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Ultra-Configurable SIMO PMIC Featuring
3-Output Buck-Boost, 1-LDO for Long Battery
Life Primary Cell Applications
MAX77646/MAX77647
General Description
Benefits and Features
The MAX77646/MAX77647 provides power supply solu-
tions for low-power applications where size and efficiency
are critical. The IC features a Single Inductor Multiple Out-
put (SIMO) buck-boost regulator that provides three inde-
pendently programmable power rails from a single induc-
tor to minimize total solution size. A 150mA LDO provides
ripple rejection for audio and other noise-sensitive appli-
cations. The LDO can also be configured as a load switch
to manage power consumption by disconnecting external
blocks when not required.
● 1.8V to 3.3V Input Range
● Highly Integrated
• 3x Output, Single Inductor Multiple Output (SIMO)
Buck-Boost Regulators
• Supports Wide Output Voltage Range from 0.5V
to 5.1V for all SIMO Channels
• 1x 150mA LDO
• 100mA in LSW Mode
• 2x GPIOs (MAX77647)
• Watchdog Timer (MAX77647)
The MAX77646/MAX77647 operates with battery voltages
from 1.8V with coin-cell, dual silver oxide, dual alkaline,
● Ultra Low-Power SIMO
• 1.3μA Operating Current (3x SIMO Channels)
• 0.1μA Shutdown Current
and LiSOCL primary batteries.
2
• 85% Efficiency in Buck-Only Mode (V = 2.4V,
IN
The MAX77646 (R
variant) SIMO and LDO output volt-
SEL
V
OUT
= 0.8V,10mA, I = 0.5A)
PK
ages are individually programmable through resistors. A
peak current limit input is used to set both the inductor's
peak current limits of the device with a single resistor. Indi-
vidual enable pins combined with the flexible resistor pro-
grammability allows the device to be tailored for many ap-
plications.
• 86% Efficiency in Buck-Boost Mode (V = 2.4V,
IN
V
OUT
= 1.8V,10mA, I = 0.5A)
PK
• Less Than 20mVpp Output Ripple at V
= 1.8V
OUT
• Automatic Low-Power Mode to Normal-Power
Mode Transition
● Flexible and Configurable
2
The MAX77647 (I C variant) SIMO and LDO output volt-
• Ultra-Configurable Resistor Programmable Output
Voltages (MAX77646)
2
ages are individually programmable through I C and in
addition, includes two GPIOs with alternate modes for
scalability. A bidirectional I C serial interface allows for
2
• I C-Programmable Output Voltages (MAX77647)
2
configuring and checking the status of the devices. An in-
ternal on/off controller provides a controlled startup se-
quence for the regulators and provides supervisory func-
tionality while they are on. Numerous factory programma-
ble options allow the device to be tailored for many appli-
cations, enabling faster time to market.
● Small Size
2
• 5mm Wafer-Level Package (WLP)
• 20-Bump, 0.5mm Pitch, 5 x 4 Array
Applications
● GNSS Module
● IoT Enabled Wireless Sensor Nodes
● Home Safety and Security Monitors
● Factory Safety and Security Monitors
● Fitness, Health, and Activity Trackers
19-101662; Rev 0; 6/23
Ordering Information appears at end of data sheet.
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