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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX77734 Datasheet

Ultra-Low Power Tiny PMIC

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MAX77734
Ultra-Low Power Tiny PMIC with Power Path
Charger for Small Li+ and 150mA LDO
General Description
The MAX77734 is a tiny PMIC for applications where size
and simplicity are critical. The IC integrates a linear-mode
Li+ battery charger, low-dropout linear regulator (LDO),
analog multiplexer, and dual-channel current sink driver.
The charger is designed for small-battery systems
that require accurate termination as low as 0.375mA.
The circuit can instantly regulate the system voltage
when an input source is connected even if the battery is
depleted.
The 150mA LDO's output is programmable between 0.8V
and 3.975V with I2C. The analog MUX enables an exter-
nal ADC to perform conversions on battery V&I signals
for power monitoring. The current sinks are capable of
sinking 12.8mA each and can be programmed for LEDs
to blink in custom patterns.
The MAX77734 is available in a 20-bump, 0.4mm pitch
wafer-level package (WLP). For a similar product with
additional regulators, see the MAX77650.
Applications
● Hearables: Headsets, Headphones, Earbuds
● Fitness Bands and other Bluetooth Wearables
● Action Cameras, Wearable/Body Cameras
● Low-Power Internet of Things (IoT) Gadgets
Simplified Application Circuit
Benefits and Features
● Extends Battery Life
• 200nA Factory-Ship Mode for Long Shelf Life
• 500nA Shutdown Current
4.5μA Quiescent Current with LDO Enabled
• Charger Allows Battery to Relax after Charging
● Linear Charger Optimized for Small Battery Size​
• 7.5mA to 300mA Fast-Charge Current
• Battery Regulation Voltage from 3.6V to 4.6V
• Accurate Termination Current as low as 0.375mA
• Instant-On Functionality provided by Maxim's
Smart Power Selector™
• JEITA Battery Temperature Monitors for Safe
Charging
● Highly Integrated
• ​150mA LDO with Power-OK Output
• Dual-Channel Current Sink for LEDs
• Analog Multiplexer for Power Monitoring
• Watchdog Timer
• On-Key Input for LDO Enable and Manual Reset
● Small Size
• ​2.23mm x 1.97mm (0.5mm max height) WLP
• 20-Bump, 0.4mm Pitch, 4 x 5 Array
• 12.25mm2 Total Solution Size
Ordering Information appears at end of data sheet.
5V DC INPUT
4.7μF
1μF
ON-KEY
CHGIN
SYS
VL MAX77734
GND INLDO
nENLDO
LDO
VIO
4.5V
22μF
SYSTEM
1.8V/3.3V
2.2μF OUTPUT
Li+ 4.7μF
NTC
SYS
BATT
THM
TBIAS
SNK1
SNK2
POKLDO
SDA
SCL
nIRQ
PMLDO
AMUX
POWER-OK
SERIAL HOST
LDO MODE CONTROL
TO SYSTEM ADC
POWER PATH LINEAR CHARGER WITH 0.375mA TERMINATION AND DUAL-CHANNEL CURRENT SINKS
Smart Power Selector is a trademark of Maxim Integrated Products, Inc.
12.25mm2 SOLUTION SIZE
3.43mm
CCHGIN
CVL
CLDO
0.2mm COMPONENT PITCH
● PULLUP RESISTORS NOT DRAWN
● BLANK SPACE NOT EXCLUDED
19-100062; Rev 4; 11/18


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX77734 Datasheet

Ultra-Low Power Tiny PMIC

No Preview Available !

MAX77734
Ultra-Low Power Tiny PMIC with Power Path
Charger for Small Li+ and 150mA LDO
TABLE OF CONTENTS
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Benefits and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Simplified Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical Characteristics—Smart Power Selector Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical Characteristics—Adjustable Thermistor Temperature Monitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electrical Characteristics—Linear Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Electrical Characteristics—Dual-Channel Current Sink Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Electrical Characteristics—I2C Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Typical Operating Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Bump Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Bump Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Simplified Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Detailed Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
On/Off Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Factory-Ship Mode State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Shutdown (Bias Off) State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Standby (Bias On) State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Resource On State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Hardware Enable (nENLDO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Manual Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Push-Button vs. Slide-Switch Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
nENLDO Pullup Resistors to VCCINT (VCC Internal) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Interrupts (nIRQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Watchdog Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Thermal Alarms and Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Register Reset Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Factory Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Detailed Description—Smart Power Selector Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Charger Symbol Reference Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Smart Power Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Input Current Limiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Minimum Input Voltage Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
www.maximintegrated.com
Maxim Integrated 2


Part Number MAX77734
Description Ultra-Low Power Tiny PMIC
Maker Maxim Integrated
Total Page 30 Pages
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