Texas InstrumentsUnited States
The LM5051 Low Side OR-ing FET Controller operates in conjunction with an external MOSFET as an ideal diode rectifier when connected in series with a power source. This OR-ing controller allows MOSFETs to replace diode rectifiers in power distribution networks thus reducing both power loss and voltage drops. The LM5051 controller provides gate drive for an external N-Channel MOSFET and a fast response comparator to turn off the FET when current flows in the reverse direction. The LM5051 can connect power supplies ranging from -6V to -100V and can withstand transients up to -100V. The LM5051 also provides a FET test diagnostic mode which allows the system controller to test for shorted MOSFETs.
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View full reportTechnical parameters
| Power | |
|---|---|
| Number of channels | 1 |
| Shutdown current (ISD) (mA) (A) | 0.1 |
| Environment and package | |
| Operating temperature range (°C) | -40 to 125 |
| Other | |
| Design support | EVM, Simulation Model |
| Device type | ORing controller |
| Features | FET test, Linear control, Power good signal, Reverse current blocking |
| FET | External single FET |
| IGate pulsed (typ) (A) | 3.5 |
| IGate sink (typ) (mA) | 3.5 |
| IGate source (max) (µA) | 950 |
| IGate source (typ) (µA) | 660 |
| Imax (A) | 250 |
| Iq (max) (mA) | 0.78 |
| Iq (typ) (mA) | 0.69 |
| Product type | ORing controller |
| Rating | Catalog |
| Vin (max) (V) | 100 |
| Vin (min) (V) | -6 |
| VSense reverse (typ) (mV) | -45 |