LT8491

RECOMMENDED FOR NEW DESIGNS

High Voltage Buck-Boost Battery Charge Controller with Maximum Power Point Tracking (MPPT) and I2C

Analog Devices LT8491 Product Info

10 February 2026 5

Features

V_IN Range: 6V to 80V
V_BAT Range: 1.3V to 80V
Single Inductor Allows V_IN Above, Below, or Equal to V_BAT
Automatic MPPT for Solar Powered Charging
Automatic Temperature Compensation
I²C Telemetry and Configuration

Internal EEPROM for Configuration Storage
Operation from Solar Panel or DC Supply
Four Integrated Feedback Loops
Synchronizable Fixed Frequency: 100kHz to 400kHz
64-Lead (7mm × 11mm × 0.75mm) QFN Package

Part details & applications

The LT8491 is a buck-boost switching regulator battery charger that implements a constant-current constant-voltage (CCCV) charging profile used for most battery types, including sealed lead-acid (SLA), flooded, gel and lithium-ion.

The device operates from input voltages above, below or equal to the output voltage and can be powered by a solar panel or a DC power supply. On-chip logic provides automatic maximum power point tracking (MPPT) for solar powered applications. The LT8491 can perform automatic temperature compensation by sensing an external thermistor thermally coupled to the battery. The STATUS pin can be used to drive an LED indicator lamp. The device is available in a low profile (0.75mm) 7mm × 11mm 64-lead QFN package.

Applications

Solar Powered Battery Chargers
Multiple Types of Lead-Acid Battery Charging
Li-Ion Battery Charger
Battery Equipped Industrial or Portable Military Equipment

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