LTC3305
RECOMMENDED FOR NEW DESIGNSLead Acid Battery Balancer
- Part Models
- 4
- 1ku List Price
- Starting From $10.44
Overview
- Single IC Balances Up to Four 12V Lead-Acid Batteries in Series
- All NFET Design
- Stackable to Balance Larger Series Battery Packs
- Standalone Balancing Operation:
- Requires No External μP or Additional Control Circuitry
- Balancing Current Limited by External PTC Thermistor
- Continuous Mode and Timer Mode
- Programmable UV and OV Fault Thresholds
- Programmable Termination Time and Termination Voltage
- Thermally Enhanced 38-Lead TSSOP Package
- Click here to read "Life Extension Through Charge Equalization of Lead-Acid Batteries" on IEEE Xplore
The LTC3305 balances up to 4 lead-acid batteries connected in series. It is intended to be used in conjunction with a separate pre-existing battery charger as part of a high performance battery system. All voltage monitoring, gate drive, and fault detection circuitry is integrated.
The LTC3305 employs an auxiliary battery or an alternative storage cell to transfer charge to or from each individual battery in the stack. A mode pin provides two operating modes, timer mode and continuous mode. In timer mode, once the balancing operation is completed, the LTC3305 goes into a low power state for a programmed time and then periodically rebalances the batteries. In continuous mode, the balancing operation continues even after the batteries are balanced to their programmed termination voltage.
The LTC3305 is available in a thermally enhanced 38-lead TSSOP package.
Applications
- Telecom Backup Systems
- Home Battery Powered Backup Systems
- Industrial Electric Vehicles
- Energy Storage Systems (ESS)
- Medical Equipment
Documentation
Data Sheet 1
User Guide 1
Design Note 1
Video 2
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 |
|---|---|---|---|
| LTC3305EFE#PBF | 38-Lead TSSOP w/ EP | ||
| LTC3305EFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LTC3305IFE#PBF | 38-Lead TSSOP w/ EP | ||
| LTC3305IFE#TRPBF | 38-Lead TSSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 18, 2026 - 26_0072 Epoxy Change for Select TSSOP Products |
||
| LTC3305EFE#PBF | PRODUCTION | |
| LTC3305EFE#TRPBF | PRODUCTION | |
| LTC3305IFE#PBF | PRODUCTION | |
| LTC3305IFE#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LTC3305EFE#PBF | PRODUCTION | |
| LTC3305EFE#TRPBF | PRODUCTION | |
| LTC3305IFE#PBF | PRODUCTION | |
| LTC3305IFE#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Battery Charger ICs 1 | ||
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| Parts | Product Life Cycle | Description |
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| LT8584 | RECOMMENDED FOR NEW DESIGNS | 2.5A Monolithic Active Cell Balancer with Telemetry Interface |
| LTC3300-1 | RECOMMENDED FOR NEW DESIGNS | High Efficiency Bidirectional Multicell Battery Balancer |
| LTC3300-2 | RECOMMENDED FOR NEW DESIGNS | Addressable High Efficiency Bidirectional Multicell Battery Balancer |
Evaluation Kits
LTC3305EFE Demo Board | Lead Acid Battery Balancer for 2-4 Cells