LTC3337

RECOMMENDED FOR NEW DESIGNS

Primary Battery SOH Monitor with Precision Coulomb Counter

Data Sheet (Rev. A) Product Selection Table

Part Models: 3
1ku List Price: Starting From $1.26

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Part Details

Battery Input Voltage Range: 1.8V to 5.5V
100nA Quiescent Current
8 Primary Battery Peak Input Current Limits: 5mA/10mA/15mA/20mA/25mA/50mA/75mA/100mA
SOH Monitor for Primary Battery
- Integrated Coulomb Counter (Q)
- Additional Monitors for Battery Voltage (V), Battery Impedance (Z), and Temperature (T)
Primary Battery Current (BAT_IN) or Load Current (BAT_OUT) is Counted

Integrated ±10mA Supercapacitor Balancer
Programmable Coulomb Counter Prescaler for Wide Range of Battery Sizes
Programmable Discharge Alarm Threshold with Interrupt Output
I²C Interface
Tiny 12-Lead 2mm × 2mm LFCSP and 16-Ball 1.64mm × 1.64mm WLCSP Packages

Part Models: 3
1ku List Price: Starting From $1.26

Documentation

Data Sheet 1

LTC3337 - Primary Battery SOH Monitor with Precision Coulomb Counter Data Sheet (Rev.A) 05/04/2021

User Guide 1

DC2973A - Demo Manual (Rev.0) 06/24/2021

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC3337ACBZ-R7	CHIPS W/SOLDER BUMPS/WLCSP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3337ERC#TRMPBF	12-Lead Plastic LFCSP (2mm × 2mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3337ERC#TRPBF	12-Lead Plastic LFCSP (2mm × 2mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

Device Drivers 1

LTC3337 GitHub no-OS Driver Source Code

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Tools & Simulations

LTpowerPlay®

LTpowerPlay® is a powerful, Windows-based development environment supporting Linear Technology's Digital Power System Management (PSM) products.

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Evaluation Kits

LTC3337 | Primary Battery SOH Monitor with Precision Coulomb Counter

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Product Details

Demonstration circuit 2973A shows the LTC3337 Primary Battery State of Health (SOH) monitor with precision coulomb counter operating with a configurable peak current limit. The LTC3337 supports input voltages from 1.8V to 5.5V and a peak current up to 100mA with a quiescent current of 100nA. Coulomb count, battery voltage, and Battery Series Resistance (BSR) are measurable and can be used to quantify the charge state and health of a battery.

The DC2973A demonstrates a simple layout for the highest-power configuration of the LTC3337. The circuit can be reduced for lower I_PEAK levels. The demo board can be connected directly to a PC using a micro USB cable in order to run a GUI and configure simple a Battery State of Charge (SOC) monitor. Source code for the GUI is available and can be used as a starting point for LTC3337 firmware development.