two-output architecture with two linear regulators, the chip drives four power outputs from a single inductor.
For pre-use product storage, there is a 10nA ‘battery seal’ mode.
Operation is over -40 to +85degC, and it comes in a 1.63 x 1.63mm wafer-level package.
An application circuit in the abridged data sheed (full not publicly available) shows the chip being used with a MAX32620 ARM Cortex-M4F based microcontroller.
There is an evaluation kit: MAX20310EVKIT#
Dual-output buck-boost
Vin 0.7-2.0V (250mW max)
Vout 0.9-4.05V
1μA quiescent
84% efficient for 1.8Vout 10mA
Dual LDOs
Supplied from buck-boost
Inputs Supplied by Dual Buck-Boost Outputs
Vout 0.5-3.65V
Iout max 50mA
0.5μA quiescent
Configurable as load switch
