MAX14720

Power-Management Solution

Extend Battery Life of Wearable Electronics


Description

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.

MAX14750: Typical Application Circuit MAX14750: Typical Application Circuit Enlarge+

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

Applications/Uses

  • Portable Medical Devices
  • Wearable Fitness Devices
  • Wearable Medical Devices
Part Number Primary Topology Monitor/Control Features DC-DC/Power Features Interface Type VIN
(V)
VIN
(V)
VOUT
(V)
VOUT
(V)
Max. IOUT
(A)
Max. IOUT
(A)
Oper. Freq.
(kHz)
Package/Pins Budgetary
Price
min max min max See Notes
MAX14720 
Step-Down
Step-Up/Down
Reset Output
Serial Interface
Shutdown
Current Limit
Fixed Freq./PWM
Internal Switch
Soft Start
Sync. Rectifier
I2C 1.8 5.5 0.9 5 0.2 0.2 2000
WLP/25
$2.59 @1k
MAX14750 
WLP/25
See All Multifunction PMICs (70)
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.


MAX14750EVKIT: Evaluation Kit for the MAX14720/MAX14750

Quality and Environmental Data

Request Reliability Report for: MAX14720 
Lead-Free Package Tin (Sn) Whisker Reports

Related Resources


MAX14745
Wearable Charge-Management Solution

  • Extend System Use Time Between Battery Charging
  • Easy-to-Implement Li+ Battery Charging
  • Minimize Solution Footprint Through High Integration