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nanoPower Triple/Dual-Output, Single-Inductor,
Multiple-Output (SIMO) Buck-Boost Regulator
The MAX17270/MAX17271 are 3-output switching
regulators designed for applications requiring efficient
regulation of multiple supplies in a very small space, such
as wearable electronic devices.
The parts use a buck-boost architecture that regulates
three outputs using a single, small 2.2µH inductor at
efficiencies up to 85%. This results in smaller board space
while delivering better total system efficiency than equivalent
power solutions using one buck and linear regulators.
The supply current is 0.85µA when only one output is
enabled, plus 0.2µA for each additional output enabled.
This SIMO (Single-Input Multiple Output) regulator utilizes
the entire battery voltage range due to its ability to create
output voltages that are above, below, or equal to the
input voltage. Peak inductor current for each output is
programmable to optimize the balance between efficiency,
output ripple, EMI, PCB design, and load capability.
Two versions are available. The MAX17270 has 3 enable
inputs and 3 output voltage programming inputs. The
MAX17271 includes an I2C interface with interrupt, a
push-button turn on/off, and a power-good indication.
The MAX17272/MAX17273 are 2-output versions of
All versions are offered in either a 4 x 4, 0.4mm wafer-
level package (WLP) or a 16-pin TQFN package.
●● Bluetooth Headsets
●● Fitness Bands
Benefits and Features
●● 3-Output/2-Output, Single-Inductor, Multiple-Output
(SIMO) Buck-Boost Regulator
●● 2.7V to 5.5V Input Voltage Range
●● Low-Power and Long Battery Life
• 1.3μA Operating Current (3 SIMO Channels)
• 330nA Shutdown Current
• 85% Efficiency at 3.3V Output
●● Flexible and Configurable
• I2C Compatible Interface (MAX17271/MAX17273)
• Programmable Output Voltage: 0.8V to 5.175V
• Programmable Peak Current Limit
• Overload Protection
• Thermal Protection
●● Small Size
• 1.77mm x 1.77mm x 0.50mm 0.4mm-Pitch WLP
• 3mm x 3mm x 0.75mm TQFN Package
• Small Total Solution Size
Ordering Information appears at end of data sheet.
19-100234; Rev 3; 8/18