LTC4370IMS Two-Supply Diode-OR & Current Balancing Controller (18V, MSOP-16)

Build bulletproof, fault-tolerant power systems for your heavy-lift drones and critical robotics with the LTC4370IMS current balancing controller. When designing professional equipment, a single point of failure in the power supply is unacceptable. This advanced IC allows you to safely connect two independent power sources (like dual batteries or dual BECs) to a single load. By controlling external N-channel MOSFETs, it acts as an "ideal diode," virtually eliminating the voltage drops and massive heat dissipation associated with traditional Schottky diodes.

What makes the LTC4370 truly remarkable is its active current-sharing capability. Instead of simply draining one battery and then switching to the other, it actively balances the load so that both batteries discharge equally. Operating flawlessly up to 18V, it is perfectly suited for 3S and 4S LiPo setups or 12V power distribution networks. Housed in an MSOP-16 package, it is the ultimate solution for designing professional Power Distribution Boards (PDBs) where redundancy, zero-downtime, and thermal efficiency are mandatory.

Key Features:

• Active Load Sharing: Automatically balances the current draw between two separate power supplies, ensuring dual batteries discharge evenly.

• Ideal Diode-ORing: Uses N-channel MOSFETs to replace lossy Schottky diodes, drastically reducing heat generation and preserving precious battery voltage.

• Seamless Redundancy: If one battery or power supply fails or drops in voltage, the IC instantly isolates the fault, allowing the other supply to take over without interrupting the system.

• 18V Maximum Rating: Perfectly matches 4S LiPo battery architectures (16.8V fully charged) and standard 12V/15V industrial rails.

Specifications:

• Part Number: LTC4370IMS#PBF

• IC Type: Two-Supply Diode-OR Current Balancing Controller

• Operating Voltage: 2.9V to 18V

• MOSFET Support: N-Channel

• Package Type: MSOP-16 (SMD/SMT)