Power-Management Solution

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.

Design Solution: How to Add ECG to Your Wearable Without Raising Your Heart Rate ›

Applications

* Portable Medical Devices * Wearable Fitness Devices * Wearable Medical Devices

* 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