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MAX77650/MAX77651 Ultra-Low Power PMIC with 3-Output SIMO
and Power Path Charger for Small Li+
General Description Benefits and Features
The MAX77650/MAX77651 provide highly-integrated bat- Highly Integrated
tery charging and power supply solutions for low-power Smart Power Selector Li+/Li-Poly Charger
wearable applications where size and efficiency are 3 Output, Single-Inductor Multiple-Output (SIMO)
Buck-Boost Regulator
critical. Both devices feature a SIMO buck-boost regulator
that provides three independently programmable power 150mA LDO
3-Channel Current Sink Driver
rails from a single inductor to minimize total solution
size. A 150mA LDO provides ripple rejection for audio Analog MUX Output for Power Monitoring
and other noise-sensitive applications. A highly configu-
Low Power
rable linear charger supports a wide range of Li+ battery
0.3A Shutdown Current
capacities and includes battery temperature monitoring
5.6A Operating Current (3 SIMO Channels +
for additional safety (JEITA).
LDO)
The devices include other features such as current sinks
Charger Optimized for Small Battery Size
for driving LED indicators and an analog multiplexer that
Programmable Fast-Charge Current from 7.5mA to
switches several internal voltage and current signals to an
300mA
external node for monitoring with an external ADC. A bidi-
Programmable Battery Regulation Voltage from
2
rectional I C interface allows for configuring and check-
3.6V to 4.6V
ing the status of the devices. An internal on/off controller
Programmable Termination Current from 0.375mA
provides a controlled startup sequence for the regulators
to 45mA
and provides supervisory functionality when the devices
JEITA Battery Temperature Monitors Adjust Charge
are on. Numerous factory programmable options allow
Current and Battery Regulation Voltage for Safe
the device to be tailored for many applications, enabling
Charging
faster time to market.
Flexible and Configurable
2
I C Compatible Interface and GPIO
Simplified Application Circuit
Factory OTP Options Available
V IN_SBB
BUS
Small Size
CHGIN SYS
VSYS
2.75mm x 2.15mm x 0.7mm WLP Package
BATT
+
30-Bump, 0.4mm-Pitch WLP, 6x5 Array
2
Small Total Solution Size (19.2mm )
GND IN_LDO
SBB0 2.05V
Applications
TBIAS
SBB1 1.2V
THM SYSTEM
Bluetooth Headphones/Hearables
SBB2 3.3V RESOURCES
Fitness, Health, and Activity Monitors
Portable Devices
PGND
1.5H
Internet of Things (IoT)
GPIO
LXA GPIO
LXB
VIO
BST
LDO 1.85V
Ordering Information appears at end of data sheet.
MAX77650
SYS
Smart Power Selector is a trademark of Maxim Integrated
LED0 VIO/Power
Products, Inc.
LED1
*
SDA SDA
LED2
* PROCESSOR
SCL
SCL
*
nRST nRST
*
nEN nIRQ nIRQ
PWR_HLD
PWR_HLD
AMUX AMUX ADC INPUT
*PULLUP RESISTORS NOT DRAWN
19-8550; Rev 7; 9/18MAX77650/MAX77651 Ultra-Low Power PMIC with 3-Output SIMO
and Power Path Charger for Small Li+
TABLE OF CONTENTS
General Description ............................................................................ 1
Benefits and Features .......................................................................... 1
Applications .................................................................................. 1
Simplified System Diagram ...................................................................... 1
Absolute Maximum Ratings ...................................................................... 7
Package Information ........................................................................... 7
Electrical CharacteristicsTop Level .............................................................. 9
Electrical CharacteristicsGlobal Resources....................................................... 10
Electrical CharacteristicsSmart Power Selector Charger ............................................ 12
Electrical CharacteristicsAdjustable Thermistor Temperature Monitors ................................. 16
Electrical CharacteristicsAnalog Multiplexer and Power Monitor AFEs.................................. 16
Electrical CharacteristicsSIMO Buck-Boost....................................................... 17
Electrical CharacteristicsLDO ................................................................. 19
Electrical CharacteristicsCurrent Sinks .......................................................... 21
2
Electrical CharacteristicsI C Serial Interface...................................................... 22
Typical Operating Characteristics ................................................................ 25
Pin Configuration ............................................................................. 34
Pin Description ............................................................................... 34
Detailed Description........................................................................... 36
Support Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Top-Level Interconnect Simplified Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Global Resources............................................................................. 38
Features and Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Voltage Monitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
SYS POR Comparator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
SYS Undervoltage Lockout Comparator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
SYS Overvoltage Lockout Comparator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
nEN Enable Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
nEN Manual Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
nEN Dual-functionality: Push-Button vs. Slide-Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Interrupts (nIRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Reset Output (nRST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Power Hold Input (PWR_HLD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
General-Purpose Input Output (GPIO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
On/Off Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Flexible Power Sequencer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Debounced Inputs (nEN, GPI, CHGIN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Smart Power Selector Charger .................................................................. 50
Maxim Integrated 2
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