MAX14720:Power-Management Solution

Extend Battery Life of Wearable Electronics

The MAX14720/MAX14750 are compact power-management solutions for space-constrained, battery-powered applications where size and efficiency are critical. Both devices integrate a power switch, a linear regulator, a buck regulator, and a buck-boost regulator. The MAX14720 is designed to be the primary power-management device and is ideal for either non-rechargeable battery (coin-cell, dual alkaline) applications or for rechargeable solutions where the battery is removable and charged separately. The device includes a button monitor and sequencer. The MAX14750 works well as a companion to a charger or PMIC in rechargeable applications. It provides direct pin control of each function and allows greater flexibility for controlling sequencing. The devices include two programmable micro-IQ, high-efficiency switching converters: a buck-boost regulator and a synchronous buck regulator. These regulators feature a burst mode for increased efficiency during light-load operation. The low-dropout linear regulator has a programmable output. It can also operate as a power switch that can disconnect the quiescent load of system peripherals. The devices also include a power switch with battery-monitoring capability. The switch can isolate the battery from all system loads to maximize battery life when not operating. It is also used to isolate the battery-impedance measurements. This switch can operate as a general-purpose load switch as well. The MAX14720 includes a programmable power controller that allows the device to be configured either for use in applications that require a true off state or for always-on applications. This controller provides a delayed reset signal, voltage sequencing, and customized button timing for on/off control and recovery hard reset. Both devices also include a multiplexer for monitoring the power inputs and outputs of each function. These devices are available in a 25-bump, 0.4mm pitch, 2.26mm x 2.14mm wafer-level package (WLP) and operate over the -40°C to +85°C extended temperature range.

Key Features
  • Extended System Battery Use Time
    • Micro-IQ 250mW Buck-Boost Regulator
      • Input Voltage from 1.8V to 5.5V
      • Output Voltage Programmable from 2.5V to 5V
      • 1.1µA Quiescent Current
      • Programmable Current Limit
    • Micro-IQ 200mA Buck Regulator
      • Input Voltage from 1.8V to 5.5V
      • Output Voltage Programmable from 1.0V to 2.0V
      • 0.9µA Quiescent Current
    • Micro-IQ 100mA LDO
      • Input Voltage From 1.71V to 5.5V
      • Output Programmable From 0.9V to 4.0V
      • 0. 9µA Quiescent Current
      • Configurable as Load Switch
  • Extend Product Shelf-Life
    • Battery Seal Mode (MAX14720)
      • 120nA Battery Current
    • Power Switch On-Resistance
      • 250mΩ (max) at 2.7V
      • 500mΩ (max) at 1.8V
    • Battery Impedance Detector
  • Easy-to-Implement System Control
    • Configurable Power Mode and Reset Behavior (MAX14720)
      • Push-Button Monitoring to Enable Ultra-Low Power Shipping Mode
      • Disconnects All Loads From Battery and Reduces Leakage to Less than 1µA
      • Power-On Reset (POR) Delay and Voltage Sequencing
    • Individual Enable Pins (MAX14750)
    • Voltage Monitor Multiplexer
    • I2C Control Interface
MAX14750: Typical Application Circuit
MAX14750: Typical Application Circuit
  • Portable Medical Devices
  • Wearable Fitness Devices
  • Wearable Medical Devices
titleDownload file
MAX14720-MAX14750 Data SheetMAX14720-MAX14750.pdf
Part NumberPrimary TopologyMonitor/Control FeaturesDC-DC/Power FeaturesInterface TypeVIN
Oper. Freq.
minmaxminmaxSee Notes
Reset Output
Serial Interface
Current Limit
Fixed Freq./PWM
Internal Switch
Soft Start
Sync. Rectifier
I2C1.85.50.950.20.22000WLP/25$2.59 @1k
Design kits & evaluation modules
Related Products
  • MAX14676:Wearable Charge Management Solution
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX14720AEWA+ActiveWLP,;25 pin;WLP;-40°C to +85°CLead Free
MAX14720AEWA+TActiveWLP,;25 pin;WLP;-40°C to +85°CLead Free
MAX14720EWA+ActiveWLP,;25 pin;WLP;-40°C to +85°CLead Free
MAX14720-MAX14750.pdf MAX14750