The LTC4350 is a load share controller that allows systems to equally load multiple power supplies connected in parallel. The output voltage of each supply is adjusted using the SENSE+ input until all currents match the share bus. The LTC4350 also isolates supply failures by turning off the series pass transistors and identifying the failed supply. The failed supply can then be removed and replaced with a new unit without turning off the system power. The LTC4350 is available in a 16-pin narrow SSOP package.
The LTC4350 is a load‑share controller that enables parallel operation of multiple power supplies. It isolates supply failures, provides hot‑swap capability, and adjusts output voltages via a share‑bus mechanism. The device is supplied in a 16‑lead narrow SSOP package and is intended for servers, telecom equipment, and other redundant power systems.
The document includes absolute maximum ratings, detailed DC electrical characteristics, pin‑function descriptions, typical performance curves, package dimensions, and recommended layout guidelines. Application notes illustrate how the controller works with remote‑sense power supplies and how to implement current sharing and fault isolation.
| Package Type | 16‑Lead Plastic SSOP (Narrow .150 in) |
|---|---|
| Supply Current (DC, typical) | 1.6 mA |
The UV pin provides an undervoltage lockout; its threshold is set at 1.244 V with a 24 mV hysteresis.
The LTC4350 is supplied in a 16‑lead narrow SSOP package.
Typical supply current is about 1.6 mA under normal conditions.