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MAX77642/MAX77643 Ultra Configurable PMIC Featuring 93% Peak
Efficiency Single-Inductor, 3-Output Buck-
Boost, 1-LDO for Long Battery Life
General Description Benefits and Features
The MAX77642/MAX77643 provide power supply solu- Highly Integrated
tions for low-power applications where size and efficiency 3x Output, Single-Inductor Multiple-Output (SIMO)
are critical. The IC features a SIMO buck-boost regulator Buck-Boost Regulator
that provides three independently programmable power Supports Wide Output Voltage Range from 0.5V
rails from a single inductor to minimize total solution size. to 5.5V for all SIMO Channels
A 150mA LDO provides ripple rejection for audio and other 1x 150mA LDO
noise-sensitive applications. The LDO can also be config- 100mA in LSW mode
ured as load switches to manage power consumption by 2x GPIOs (MAX77643)
disconnecting external blocks when not required. Watchdog Timer (MAX77643)
The MAX77642's SIMO and LDO output voltages are in- Ultra Low-Power SIMO
dividually programmable through resistors. A peak current 5A Operating Current (3x SIMO Channels + 1x
limit input is used to set both the inductor's peak current LDOs)
limits of the device with a single resistor. Individual enable 1A Operating Current per SIMO Channel
pins combined with the flexible resistor programmability al- 0.3A Shutdown Current
lows the device to be tailored for many applications. 93% Peak Efficiency in Boost-Only Mode
91% Peak Efficiency in Buck-Only Mode
This MAX77643's SIMO and LDO output voltages are in-
Less Than 20mVpp Output Ripple at V = 1.8V
2
OUT
dividually programmable through I C and in addition, in-
Automatic Low-Power Mode to Normal-Power
cludes two GPIOs with alternate modes for scalability. A
Mode Transition
2
bidirectional I C serial interface allows for configuring and
checking the status of the devices. An internal on/off con- Flexible and Configurable
troller provides a controlled startup sequence for the regu- Ultra-Configurable Resistor Programmable Output
lators and provides supervisory functionality while they are Voltages (MAX77642)
2
on. Numerous factory programmable options allow the de- I C-Programmable Output Voltages (MAX77643)
vice to be tailored for many applications, enabling faster
Small Size
time to market.
2
4.24mm Wafer-Level Package (WLP)
25-Bump, 0.4mm Pitch, 5 x 5 Array
Applications
Next Generation Hearables
Ordering Information appears at end of data sheet.
Fitness, Health, and Activity Monitors
Safety and Security Monitors
Portable Consumer Devices
19-100912; Rev 1; 10/20MAX77642/MAX77643 Ultra Configurable PMIC Featuring 93% Peak
Efficiency Single-Inductor, 3-Output Buck-Boost,
1-LDO for Long Battery Life Applications
Simplified Block Diagram
ULTRA CONFIGURABLE SIMO
*GPIO/nRST/NIRQ
MAX77643*MAX77643*
FEATURING 91% PEAK SSIIMMOO EEFFFFIICCIIEENNCCYY
NOT SHOWN
100
EFFICIENCY
IN_SBB
SYSA
+
2.7V TO 5.5V
95
DC INPUT
PGND
GND
90
IN_LDO
APPLICATION
LXA
PROCESSOR
LXB 85
SBB0 2.0V
SBB1 1.2V
BST
VOUT= 1.8V
80
SBB2
3.3V
VOUT = 1.2V
V = V = 3.7V
SYSA IN_SBB
75
PROGRAMMABLE nEN L = 1.5H
I = 0.5A
PUSH-BUTTON PEAK
VIO VOUT = 0.8V
1.8V
MODES
LDO
70
0.0001 0.001 0.01 0.1
IOUT (A)
MAX77642MAX77642
SYSA
IN_SBB
Li-Ion +
PGND
GND
LXA
LXB IN_LDO
BST
SBB0 2.0V
RSET_SBB0
SBB1 1.2V
SYSTEM
SBB2 3.3V
RESOURCES
RSET_SBB1
LDO 1.8V
RSET_SBB2
RSET_LDO
EN0
EN1
ENABLE
LOGIC INPUTS
RSET_IPK EN2
ENLDO
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EFFICIENCY (%)