LTC4091
RECOMMENDED FOR NEW DESIGNS36V Battery Charger and Power Backup Manager
- Part Models
- 4
- 1ku List Price
- Starting From $4.92
Overview
- Seamless Transition Between Primary Power Source and Li-Ion Battery
- 2A High Voltage Step-Down Regulator with Adaptive Output Control
- Internal 75mΩ Ideal Diode Plus Optional External Ideal Diode Controller Provides Low Loss PowerPath™ When Primary Supply Not Present
- Wide Input Voltage Range: 6V to 36V (60V Abs Max)
- 4.45V Max Output Voltage
- Full Featured Li-Ion Battery Charger
- Pin Selectable 4.1V and 4.2V Charge Voltage Options
- Thermally Enhanced Low Profile (0.75mm) 6mm × 3mm 22-Lead DFN Package
The LTC4091 is a 36V Li-Ion battery charger and power backup manager. The integrated step-down switching regulator charges a battery from a primary power source while providing power to the load. If primary power is lost, the load is seamlessly transitioned to the backup Li-ion/polymer battery. To protect sensitive downstream loads, the maximum output voltage is 4.45V.
The LTC4091 provides an adaptive output that tracks the battery voltage for high efficiency charging. The charge current is programmable and an end-of-charge status output (CHRG) indicates full charge. Also featured is a termination timer and an NTC thermistor input used to monitor battery temperature while charging.
During backup, an internal 75mΩ ideal diode connects the battery to the load. An optional external ideal diode FET driver is available to reduce the voltage drop even further. 4.1V or 4.2V battery charge voltages can be selected.
Applications
- Fleet and Asset Tracking
- Automotive GPS Data Loggers
- Automotive Telematics Systems
- Battery Backup Systems
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
Brochure 1
Book & eBook 1
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 |
|---|---|---|---|
| LTC4091EDJC#PBF | 22-Lead DFN (6mm x 3mm w/ EP) | ||
| LTC4091EDJC#TRPBF | 22-Lead DFN (6mm x 3mm w/ EP) | ||
| LTC4091IDJC#PBF | 22-Lead DFN (6mm x 3mm w/ EP) | ||
| LTC4091IDJC#TRPBF | 22-Lead DFN (6mm x 3mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 14, 2025 - 25_0016 Bond Wire Change from Gold to Copper Wire (Notification Only) |
||
| LTC4091EDJC#PBF | PRODUCTION | |
| LTC4091EDJC#TRPBF | PRODUCTION | |
| LTC4091IDJC#PBF | PRODUCTION | |
| LTC4091IDJC#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 | ||
|
LTC4090 LTC4090-5 |
USB Power Manager with 2A High Voltage Bat-Track Buck Regulator | |
| Ideal Diodes and PowerPath Controllers 1 | ||
| LTC4417 | RECOMMENDED FOR NEW DESIGNS | Prioritized PowerPath™ Controller |
| Overvoltage & Overcurrent Protectors 1 | ||
| LTC4368 | RECOMMENDED FOR NEW DESIGNS | 100V UV/OV and Reverse Protection Controller with Bidirectional Circuit Breaker |
| Parts | Product Life Cycle | Description |
|---|---|---|
| LTC4040 | RECOMMENDED FOR NEW DESIGNS | 2.5A Battery Backup Power Manager |
Evaluation Kits
LTC4091 Demo Board | 36V Battery Charger and Power Backup Manager