The MAX14745 is a battery-charge-management solution ideal for low-power wearable applications. The device includes a linear battery charger with a smart power selector and several power-optimized peripherals. The MAX14745 features two ultra-low quiescent current buck regulators and three ultra-low quiescent current low-dropout (LDO) linear regulators, providing up to five regulated voltages, each with an ultra-low quiescent current, allows designers to minimize power consumption and extend battery life in 24/7 operation devices, such as those in the wearable market.The battery charger features a smart power selector that allows operation on a dead battery when connected to a power source. To avoid overloading a power adapter, the input current to the smart power selector is limited based on an I2C register setting. If the charger power source is unable to supply the entire system load, the smart power control circuit supplements the system load with current from the battery. The charger also supports temperature dependent charge currents.The two synchronous, high-efficiency step-down buck regulators feature a variable frequency mode for increased efficiency during light-load operation. The output voltage of these regulators can be programmed through I2C with the default preconfigured. The buck regulators cansupport dynamic voltage scaling to further improve system power consumption.The three configurable LDOs each have a dedicated input pin. Each LDO regulator output voltage can be programmed through I2C with the default preconfigured. The linear regulators can also be configured to operate as power switches that may be used to disconnect the quiescent load of the system peripherals.The MAX14745 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 also provides a delayed reset signal and voltage sequencing.The MAX14745 is available in a 36-bump, 0.4mm pitch, 2.72mm x 2.47mm wafer-level package (WLP).ApplicationsFitness MonitorsRechargeable IoT devicesWearable Electronics

The MAX14745 is a battery-charge-management solution ideal for low-power wearable applications. The device includes a linear battery charger with a smart power selector and several power-optimized peripherals. The MAX14745 features two ultra-low quiescent current buck regulators and three ultra-low quiescent current low-dropout (LDO) linear regulators, providing up to five regulated voltages, each with an ultra-low quiescent current, allows designers to minimize power consumption and extend battery life in 24/7 operation devices, such as those in the wearable market.The battery charger features a smart power selector that allows operation on a dead battery when connected to a power source. To avoid overloading a power adapter, the input current to the smart power selector is limited based on an I2C register setting. If the charger power source is unable to supply the entire system load, the smart power control circuit supplements the system load with current from the battery. The charger also supports temperature dependent charge currents.The two synchronous, high-efficiency step-down buck regulators feature a variable frequency mode for increased efficiency during light-load operation. The output voltage of these regulators can be programmed through I2C with the default preconfigured. The buck regulators cansupport dynamic voltage scaling to further improve system power consumption.The three configurable LDOs each have a dedicated input pin. Each LDO regulator output voltage can be programmed through I2C with the default preconfigured. The linear regulators can also be configured to operate as power switches that may be used to disconnect the quiescent load of the system peripherals.The MAX14745 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 also provides a delayed reset signal and voltage sequencing.The MAX14745 is available in a 36-bump, 0.4mm pitch, 2.72mm x 2.47mm wafer-level package (WLP).ApplicationsFitness MonitorsRechargeable IoT devicesWearable Electronics

The MAX14775E/MAX14776E fault-protected RS-485/RS-422 transceivers feature ±65V protection for overvoltage signal faults on communication bus lines, ensuring communication in harsh industrial environments. Each device contains one driver and one receiver and operates over the 3V to 5.5V supply range. The MAX14775E is optimized for high-speed data rates up to 20Mbps. The MAX14776E features slew-rate limited outputs for data rates up to 500kbps.These transceivers are optimized for robust communication in noisy environments. A large 200mV (typ) hysteresis on receiver inputs ensure for high noise rejection and a failsafe feature guarantees a logic-high on the receiver output when the inputs are open or shorted. Driver outputs are protected against short-circuit conditions.The MAX14775E/MAX14776E receivers feature a 1/3-unit load input impedance, allowing up to 100 transceivers on a bus.The MAX14775E/MAX14776E are available in 8-pin SOIC and 8-pin TDFN-EP packages and operate over the -40°C to +125°C temperature range.ApplicationsHVACIndustrial Field Bus NetworksMotion Controllers

Please see the MAX14827A for our recommended replacement.The MAX14827 integrates the high-voltage functionscommonly found in industrial sensors, including driversand regulators. The MAX14827 features two ultra lowpowerdrivers with active reverse-polarity protection.Operation is specified for normal 24V supply voltagesup to 60V. Transient protection is simplified due to highvoltage tolerance allowing the use of micro TVS.The device features a flexible control interface. Pin-controllogic inputs allow for operation with switchingsensors that do not use a microcontroller. For sensors thatuse a microcontroller, an SPI interface is available withextensive diagnostics. For IO-Link operation, a three-wireUART interface is provided, allowing interfacing to themicrocontroller UART. Finally, a multiplexed UART/SPIoption allows using one serial microcontroller interface forshared SPI and UART interfaces.The device includes on-board 3.3V and 5V linearregulators for low-noise analog/logic supply rails.The MAX14827 is available in a (4mm × 4mm) 24-pinTQFN package and a (2.5mm × 2.5mm) 25-pin wafer-levelpackage (WLP) and is specified over the extended-40°C to +125°C temperature range.ApplicationsIndustrial SensorsIO-Link Sensors and ActuatorsSafety Applications

Please see the MAX14827A for our recommended replacement.The MAX14827 integrates the high-voltage functionscommonly found in industrial sensors, including driversand regulators. The MAX14827 features two ultra lowpowerdrivers with active reverse-polarity protection.Operation is specified for normal 24V supply voltagesup to 60V. Transient protection is simplified due to highvoltage tolerance allowing the use of micro TVS.The device features a flexible control interface. Pin-controllogic inputs allow for operation with switchingsensors that do not use a microcontroller. For sensors thatuse a microcontroller, an SPI interface is available withextensive diagnostics. For IO-Link operation, a three-wireUART interface is provided, allowing interfacing to themicrocontroller UART. Finally, a multiplexed UART/SPIoption allows using one serial microcontroller interface forshared SPI and UART interfaces.The device includes on-board 3.3V and 5V linearregulators for low-noise analog/logic supply rails.The MAX14827 is available in a (4mm × 4mm) 24-pinTQFN package and a (2.5mm × 2.5mm) 25-pin wafer-levelpackage (WLP) and is specified over the extended-40°C to +125°C temperature range.ApplicationsIndustrial SensorsIO-Link Sensors and ActuatorsSafety Applications

The MAX14832 is a 24V, 100mA driver for industrial binary sensors. The device is configurable through one-time programming (OTP) and integrates the common high-voltage circuitry needed for industrial binary sensors into a single-device solution. Integrated transient protection meets IEC60255-5 surges up to ±1.3kV.The output of the device can be configured for high-side (pnp), low-side (npn), or push-pull operation through OTP. Additionally, the device features an OTP option for the internal low-dropout (LDO) regulator, allowing the user to select a 3.3V or 5V output, as well as an option to configure the device for sensors with normally open (NO) or normally closed (NC) logic. Also configurable during OTP is the timing of the power-on reset (POR) delay. OTP programming options are performed with the sensor interface pins (VCC, DO, and GND) using the 1-Wire® interface protocol.The MAX14832 operates from a wide 4.75V to 34V supply and is available in a 10-pin TDFN-EP (3mm x 3mm) package and 9-bump wafer-level package (WLP) (1.6mm x 2.0mm). The device functions over the extended -40°C to +85°C temperature range.ApplicationsCapacitive and Inductive SensorsIndustrial Binary SensorsProximity Switches

The MAX14836 transceiver is suitable for 24V binarysensors. Additional 24V digital inputs and outputs areprovided. Two internal linear regulators generate commonsensor power requirements: 5V and 3.3V.On-board DIO and DO drivers are independentlyconfigurable for push-pull, high-side (pnp), or low-side(npn) operation. The device detects a wake-up conditionand generates a wake-up signal on the active-low WUoutput.An SPI interface allows configuration and monitoring ofthe devices. Extensive alarm conditions are detected andcommunicated through the active-low IRQ output and the SPI interface.The device features reverse-polarity, short-circuit,and thermal protection. All power lines are monitored forundervoltage conditions.Both DIO and DO drivers are specified for sinking/sourcing200mA.The MAX14836 is available in a 4mm x 4mm, 24-pinTQFN package, and is specified over the -40°C to +105°Ctemperature range.ApplicationsIndustrial Sensors

The MAX14838/MAX14839 24V/100mA drivers areoptimized for use in industrial sensors. These devicesintegrate all of the high-voltage (24V) circuitry commonlyfound in industrial sensors, including a configurable PNP/NPN/push-pull driver and an integrated linear regulatorthat meets common sensor power requirements.The MAX14838/MAX14839 are pin-configurable. Logicinputs allow the driver to be configured for high-side(PNP), low-side (NPN), or push-pull operation. Anadditional input allows the user to select between normally-open and normally-closed logic.The MAX14838 features an onboard 5V linear regulator,while the MAX14839 features a 3.3V linear regulator.Each device includes two LED drivers for visual feedback.One LED driver reflects the output logic status and theother is a general-purpose driver that can be used tosignal a fault condition.The DO output, supply (VCC), and ground (GND) pins arereverse polarity-protected and are protected against IECESD and surge events.The MAX14838 and MAX14839 operate from a wide supplyrange and are available in a 12-pin TDFN-EP package(3mm x 3mm) or a 12-bump wafer-level package (WLP)(2.1mm x 1.6mm) and operate over the -40°C to +105°Ctemperature range.ApplicationsCapacitive and Inductive SensorsIndustry Binary SensorsProximity Switches

The MAX14838/MAX14839 24V/100mA drivers areoptimized for use in industrial sensors. These devicesintegrate all of the high-voltage (24V) circuitry commonlyfound in industrial sensors, including a configurable PNP/NPN/push-pull driver and an integrated linear regulatorthat meets common sensor power requirements.The MAX14838/MAX14839 are pin-configurable. Logicinputs allow the driver to be configured for high-side(PNP), low-side (NPN), or push-pull operation. Anadditional input allows the user to select between normally-open and normally-closed logic.The MAX14838 features an onboard 5V linear regulator,while the MAX14839 features a 3.3V linear regulator.Each device includes two LED drivers for visual feedback.One LED driver reflects the output logic status and theother is a general-purpose driver that can be used tosignal a fault condition.The DO output, supply (VCC), and ground (GND) pins arereverse polarity-protected and are protected against IECESD and surge events.The MAX14838 and MAX14839 operate from a wide supplyrange and are available in a 12-pin TDFN-EP package(3mm x 3mm) or a 12-bump wafer-level package (WLP)(2.1mm x 1.6mm) and operate over the -40°C to +105°Ctemperature range.ApplicationsCapacitive and Inductive SensorsIndustry Binary SensorsProximity Switches

The MAX14853/MAX14855 isolated RS-485/RS-422transceivers provide 2750VRMS (60s) of galvanic isolationbetween the cable-side (RS-485/RS-422 driver/receiver-side) and the UART-side of the device. Isolationimproves communication by breaking ground loops andreduces noise when there are large differences in groundpotential between ports. These devices allow for robustcommunication up to 500kbps (MAX14853) or 25Mbps(MAX14855).The MAX14853/MAX14855 include an integrated 450kHztransformer driver for power transfer to the cable-side ofthe transceiver using an external transformer. An integratedLDO provides a simple and space-efficient architecturefor providing power to the cable-side of the IC.The MAX14853/MAX14855 include one drive channeland one receive channel. The receiver is ¼-unit load,allowing up to 128 transceivers on a common bus.Integrated true fail-safe circuitry ensures a logic-high onthe receiver output when inputs are shorted or open.Undervoltage lockout disables the driver when cable-sideor UART-side power supplies are below functional levels.The driver outputs and receiver inputs are protectedfrom ±35kV electrostatic discharge (ESD) to GNDB onthe cable-side, as specified by the Human Body Model(HBM).The MAX14853/MAX14855 are available in a wide body16-pin SOIC package and operate over the -40°C to+105°C temperature range.ApplicationsHVACIndustrial Automation EquipmentPower MetersProgrammable Logic Controllers

The MAX14853/MAX14855 isolated RS-485/RS-422transceivers provide 2750VRMS (60s) of galvanic isolationbetween the cable-side (RS-485/RS-422 driver/receiver-side) and the UART-side of the device. Isolationimproves communication by breaking ground loops andreduces noise when there are large differences in groundpotential between ports. These devices allow for robustcommunication up to 500kbps (MAX14853) or 25Mbps(MAX14855).The MAX14853/MAX14855 include an integrated 450kHztransformer driver for power transfer to the cable-side ofthe transceiver using an external transformer. An integratedLDO provides a simple and space-efficient architecturefor providing power to the cable-side of the IC.The MAX14853/MAX14855 include one drive channeland one receive channel. The receiver is ¼-unit load,allowing up to 128 transceivers on a common bus.Integrated true fail-safe circuitry ensures a logic-high onthe receiver output when inputs are shorted or open.Undervoltage lockout disables the driver when cable-sideor UART-side power supplies are below functional levels.The driver outputs and receiver inputs are protectedfrom ±35kV electrostatic discharge (ESD) to GNDB onthe cable-side, as specified by the Human Body Model(HBM).The MAX14853/MAX14855 are available in a wide body16-pin SOIC package and operate over the -40°C to+105°C temperature range.ApplicationsHVACIndustrial Automation EquipmentPower MetersProgrammable Logic Controllers

The MAX14853/MAX14855 isolated RS-485/RS-422transceivers provide 2750VRMS (60s) of galvanic isolationbetween the cable-side (RS-485/RS-422 driver/receiver-side) and the UART-side of the device. Isolationimproves communication by breaking ground loops andreduces noise when there are large differences in groundpotential between ports. These devices allow for robustcommunication up to 500kbps (MAX14853) or 25Mbps(MAX14855).The MAX14853/MAX14855 include an integrated 450kHztransformer driver for power transfer to the cable-side ofthe transceiver using an external transformer. An integratedLDO provides a simple and space-efficient architecturefor providing power to the cable-side of the IC.The MAX14853/MAX14855 include one drive channeland one receive channel. The receiver is ¼-unit load,allowing up to 128 transceivers on a common bus.Integrated true fail-safe circuitry ensures a logic-high onthe receiver output when inputs are shorted or open.Undervoltage lockout disables the driver when cable-sideor UART-side power supplies are below functional levels.The driver outputs and receiver inputs are protectedfrom ±35kV electrostatic discharge (ESD) to GNDB onthe cable-side, as specified by the Human Body Model(HBM).The MAX14853/MAX14855 are available in a wide body16-pin SOIC package and operate over the -40°C to+105°C temperature range.ApplicationsHVACIndustrial Automation EquipmentPower MetersProgrammable Logic Controllers

The MAX14857/MAX14859 isolated RS-485/RS-422 transceivers provide 5000VRMS (60s) of galvanic isolation between the cable-side (RS-485/RS-422 driver/receiver-side) and the UART-side of the device. Isolation improves communication by breaking ground loops andreduces noise when there are large differences in groundpotential between ports. These devices allow for robustcommunication up to 500kbps (MAX14857) or 25Mbps(MAX14859).The devices include an integrated 450kHz transformerdriver for power transfer to the cable-side of the transceiverusing an external transformer. An integrated LDO providesa simple and space-efficient architecture for providingpower to the cable-side of the IC.The devices include one drive channel and one receivechannel. The receiver is ¼-unit load, allowing up to 128transceivers on a common bus.Integrated true fail-safe circuitry ensures a logic-high onthe receiver output when inputs are shorted or open.Undervoltage lockout disables the driver when cable-sideor UART-side power supplies are below functional levels.The driver outputs and receiver inputs are protectedfrom ±35kV electrostatic discharge (ESD) to GNDB onthe cable-side, as specified by the Human Body Model(HBM).The MAX14857/MAX14859 are available in a wide body16-pin SOIC package and operate over the -40°C to +105°Ctemperature range.ApplicationsHVACIndustrial Automation EquipmentPower MetersProgrammable Logic Controllers

The MAX14866 is a 16-channel, high-voltage (HV), analog SPST switch primarily intended for HV multiplexing in ultrasound applications.The MAX14866 operates from one only low-voltage supply (+5V) and does not require dedicated HV supplies, resulting in cost-saving and system simplification. Moreover, for in-probe applications, HV supplies do not need to be associated with the MAX14866 in the probe/transducer head, resulting in greater safety and easier compliance with safety regulations.The MAX14866 features best-in-class performance in terms of bandwidth (up to 50MHz), charge injection (PKPK). The low-signal switch RDSON is typically about 7Ω around 0V and remains flat in the entire input range ensuring extremely good linearity.The latchup-free SOI (Silicon-on-Insulator) technology and the wide analog range results in extremely high robustness during undershoots and overshoots that occur in ultrasound systems due to the resonant nature of the load.The status of the switches can be individually controlled through a high-speed SPI interface (up to 30MHz). Daisy-chain architecture is supported.Alternatively, switches can also be controlled with global control signal (SET and CLR) for bank selections or relay replacement applications.The MAX14866 is offered in two different packages: wafer-level packages (WLPs) and TQFNs. The 110-bump WLP size is only 5.53 x 5.47mm, resulting in less than 1.9mm2/channel footprint and allowing for very high levels of integration, which is especially beneficial for in-probe applications.The size of the TQFN package is an industry standard 48-pin, 7mm x 7mm package.ApplicationsMedical Ultrasound ImagingNDTPrintersRelays replacements

The MAX20446 is a 6-channel backlight driver with boostcontroller for automotive displays. The integrated currentoutputs can sink up to 130mA LED current each. Thedevice accepts a wide 4.5V to 36V input voltage rangeand withstands direct automotive load-dump events.The internal current-mode switching DC-DC controllersupports boost or SEPIC topologies and operates in thefrequency range 400kHz to 2.2MHz. Integrated spread spectrumhelps reduce EMI. An adaptive output-voltagecontrol scheme minimizes power dissipation in the LEDcurrent-sink paths.The device features I2C-controlled pulse-widthmodulation (PWM) dimming and hybrid dimming. In eithercase the minimum pulse width is 500ns. Phase-shifteddimming of the strings is incorporated for lower EMI.Comprehensive diagnostic information is also availablevia the I2C interface.The MAX20446 is available in a TQFN package andoperates in the -40°C to 125°C temperature range.Design Solution: Overcome the Design Challenges of New Automotive Display Backlights ›ApplicationsCentral Information DisplaysInfotainment DisplaysInstrument Clusters

The MAX20446 is a 6-channel backlight driver with boostcontroller for automotive displays. The integrated currentoutputs can sink up to 130mA LED current each. Thedevice accepts a wide 4.5V to 36V input voltage rangeand withstands direct automotive load-dump events.The internal current-mode switching DC-DC controllersupports boost or SEPIC topologies and operates in thefrequency range 400kHz to 2.2MHz. Integrated spread spectrumhelps reduce EMI. An adaptive output-voltagecontrol scheme minimizes power dissipation in the LEDcurrent-sink paths.The device features I2C-controlled pulse-widthmodulation (PWM) dimming and hybrid dimming. In eithercase the minimum pulse width is 500ns. Phase-shifteddimming of the strings is incorporated for lower EMI.Comprehensive diagnostic information is also availablevia the I2C interface.The MAX20446 is available in a TQFN package andoperates in the -40°C to 125°C temperature range.Design Solution: Overcome the Design Challenges of New Automotive Display Backlights ›ApplicationsCentral Information DisplaysInfotainment DisplaysInstrument Clusters

The MAX20730 is a fully integrated, highly efficient switchingregulator with PMBus™ for applications operating from4.5V to 16V and requiring up to 25A (max) load. Thissingle-chip regulator provides extremely compact, highefficiencypower-delivery solutions with high-precisionoutput voltages and excellent transient response fornetworking, datacom, and telecom equipment.The IC offers a broad range of programmable featuresthrough either the PMBus or a capacitor and resistorconnected to a dedicated programming pin. Using thisfeature, the operation can be optimized for a specificapplication, reducing the component count and/or settingappropriate trade-offs between the regulator’s performanceand system cost. Ease of programming enables using thesame design for multiple applications.The IC includes protection and telemetry features. Positiveand negative cycle-by-cycle overcurrent protection andovertemperature protection ensure a rugged design.Input undervoltage lockout shuts down the device toprevent operation when the input voltage is out ofspecification. A status pin provides an output signal toshow that the output voltage is within range and thesystem is regulating.

The MAX20733 is a fully integrated, highly efficientswitching regulator for applications operating from 4.5V to16V and requiring up to 35A maximum load. This singlechipregulator provides extremely compact, high-efficiencypower-delivery solutions with high-precision outputvoltages and excellent transient respondse for networking,datacom, and telecom equipment.The IC offers a broad range of programmable featuresthrough capacitors and resistors connected to dedicatedprogramming pins. Using this feature, the operation canbe optimized for a specific application, reducing thecomponent count- and/or setting-appropriate trade-offsbetween the regulator's performance and system cost.Ease of programming enables using the same design formultiple applications.The MAX20733 includes protection capabilities. Positiveand negative cycle-by-cycle overcurrent protection andovertemperature protection ensure a rugged design. Inputundervoltage lockout shuts down the device to preventoperation when the input voltage is out of specification. Astatus pin provides an output signal to show that the outputvoltage is within range and the system is regulating.ApplicationsµP ChipsetsCommunications EquipmentI/OMemory VDDQNetworking EquipmentPoint-of-Load Voltage RegulatorsServers and Storage Equipment

The MAX20733 is a fully integrated, highly efficientswitching regulator for applications operating from 4.5V to16V and requiring up to 35A maximum load. This singlechipregulator provides extremely compact, high-efficiencypower-delivery solutions with high-precision outputvoltages and excellent transient respondse for networking,datacom, and telecom equipment.The IC offers a broad range of programmable featuresthrough capacitors and resistors connected to dedicatedprogramming pins. Using this feature, the operation canbe optimized for a specific application, reducing thecomponent count- and/or setting-appropriate trade-offsbetween the regulator's performance and system cost.Ease of programming enables using the same design formultiple applications.The MAX20733 includes protection capabilities. Positiveand negative cycle-by-cycle overcurrent protection andovertemperature protection ensure a rugged design. Inputundervoltage lockout shuts down the device to preventoperation when the input voltage is out of specification. Astatus pin provides an output signal to show that the outputvoltage is within range and the system is regulating.ApplicationsµP ChipsetsCommunications EquipmentI/OMemory VDDQNetworking EquipmentPoint-of-Load Voltage RegulatorsServers and Storage Equipment

The MAX20734 is a fully integrated, highly efficient switching regulator with PMBus™ for applications operating from 4.5V to 16V and requiring up to 40A (max) load. This single-chip regulator provides extremely compact, high-efficiency power-delivery solutions with high-precision output voltages and excellent transient response for networking, datacom, and telecom equipment. The IC offers a broad range of programmable features through either the PMBus or a capacitor and resistorconnected to a dedicated programming pin. Using this feature, the operation can be optimized for a specificapplication, reducing the component count and/or setting appropriate trade-offs between the regulator’s performance and system cost. Ease of programming enables using thesame design for multiple applications.The IC includes protection and telemetry features. Positive and negative cycle-by-cycle overcurrent protection and overtemperature protection ensure a rugged design. Input undervoltage lockout shuts down the device to prevent operation when the input voltage is out of specification. A status pin provides an output signal to show that the output voltage is within range and the system is regulating.PMBus is a trademark of SMIF, Inc.ApplicationsCommunications EquipmentI/OMemory VDDQNetworking EquipmentPoint-of-Load Voltage RegulatorsServers and Storage EquipmentμP Chipsets