Compact Power Management ICs Boast Low Standby Power

Maxim Integrated Products.offers a pair of power management ICs (PMICs) aimed at designers of Bluetooth headphones, activity monitors, smart garments, smartwatches, and other size-constrained devices where battery life and efficiency are priorities.

Maxim 9065

The MAX77650 and MAX77651 feature single inductor multiple output (SIMO) buck-boost regulators that provide three independently programmable power rails from a single inductor, 150mA LDO, and three current sink drivers to reduce overall component count and maximize available board space. For design flexibility, the MAX77650 operates up to 3.3V and the MAX77651 operates up to 5V—both include an analog multiplexer (MUX) output for safe battery monitoring, making them ideal for low-power designs.

Size is critical for hearables and wearables as they continue moving to smaller form factors. Most PMICs for these small, lithium-ion battery-operated devices require additional components, such as boost, buck, and low dropout (LDO) regulators; a charger; and current regulators for LED indicators. For space-savings and efficiency, Maxim has integrated all these functions into a complete power solution that is only 19.2mm2—less than 1/2 the size of existing component combinations.

Key Advantages

  • Lowest Standby Power: 0.3µA; 5.6µA operating current
  • High Efficiency: 3-output SIMO channels plus LDO extend Li+ battery life
  • Small Size: Multi-channel SIMO regulator reduces component count

Availability and Pricing

  • MAX77650/MAX77651 are available from stock and priced at $1.99 (1,000-up, FOB USA)
  • MAX77650EVKIT# and MAX77651EVKIT# are available from stock and priced at $193.63 each

Maxim Integrated Products.| www.maximintegrated.com

Ultra-Small hSensor Platform for Wearable Apps

Maxim Integrated Products’s ultra-small hSensor Platform enables you to quickly develop wearable fitness and wellness-related prototypes. With it, you have all the necessary hardware on one PCB along with readily-accessible hardware functionality with the ARM mbed hardware development kit (HDK).Maxim health sensor

The hSensor Platform (MAXREFDES100# reference design) comprises an hSensor board that comes complete firmware with drivers, a debugger board, and a graphical user interface (GUI). The platform enables you to load algorithms for different applications.

The hSensor Platform includes the following: a MAX30003 ultra-low power, single-channel integrated biopotential AFE; a MAX30101 high-sensitivity pulse oximeter and heart-rate sensor; a MAX30205 clinical-grade temperature sensor; a MAX32620 ultra-low power ARM Cortex-M4F microcontroller optimized for wearables; a MAX14720 power management integrated circuit (PMIC); inertial sensors (three-axis accelerometer, six-axis accelerometer/gyroscope); a barometric pressure sensor; flash memory; and a Bluetooth Low Energy (BLE) radio.

The MAXREFDES100# costs $150. Hardware and firmware files are free.

Source: Maxim Integrated Products

Industrial IoT Reference Design for Fast Development

Intended to address security concerns in Industrial Internet of Things (IIoT) systems, Maxim Integrated Products’s MAXREFDES143# embedded security reference design enables you to protect your designs against counterfeit sensor data. Intended to simplify the development of secure, authenticated sensor-to-web data, the design is well suited for analog sensor node and data authentication in a variety of applications, including factory automation and industrial processing.Maxim MAXREFDES143

The reference design features a two-stage hierarchical architecture, an Arduino-compatible hardware interface, and ARM mbed libraries. The architecture consists of a shield that communicates to a web server and a protected sensor node for data acquisition and authentication. The shield comprises the following:

  • Wi-Fi module
  • Maxim Integrated Products DS2465 secure coprocessor for offloading SHA-256 cryptographic computation
  • 1-Wire and I2C interfaces
  • User-interface LCD, LEDs, and pushbuttons
  • Alarm and logging functions.

The sensor node comprises:

  • Maxim Integrated Products DS28E15 secure authenticator
  • DS7505 temperature sensor
  • MAX44009 light sensor.

The MAXREFDES143# IoT embedded security reference design is available for $75. Free hardware and firmware design files are posted online.

Source: Maxim Integrated Products