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Ultra-Low Quiescent Current PMIC with
SIMO Buck-Boost for Wearable Applications
The MAX20310 is a compact power management
integrated circuit (PMIC) for space-constrained, battery-
powered applications where size and efficiency are critical.
The device combines two single inductor, multiple output
(SIMO) buck-boosted outputs with two LDOs and other sys-
tem power management features like a push-button monitor
and sequencing controller.
The device includes a SIMO buck-boost switching regula-
tor that provides two programmable voltage rails using
a single inductor, minimizing solution footprint. The
MAX20310 operates with battery voltages down to 0.7V
for use with Zinc Air, Silver Oxide, or Alkaline batteries.
The architecture allows for output voltages above or
below the battery voltage.
Additionally, the MAX20310 has two programmable low-
dropout (LDO) linear regulators. The linear regulators can
also operate as power switches that can disconnect the
quiescent load of system peripherals.
The MAX20310 includes a programmable power
controller that allows the device to be configured for
use in applications that require a true off state or for
always-on applications. This controller provides a delayed
reset signal, voltage sequencing, and customized button
timing for on/off control and recovery hard reset.
The device also features a multiplexer for monitoring the
power inputs and outputs of each function. The MAX20310
is available in a 16-bump 0.4mm pitch 1.63mm x 1.63mm
wafer-level package (WLP) and operates over the -40°C
to +85°C extended temperature range.
Typical Operating Circuit
+1.8V +1.5V +1.2V +1.2V
VIO VAN VDD VSW
Benefits and Features
●● Extend System Battery Use Time
• Single Inductor, Multiple Output (SIMO) Ultra-Low
IQ Buck-Boost Regulator
• Battery Input Voltage from 0.7V to 2.0V
• Output Voltage Programmable From 0.9V
• 250mW Maximum Total Input Power
• Incremental CAP Quiescent Current 1μA per
• 84% Efficiency for 1.8V, 10mA Output
• Input Current Limited
• Dual Ultra-Low IQ 50mA LDO
• Inputs Supplied by Dual Buck-Boost Outputs
• Output Programmable from 0.5V to 3.65V
• Quiescent Current 1.1µA per LDO / 600nA per
• Configurable as Load Switch
●● Extend Product Shelf-Life
• Battery Seal Mode
• 10nA Battery Current (typ)
●● Minimize Board Area
• 1.63mm x 1.63mm WLP
●● Easy-to-Implement System Control
• Voltage Monitor Multiplexer
• 1% Accurate Battery Inverter (±10mV at 1.0V)
• Power Button Monitor
• Buffered Output
• Power Sequencing
• Reset Output
• I2C Control Interface
●● Wearable Medical Devices
●● Wearable Fitness Devices
●● Portable Medical Devices
Ordering Information appears at end of data sheet.
19-8611; Rev 2; 3/18