General Description

The MAX17332 is a 35μA IQ 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 IC regulates charging

by modulating the charge N-FET, using AccuCharge™

charger technology. The IC 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 IC 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 voltagebased

fuel gauge to provide industry-leading accuracy.

The IC automatically compensates for cell aging, temperature,

and discharge rate while providing accurate state-ofcharge

(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.

Benefits and Features

● Non-Volatile Programmable Stand-Alone Charger

• 1 Charge Current, 256 Current Settings

• 0.25 Charge Voltage, 2.42V to 4.8V, Configurable

• Optional Manual Charge Control

• FET Temperature Limit and Heat Regulation

• Prequal, SmartFull, and Step-Charging Options

• JEITA—9 Temperature Regions

● Battery Health + Programmable Safety/Protection

• Overvoltage/Overcharge Current

• Temperature Region Dependent

• Overcharge/Discharge/Short-Circuit Current

• Over/Under Temperature

• Zero-Volt or >1.8V Charging Option

• Undervoltage + SmartEmpty

● Pushbutton Wakeup/Factory Ship Mode (0.5μA)

● ModelGauge m5 EZ Algorithm

• Percent, Capacity,Time-to-Empty/Full, Age

• Cycle+™ Age Forecast + Age-Scheduled Charging

● Dynamic Power—Estimates Power Capability

● SHA-256 Authentication to Prevent Cloning

● Precision Measurement Without Calibration

• Current, Voltage, Power, Time, Cycles

• Die Temperature and two Thermistors

● History Logging, User Data

● Low Quiescent Current

• FETs Enabled: 35μA Active, 21μA Hibernate

• FETs Disabled: 8μA Ship, 0.5μA Shutdown

● 2-Wire (I2C) and 1-Wire®

● 1.9 mm x 2.5 mm 15-Bump 0.5mm Pitch Wafer-Level Package (WLP)

Applications

• USB PPS and Direct Charging • Smart Batteries and

Hybrid Supercap Batteries • Dual Screen Smartphones,

Tablets • Hearables, Wearables, Smartwatches • Medical

Devices, Health, Fitness Monitors • Handheld Radios,

Computers, Accessories • Home/Building Automation,

Sensors, Cameras • Parallel Battery AR/VR Systems