Power & Battery Management Solutions for Smart Home

The MAX77540 is a high-efficiency step-down converter with two 3A switching phases. It uses an adaptive COT (constant on-time) current-mode control architecture and the two 3A switching phases can be configured as either one (2Φ, 6A) or two (1Φ, 3A each) outputs. Its wide input voltage range enables a direct conversion for sub-1V outputs from 3-cell Li+ batteries, USB PD, and 12V_DC supply rails. The output voltages are preset with resistors and are further adjustable through an I²C-compatible interface. With 94% peak efficiency, low quiescent current, and compact solution size, the MAX77540 is ideal for battery powered, space-constraint equipment.

Programmable switching frequency, frequency tracking, and spread-spectrum allow easier system optimization for noise-sensitive applications. Dedicated EN, POK, and FPWM pins provide options for direct hardware control, while more programmable options, such as soft-start/stop and ramp-up/down slew-rates, are available through I²C. An array of built-in protections insures safe operation under abnormal operating conditions.

Applications

• 2/3-Cell Li+ and USB-C Power Delivery Systems
• Audio and Video Equipment
• Microprocessors, field-programmable gate arrays (FPGAs), digital signal processors (DSPs),andapplication-specific integrated circuits (ASICs)
• Networking and PCIe®/redundant array of inexpensive disks (RAID) Cards

The MAX77857 is a high-efficiency, high-performance buck-boost converter targeted for systems requiring a wide input voltage range (2.5V to 16V). It features 7A switching current and can supply up to 6A output current in buck mode and up to 4A in boost mode (Boost Ratio ≤ 1.3). It operates in PWM mode and implements an automatic SKIP mode to improve light-load efficiency.

The default output voltage is 5V when using internal feedback resistors. It can also be configured to any default output voltages between 3V and 15V when using external feedback resistors. The output voltage is adjustable dynamically through the I²C serial interface (see the Output Voltage Configuration section).

The SEL pin allows a single external resistor to program four different I²C interface slave addresses, four different switching current limit thresholds, and selection between external/internal feedback resistors. The different switching current limit thresholds allow the use of lower profile and smaller external components that are optimized for a particular application. The use of external feedback resistors allows for a wider output voltage range and customizable output voltages at startup.

The I²C serial interface is optional and allows for dynamically controlling the output voltage, slew rate of the output voltage change, switching-current limit threshold, switching frequency, and forced PWM mode operation. The I²C-programmed settings have priority over the R_SEL decoded settings.

The MAX77857 is available in a 2.83mm x 2.03mm, 35-bump and 31-bump wafer-level package (WLP) and a 3.5mm x 3.5mm, 16-lead Flip Chip QFN package (FC2QFN).

Applications

• USB Power Delivery (USB-PD) OTG
• Qualcomm^® Quick Charge^TM
• USB V_BUS Supply and DRP (Dual Role Power) Ports
• DSLR, DSLR Lens
• Display Power
• Up to 3-Cell Li-Ion Battery Applications
• Notebook Computer, Tablet PC

The MAX77932C is a standalone, dual-phase switched-capacitor converter with integrated power switches that delivers 8A output current and divides the input voltage by two. The IC is suitable for applications that utilize 2S Li+ batteries while powering circuitry that operates at 1S-equivalent voltage. It is also suitable for applications migrating from 1S to 2S battery configurations. The IC simplifies this migration by converting the 2S battery voltage to 1S-equivalent output and allows designers to preserve the existing downstream 1S power architecture.

The inductorless switched-capacitor converter topology of the IC shrinks the overall footprint and reduces the maximum height of the circuit. Its high switching frequency, up to 1.5MHz, reduces the size and number of capacitors required, further minimizing the solution footprint. The IC ensures safe operation with integrated overvoltage, undervoltage, overcurrent, and thermal protection, and also minimizes EMI with built-in frequency dithering. In addition to the small solution size, lower EMI, and protection features, the ICs class-leading peak efficiency of 98.5% simplifies thermal design and makes it ideal for consumer, medical, and industrial applications.

The IC features an I²C compatible, 2-wire serial interface consisting of a bidirectional serial data line (SDA) and a serial clock line (SCL). The IC supports SCL clock rates up to 3.4MHz. The converter parameters such as OCP, OVLO or UVLO thresholds, switching frequency, soft-start current, and duration are easily adjustable through the I²C interface. The IC consumes a low quiescent current of 30μA when operating and 4μA in shutdown. The IC is available in a tiny, lead-free 0.4mm pitch, 2.4mm x 2.8mm 42-pin wafer-level package (WLP).

Applications

• Smartphones and Tablets
• Ultrabook Computers
• Chromebooks
• DSLR and Mirrorless Cameras
• Power Banks
• 2S Li+ Battery Applications
• Smartphone Direct Charging
• Portable Printers
• Portable Gaming Devices
• Mobile Point-of-Sale (mPOS) Devices
• Two-Way Radios

The MAX17320 is a 38µA I_Q stand-alone pack-side fuel gauge IC with protector, battery internal self-discharge detection, and optional SHA-256 authentication for 2 to 4 series lithium-ion/polymer batteries.

The IC monitors the voltage, current, temperature and state of the battery to provide protection against over/undervoltage, overcurrent, short-circuit, over/undertemperature, overcharge, and internal self-discharge conditions using external high-side N-FETs, and provides charging prescription to ensure that the battery operates under safe conditions, thereby prolonging the life of the battery. The IC balances the cells using internal FETs. During prequal charging, the IC uses the CHGFET to linearly control charging.

To prevent battery pack cloning, the IC integrates SHA-256 authentication with a 160-bit secret key. Each IC incorporates a unique 64-bit ID.

The fuel gauge uses Maxim ModelGauge™ m5 algorithm that combines the short-term accuracy and linearity of a coulomb counter with the long-term stability of a voltage-based fuel gauge to provide industry-leading fuel gauge accuracy. The IC automatically compensates for cell aging, temperature, and discharge rate, and provides accurate state-of-charge (SOC) in milliampere-hours (mAh) or percentage (%) over a wide range of operating conditions.

The IC provides a configurable always-on LDO that can power small critical loads on the system side without overloading the cells even under fault conditions. Dynamic power functionality provides the instantaneous maximum battery output power which can be delivered to the system without violating the minimum system input voltage.

A Maxim 1-Wire^® or 2-wire I²C/SMBus interface provides access to data and control registers. The IC is available in a lead-free, 2.4mm x 2.6mm 30-bump 0.4mm pitch WLP and 4mm x 4mm 24-pin TQFN packages.

Applications

• Digital Still, Video, and Action Cameras
• Handheld Computers, Radios, and Terminals
• Medical Devices, Health and Fitness Monitors
• Power Tools, Wireless Speakers, and Drones
• Smart Batteries and Battery Backup
• Smartphones, Tablets, and 2-in-1 Laptops

The MAX17330 is a 28μA I_Q stand-alone charger, fuel gauge, protector, and battery internal self-discharge detection IC for 1-cell lithium-ion/polymer batteries. When a voltage source is present, the MAX17330 regulates charging by modulating the charge N-FET, using AccuCharge™ charger technology. The MAX17330 regulates charge voltage, current, and FET temperature. Stand-alone charging is supported by flexible configuration in nonvolatile memory. The IC supports the following applications:

• Low-Power Charging
  • 1mA to 500mA directly from universal 5V USB
  • No USB identification/coordination needed
• High-Power Parallel Packs (>1000mA)
  • Independently charges parallel packs
  • Prevents cross-charging for parallel batteries
  • Coordinates external DC-DC with alerts
  • Minimizes dropout and heat
• Protection and Charging Control—pack or host side

The MAX17330 ideal diode circuit supports a quick response to system transients and adapter removal with low voltage drop across the CHG FET.

The IC uses the ModelGauge™ m5 EZ algorithm that combines the short-term accuracy and linearity of a coulomb counter with the long-term stability of a voltage-based fuel gauge to provide industry-leading accuracy. The IC automatically compensates for cell aging, temperature, and discharge rate while providing accurate state-of-charge (SOC) in milliampere-hours (mAh) or percentage (%) over a wide range of operating conditions.

The IC monitors the voltage, current, temperature, and state of the battery to provide protection against over/undervoltage, overcurrent, short-circuit, over/undertemperature and overcharge conditions, and internal self-discharge protection using external high-side N-FETs to ensure that the lithium-ion/polymer battery operates under safe conditions which prolongs the life of the battery.

Applications

• Dual Screen Smartphones, Tablets
• Handheld Radios, Computers, Accessories
• Hearables, Wearables, Smartwatches
• Home/Building Automation, Sensors, Cameras
• Medical Devices, Health, Fitness Monitors
• Parallel Battery AR/VR Systems
• Smart Batteries and Hybrid Supercap Batteries
• USB PPS and Direct Charging

The MAX77958 is a robust solution for USB Type-C CC detection and power delivery (PD) protocol implementation. It detects connected accessories or devices by using Type-C CC detection and USB PD messaging. The IC protects against overvoltage and overcurrent, and detects moisture and prevents corrosion on the USB Type-C connector. The IC also has a D+/D- USB switch and BC1.2 detection to support legacy USB standards. It contains V_CONN switches for USB PD and an enable pin for an external V_CONN boost or buck converter. When the USB PD negotiation is complete, the IC configures an alternate mode setting for external multiplexers.

The IC is compliant with USB Type-C Specification Release 1.3 and PD 3.0. It can be customized easily without affecting the compliance.

The IC has an I²C master that can read and write to other devices in the system so that its firmware can configure related devices without the main processor's assistance. For example, it can configure an external charger based on BC1.2 detection, CC detection, and PD communication.

The IC has an interrupt output pin to report event detection and status changes. It also has an I²C interface that the system can use to read/write and configure internal registers.

The IC has nine configurable GPIOs that can be used for detection, as interrupts, and as the enable/disable pin for external devices, or as ADC inputs.

The IC is available in a 3.10mm x 2.65mm, 0.5mm pitch, wafer-level package (WLP).

Applications

• Smartphones
• Tablets
• Cameras
• Game Players
• Power Banks
• Industrial Equipment PoE to USB Type-C Adapters
• Handheld Devices
• Portable Devices
• Monitors
• Healthcare and Medical Devices
• Other USB Type-C Devices

The MAX17330 evaluation kit is a fully assembled and tested surface-mount PCB that evaluates the stand-alone charger, fuel gauge IC with protector and optional SHA-256 authentication for 1 cell lithium-ion/polymer batteries.

The MAX17330 EV kits include the IC evaluation board with integrated I²C interface and USB micro-B cable. Windows^® based graphical user interface (GUI) software is available for use with the EV kit and can be downloaded from MAX17330 product page under Design Resources tab. Windows 7 or newer Windows operating system is required to use with the EV kit GUI software.

Applications

• Dual Screen Smartphones, Tablets
• Handheld Radios, Computers, Accessories
• Hearables, Wearables, Smartwatches
• Home/Building Automation, Sensors, Cameras
• Medical Devices, Health, Fitness Monitors
• Parallel Battery AR/VR Systems
• Smart Batteries and Hybrid Supercap Batteries
• USB PPS and Direct Charging