Specification	MAX8971GEWP+

Battery Chemistry [custom]	Lithium Ion/Polymer
Battery Pack Voltage	4.35 V, 4.15 V, 4.1 V, 4.2 V
Charge Current - Max	1.55 A
Current - Charging	Constant - Programmable
Fault Protection	Reverse Battery, Over Voltage
Interface	USB, I2C
Mounting Type	Surface Mount
Number of Cells	1
Operating Temperature [Max]	85 C
Operating Temperature [Min]	-40 ¯C
Package / Case	WLBGA, 20-WFBGA
Programmable Features	Timer, Current, Voltage
Supplier Device Package	20-WLP
Supplier Device Package [x]	1.62
Supplier Device Package [y]	2.18
Voltage - Supply (Max) [Max]	7.5 V

MAX8971 Series

Part	Battery Pack Voltage	Fault Protection	Charge Current - Max	Interface	Number of Cells	Mounting Type	Supplier Device Package [x]	Supplier Device Package [y]	Supplier Device Package	Programmable Features	Battery Chemistry [custom]	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Current - Charging	Voltage - Supply (Max) [Max]	Supplied Contents	Contents	Function	Utilized IC / Part	Type
Analog Devices Inc./Maxim Integrated MAX8971CEWP+	4.2 V	Over Voltage Reverse Battery	1.55 A	I2C USB	1	Surface Mount	1.62	2.18	20-WLP	Current	Lithium Ion	85 C	-40 ¯C	20-WFBGA WLBGA	Constant - Programmable	7.5 V
Analog Devices Inc./Maxim Integrated MAX8971EVKIT#																	Board(s)	Board(s)	Battery Charger	MAX8971	Power Management
Analog Devices Inc./Maxim Integrated MAX8971GEWP+T	4.2 V	Over Voltage Reverse Battery	1.55 A	I2C USB	1	Surface Mount	1.62	2.18	20-WLP	Current	Lithium Ion	85 C	-40 ¯C	20-WFBGA WLBGA	Constant - Programmable	7.5 V
Analog Devices Inc./Maxim Integrated MAX8971BEWP+T	4.1 V 4.15 V 4.2 V 4.35 V	Over Voltage Reverse Battery	1.55 A	I2C USB	1	Surface Mount	1.62	2.18	20-WLP	Current	Lithium Ion/Polymer	85 C	-40 ¯C	20-WFBGA WLBGA	Constant - Programmable	7.5 V
Analog Devices Inc./Maxim Integrated MAX8971EWP+T	4.2 V	Over Voltage Reverse Battery	1.55 A	I2C USB	1	Surface Mount	1.62	2.18	20-WLP	Current	Lithium Ion	85 C	-40 ¯C	20-WFBGA WLBGA	Constant - Programmable	7.5 V
Analog Devices Inc./Maxim Integrated MAX8971GEWP+	4.1 V 4.15 V 4.2 V 4.35 V	Over Voltage Reverse Battery	1.55 A	I2C USB	1	Surface Mount	1.62	2.18	20-WLP	Current Timer Voltage	Lithium Ion/Polymer	85 C	-40 ¯C	20-WFBGA WLBGA	Constant - Programmable	7.5 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	N/A	0	$ 0.00
		2500	$ 0.00

Description

General part information

MAX8971 Series

The MAX8971 is a compact, high-frequency, high-efficiency switch-mode charger for a one-cell lithium-ion (Li+) battery. It delivers up to 1.55A of current to the battery from inputs up to 7.5V and withstands transient inputs up to 22V. The 4MHz switch-mode charger is ideally suited for small portable devices, such as Bluetooth®headsets, AR/VR glasses, and other lithium-ion powered accessories. It minimizes component size and heat.Battery-protection features include: low-voltage prequalification, charge fault timer, die temperature monitoring, and battery temperature monitoring. The battery temperature monitoring adjusts the charge current and termination voltage for safe use of secondary lithium-ion batteries.The IC accepts either a general DC input or USB. It has programmable automatic input-current limiting to protect upstream charging sources such as USB.Charge parameters are easily adjustable through an I²C interface. Charge is terminated based on user-selectable minimum current level. Charge status is provided to the application processor through an interrupt pin.The IC is available in a space-saving, 20-bump, 2.18mm x 1.62mm WLP package.ApplicationsAR/VR GlassesBluetooth HeadsetsHearablesPortable DevicesSmartphonesUSB ChargingWearables

Documents

Technical documentation and resources

MAX8971 Reliability Data

Reliability Data

MAX8971: Industry's Smallest 1.55A 1-Cell Li+ DC-DC Charger Data Sheet (Rev.3)

Data Sheet