MAX20345

PMIC with Ultra-Low IQ Voltage Regulators, Buck-Boost for Optical Sensing and Charger for Small Lithium Ion Systems

Optimized Power Management for 24/7 Monitoring Systems Such as Wearables and IoT


Please check latest availability status for a specific part variant.

Description

The MAX20345 is a power management solution featuring ultra-low IQ voltage regulators, ideal for low-power wearable applications. The device includes a linear battery charger with a smart power selector and several power-optimized peripherals. The device features three buck regulators, three low-dropout (LDO) linear regulators, and a Buck-Boost regulator, providing up to seven regulated voltages, each with an ultra-low quiescent current. Two load switches allow disconnecting system peripherals to minimize the total quiescent load of the system. MAX20345 allows system designers to minimize power consumption and extend battery life in 24/7 operation devices, such as those in the wearable market.

The three synchronous, high-efficiency buck regulators use a pulse frequency modulated (PFM) control scheme for increased efficiency during light-load operation. The output voltage of these regulators can be programmed through I2C down to voltages as low as 0.7V. Additionally, the buck regulators support dynamic voltage scaling (DVS) allowing the system designer to further improve system power consumption when using devices that can take advantage of DVS.

Each of the three LDO regulators output voltage can be programmed through I2C. For additional flexibility, each LDO can be configured as a load switch that can be used to disconnect the quiescent load of the system peripherals.

The integrated Buck-Boost converter provides a convenient way to power system peripherals that require voltages higher and/or lower than the battery voltage, and is optimized for optical sensing systems such as optical heart rate (OHR)/PPG and SpO2 measurements. The output noise of the Buck-Boost is minimized to provide the least impact possible on sensitive measurements in such systems. The addition of DVS offers further power savings during favorable measurement conditions.

The MAX20345 also features a programmable power controller that allows the device to be configured for applications that require the device be in a true-off, or always-on, state. The controller provides a delayed reset signal and voltage sequencing. The MAX20345 is available in a 56-bump, 0.4mm pitch, 3.37mm x 3.05mm wafer-level package (WLP).

MAX20345: Typical Application Circuits MAX20345: Typical Application Circuits Enlarge+

Key Features

  • Extend Battery-Use Time Between Charging
    • 3 x Low IQ Buck Regulators (IQ = 0.9μA typ)
      • 220mA Output Current
      • Noise Mitigation by Flexible Adjustment of Switching Frequency
      • Buck1: 0.700V to 1.330V Output Voltage in 10mV Steps
      • Buck2: 0.700V to 2.275V Output Voltage in 25mV Steps
      • Buck3: 0.700V to 3.850V Output Voltage in 50mV Steps
    • LDO1 (IQ = 0.55µA typ)
      • 100mA Output
      • 2.7V to 5.5V Input Voltage Range
      • 0.8V to 3.6V Output Voltage in 100mV Steps
    • LDO2 (IQ = 1µA typ)
      • 100mA Output
      • 1.71V to 5.50V Input Voltage Range
      • 0.9V to 4.0V Output Voltage in 100mV Steps
    • LDO3 (IQ = 1µA typ)
      • 50mA Output
      • 1.00V to 2.00V Input Voltage Range
      • 0.50V to 1.95V Output Voltage in 25mV Steps
    • 2 x Load Switches
      • 0.65V to 5.50V Input Voltage Range
      • 1Ω RON at SYS = 3.0V
    • Low IQ Buck-Boost Regulator (IQ = 2µA typ)
      • 1.5W Output Capability
      • 2.6V to 5.5V Output Voltage in 50mV Steps
  • Easy to Implement Li+ Battery Charging
    • Linear Li-Ion Battery Charger
      • 5mA to 500mA Charge current
      • +28V / -5.5V Tolerant Input
      • Step Charging (See the Step Charging Section)
    • Thermistor Monitor
    • Smart Power Selector
  • Optimize System Control
    • Power On/ Reset Controller
    • Push-Button Monitor
    • Factory Shipping Mode
    • System Interface
      • Monitor Multiplexer with Programmable Divider to Monitor System Voltages and Charging Current

Applications/Uses

  • IoT
  • Wearable Devices
Part NumberPrimary TopologyMonitor/Control FeaturesDC-DC/Power FeaturesLCD/LED/Flash/CCD FeaturesBattery Charger FeaturesInterface TypeVIN
(V)
VIN
(V)
VOUT
(V)
VOUT
(V)
Max. IOUT
(A)
Max. IOUT
(A)
Oper. Freq.
(kHz)
Package/Pins
minmaxminmax
MAX14663 Step-UpReset OutputSoft StartWhite LEDSmart Pwr. SelectorI2C2.75.55170.50.51500
TQFN/40
See All Multifunction PMICs (79)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX20345EVKIT: Evaluation Kit for the MAX20345

Quality and Environmental Data

Request Reliability Report for: MAX20345 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX20345AEWN+
  • MAX20345AEWN+T
  • MAX20345EWN+
  • MAX20345EWN+T
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

     
    Status:
    Package:
    Temperature:

    Related Resources


    MAXM17904
    4.5V to 24V, 300mA Himalaya uSLIC Step-Down Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17905
    4.5V to 24V, 300mA Himalaya uSLIC Step-Down Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17906
    4.5V to 24V, 300mA Himalaya uSLIC Step-Down Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAX25600
    Synchronous High Voltage 4 Switch Buck Boost LED Controller

    • Automotive Ready: AEC-Q100 Qualified
    • Integration Minimizes BOM for High-Brightness LED Driver, Saving Space and Reducing Cost
    • Wide Dimming Ratio allows High Contrast Ratio

    MAX20010C
    Automotive Single 6A Step-Down Converters

    • Fully Integrated, Synchronous 6A DC-DC Converter Enables Small Solution Size
    • High-Precision Voltage Regulator for Applications Processors
    • Low-Noise Feature Reduces EMI

    MAX20010D
    Automotive Single 6A Step-Down Converters

    • Fully Integrated, Synchronous 6A DC-DC Converter Enables Small Solution Size
    • High-Precision Voltage Regulator for Applications Processors
    • Low-Noise Feature Reduces EMI

    MAX20048
    Automotive 40V, 55µA IQ, 2.2MHz, H-Bridge Buck-Boost Controller

    • Meets Stringent Automotive Quality and Reliability Requirements
    • Efficient Solution in a Small Solutions Size
    • Low Quiescent Current Helps Designers Meet Stringent OEM Current Requirements

    MAX17312
    1-Cell ModelGauge m5 EZ Fuel Gauge with Protector and SHA-256 Authentication

    • Battery Health + Programmable Safety/Protection
    • Nonvolatile Memory for Stand-Alone Operation
    • Low Quiescent Current

    MAX17313
    1-Cell ModelGauge m5 EZ Fuel Gauge with Protector and SHA-256 Authentication

    • Battery Health + Programmable Safety/Protection
    • Nonvolatile Memory for Stand-Alone Operation
    • Low Quiescent Current

    MAX17301
    1-Cell ModelGauge m5 EZ Fuel Gauge with Protector and SHA-256 Authentication

    • Battery Health + Programmable Safety/Protection
    • Nonvolatile Memory for Stand-Alone Operation
    • Low Quiescent Current

    MAX17302
    1-Cell ModelGauge m5 EZ Fuel Gauge with Protector and SHA-256 Authentication

    • Battery Health + Programmable Safety/Protection
    • Nonvolatile Memory for Stand-Alone Operation
    • Low Quiescent Current

    MAX17303
    1-Cell ModelGauge m5 EZ Fuel Gauge with Protector and SHA-256 Authentication

    • Battery Health + Programmable Safety/Protection
    • Nonvolatile Memory for Stand-Alone Operation
    • Low Quiescent Current

    MAX17311
    1-Cell ModelGauge m5 EZ Fuel Gauge with Protector and SHA-256 Authentication

    • Battery Health + Programmable Safety/Protection
    • Nonvolatile Memory for Stand-Alone Operation
    • Low Quiescent Current

    MAX20039
    Automotive, 2V to 36V, 2.2MHz, 0.6A/1.2A Buck-Boost Converters with Integrated H-Bridge Architecture

    • Meets Stringent Automotive Quality and Reliability Requirements
    • Low Quiescent Current Helps Designers Meet Stringent OEM Current Requirements (B and D version only)
    • High Switching Frequency Allows Use of Small External Components

    MAX20040
    Automotive, 2V to 36V, 2.2MHz, 0.6A/1.2A Buck-Boost Converters with Integrated H-Bridge Architecture

    • Meets Stringent Automotive Quality and Reliability Requirements
    • Low Quiescent Current Helps Designers Meet Stringent OEM Current Requirements (B and D version only)
    • High Switching Frequency Allows Use of Small External Components

    MAX20029B
    Automotive Quad/Triple/Quad Low-Voltage Step-Down DC-DC Converters

    • Quad Step-Down DC-DC Converters with Integrated FETs
    • Operate from 3.0V to 5.5V Supply Voltage
    • 1.0V to 4.0V Fixed or Adjustable Output Voltage

    MAX20029C
    Automotive Quad/Triple/Quad Low-Voltage Step-Down DC-DC Converters

    • Quad Step-Down DC-DC Converters with Integrated FETs
    • Operate from 3.0V to 5.5V Supply Voltage
    • 1.0V to 4.0V Fixed or Adjustable Output Voltage

    MAX20029, MAX20029B, MAX20029C
    Automotive Quad/Triple/Quad Low-Voltage Step-Down DC-DC Converters

    • Quad Step-Down DC-DC Converters with Integrated FETs
    • Operate from 3.0V to 5.5V Supply Voltage
    • 1.0V to 4.0V Fixed or Adjustable Output Voltage

    MAX77827
    5.5V Input, 1.8A/3.1A Switch Buck-Boost Converter with 6μA IQ

    • 1.8V to 5.5V Input Voltage Range
    • 2.3V to 5.3V Single Resistor Adjustable Output Voltage
    • 1.6A Maximum Output Current (3.1A ILIM Option, Buck Mode)

    MAX17823H
    12-Channel, High-Voltage Sensor with Integrated 650mA Cell Balancing and Differential UART for Daisy-Chain Communication

    • AECQ-100 Grade 2 Temperature Range
    • Operating Voltage from 9V to 65V
    • Ultra-Low Power Operation

    MAX25615
    7A Sink, 3A Source, 12ns, SOT23 MOSFET Drivers

    • Automotive Ready: AEC-Q100 Qualified
    • Independent Source and Sink Outputs
    • +4V to +15.5V Single Power-Supply Range

    MAX20334
    OverVoltage and Surge-Protected Dual SPDT Data Line Switch

    • Distortion-Free, High-Speed Signaling
    • Flexible System Design
    • Robust and Safety

    MAX25615EVKIT
    Evaluation Kit for the MAX25615

    • +4V to +16V Single Power-Supply Range
    • 7A Peak Sink Current
    • 3A Peak Source Current

    MAX25611D
    Automotive High-Voltage, HB-LED Controller

    • Automotive Ready: AEC-Q100 Qualified
    • Integration Minimizes BOM for High-Brightness LED Driver
    • Flexible Application Configurations

    MAX25611C
    Automotive High-Voltage, HB-LED Controller

    • Automotive Ready: AEC-Q100 Qualified
    • Integration Minimizes BOM for High-Brightness LED Driver
    • Flexible Application Configurations

    MAX25611A
    Automotive High-Voltage, HB-LED Controller

    • Automotive Ready: AEC-Q100 Qualified
    • Integration Minimizes BOM for High-Brightness LED Driver
    • Flexible Application Configurations

    MAX25611B
    Automotive High-Voltage, HB-LED Controller

    • Automotive Ready: AEC-Q100 Qualified
    • Integration Minimizes BOM for High-Brightness LED Driver
    • Flexible Application Configurations

    MAX25610A
    Synchronous Buck and Buck Boost LED Driver / DC-DC Converter

    • Automotive Ready: AEC-Q100 Qualified
    • Integration Minimizes BOM to Save Space and Cost
    • Wide Dimming Ratio Allows High Contrast Ratio

    MAX25610B
    Synchronous Buck and Buck Boost LED Driver / DC-DC Converter

    • Automotive Ready: AEC-Q100 Qualified
    • Integration Minimizes BOM to Save Space and Cost
    • Wide Dimming Ratio Allows High Contrast Ratio

    MAX16152
    nanoPower Supervisor and Watchdog Timer

    • 400nA (typ) Supply Current
    • 1.2V to 5.5V Operating Supply Range
    • Monitors Supply Voltage and Provides System Reset Signal

    MAX16153
    nanoPower Supervisor and Watchdog Timer

    • 400nA (typ) Supply Current
    • 1.2V to 5.5V Operating Supply Range
    • Monitors Supply Voltage and Provides System Reset Signal

    MAX16154
    nanoPower Supervisor and Watchdog Timer

    • 400nA (typ) Supply Current
    • 1.2V to 5.5V Operating Supply Range
    • Monitors Supply Voltage and Provides System Reset Signal

    MAX16155
    nanoPower Supervisor and Watchdog Timer

    • 400nA (typ) Supply Current
    • 1.2V to 5.5V Operating Supply Range
    • Monitors Supply Voltage and Provides System Reset Signal

    MAX17613B
    4.5V to 60V, 3A Current-Limiter with OV, UV, and Reverse Protection

    • Robust Protection Reduces System Downtime
    • Flexible Design Options Enable Reuse and Less Requalification
    • Saves Board Space and Reduces External BOM Count

    MAX17613C
    4.5V to 60V, 3A Current-Limiter with OV, UV, and Reverse Protection

    • Robust Protection Reduces System Downtime
    • Flexible Design Options Enable Reuse and Less Requalification
    • Saves Board Space and Reduces External BOM Count

    MAX17613A
    4.5V to 60V, 3A Current-Limiter with OV, UV, and Reverse Protection

    • Robust Protection Reduces System Downtime
    • Flexible Design Options Enable Reuse and Less Requalification
    • Saves Board Space and Reduces External BOM Count

    MAX21610
    Automotive 16-Channel 100mA Local Dimming Backlight Driver with SPI Interface

    • High Integration
    • Robust and Low EMI
    • Relative Dimming Ratio Between Strings Up to 32768:1

    MAX17687
    4.5V to 60V Input, Ultra-Small, High-Efficiency, Iso-Buck DC-DC Converter

    • Eliminates External Components and Reduces Total Cost
    • Supports Numerous Isolated DC-DC Applications
    • Reduces Power Dissipation

    MAX17686
    4.5V to 60V Input, High-Efficiency, Iso-Buck DC-DC Converter

    • Reduces External Components and Total Cost
    • Supports Numerous Isolated DC-DC Applications
    • Reduces Power Dissipation

    MAX20480
    Automotive ASIL-D 7-Channel Power-System Monitor

    • Small Solution
    • High Precision
    • Highly Integrated

    MAXM15465
    4.5V to 42V, 300mA Himalaya uSLIC Step-Down Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM15466
    4.5V to 42V, 300mA Himalaya uSLIC Step-Down Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM15467
    4.5V to 42V, 300mA Himalaya uSLIC Step-Down Power Module

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17623
    2.9V to 5.5V, 1A Himalaya uSLIC Step-Down Power Modules

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAXM17624
    2.9V to 5.5V, 1A Himalaya uSLIC Step-Down Power Modules

    • Easy to Use
    • High Efficiency
    • Flexible Design

    MAX17853
    14-Channel High-Voltage Data-Acquisition System

    • 65V Operating Voltage
    • Ultra-Low-Power Operation
    • Redundant ADC and Comparator (COMP) Acquisitions

    MAX20444B
    Automotive 4-Channel 130mA Backlight Driver with Boost/SEPIC Controller and I2C Interface

    • Wide-Voltage-Range Operation
    • High Integration
    • Robust and Low EMI

    MAX77860
    USB Type-C, 3A Switch-Mode Buck Charger with Integrated CC Detection, Reverse Boost, and ADC

    • Single-Input Switch Mode Charger
    • USB Type-C Detection
    • One Safeout LDO
    • I2C-Compatible Interface

    MAX38902E
    14μVRMS Low Noise 500mA LDO Linear Regulator

    • Delivers Flexible Operating Range
    • Reduces Noise and Improved Accuracy
    • Enables Easy-of-Use and Robust Protection

    MAX38904A
    1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP

    • Delivers Flexible Operating Range
    • Reduces Noise and Improves Accuracy
    • Enables Ease-of-Use and Robust Protection

    MAX38904B
    1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP

    • Delivers Flexible Operating Range
    • Reduces Noise and Improves Accuracy
    • Enables Ease-of-Use and Robust Protection

    MAX38904C
    1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP

    • Delivers Flexible Operating Range
    • Reduces Noise and Improves Accuracy
    • Enables Ease-of-Use and Robust Protection

    MAX38904D
    1.7V–5.5VIN, 2A Low Noise LDO Linear Regulators in TDFN and WLP

    • Delivers Flexible Operating Range
    • Reduces Noise and Improves Accuracy
    • Enables Ease-of-Use and Robust Protection

    MAX16150
    nanoPower Pushbutton On/Off Controller and Battery Freshness Seal

    • Low Power
    • Debounces Noisy Switches
    • Latched Output Supplies 20mA Load Current With Less Than 100mV Drop

    MAX20049
    Flexible, Compact Quad Power Supply with 2.2MHz, 500mA Buck Converters and Dual LDOs for Automotive Camera Modules

    • Small Solution Size
    • EMI Solutions
    • Self-Protected and Robust

    MAX17673
    Integrated 4.5V to 60V Synchronous 1.5A HV Buck and Dual 2.7V to 5.5V, 1A Buck Regulators

    • Reduces External Components and Total Cost
    • Integrates Three DC-DC Regulators
    • Reduces Power Dissipation

    MAX77813
    High-Efficiency Buck-Boost Converter

    • VIN Range: 2.30V to 5.5V
    • VOUT Range: 2.60V to 5.14V (I2C Programmable in 20mV Step)
    • Up to 2A Output Current in Boost Mode (VIN = 3.0V, VOUT = 3.4V, ILIM = High)

    MAX38640A
    Tiny 1.8V–5.5V Input, 330nA IQ, 700mA nanoPower Buck Converter

    • Extends Battery Life
    • Easy to Use – Addresses Popular Operation
    • Protects System in Multiple Use Cases

    MAX38641A
    Tiny 1.8V–5.5V Input, 330nA IQ, 700mA nanoPower Buck Converter

    • Extends Battery Life
    • Easy to Use – Addresses Popular Operation
    • Protects System in Multiple Use Cases

    MAX38642A
    Tiny 1.8V–5.5V Input, 330nA IQ, 700mA nanoPower Buck Converter

    • Extends Battery Life
    • Easy to Use – Addresses Popular Operation
    • Protects System in Multiple Use Cases

    MAX38641, MAX38641A
    Tiny 1.8V–5.5V Input, 330nA IQ, 700mA nanoPower Buck Converter

    • Extends Battery Life
    • Easy to Use – Addresses Popular Operation
    • Protects System in Multiple Use Cases

    MAX38642, MAX38642A
    Tiny 1.8V–5.5V Input, 330nA IQ, 700mA nanoPower Buck Converter

    • Extends Battery Life
    • Easy to Use – Addresses Popular Operation
    • Protects System in Multiple Use Cases

    MAX38643, MAX38643A
    Tiny 1.8V–5.5V Input, 330nA IQ, 700mA nanoPower Buck Converter

    • Extends Battery Life
    • Easy to Use – Addresses Popular Operation
    • Protects System in Multiple Use Cases

    MAX38643A
    Tiny 1.8V–5.5V Input, 330nA IQ, 700mA nanoPower Buck Converter

    • Extends Battery Life
    • Easy to Use – Addresses Popular Operation
    • Protects System in Multiple Use Cases


    Electronics in Vehicles (ELIV) 2019
    10/18/2019 - 10/19/2019, Bonn, Germany
    The international VDI Congress ELIV (Electronics In Vehicles) is THE event for all experts in the field of electrical and electronical car engineering and integration of mechanical and electronical systems.

    RSVP