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| Part Number | LTC3855IFE#PBF | LTC3856IFE#PBF | LTC3859IFE#PBF | LTC3855EFE#PBF |
|---|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. |
| Product Status | Active | Active | Active | Active |
| Output Type | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver |
| Function | Step-Down | Step-Down | Step-Down, Step-Up/Step-Down | Step-Down |
| Output Configuration | Positive | Positive | Positive | Positive |
| Topology | Buck | Buck | Buck, Buck-Boost, SEPIC | Buck |
| Number of Outputs | 2 | 2 | 3 | 2 |
| Output Phases | 2 | 2 | 2 | 2 |
| Voltage - Supply (Vcc/Vdd) | 4.5V ~ 38V | 4.5V ~ 38V | 4.5V ~ 38V | 4.5V ~ 38V |
| Frequency - Switching | 250kHz ~ 770kHz | 250kHz ~ 770kHz | 115kHz ~ 835kHz, 350kHz ~ 535kHz | 250kHz ~ 770kHz |
| Duty Cycle (Max) | 95% | 94% | 99%, 100% | 95% |
| Synchronous Rectifier | Yes | Yes | Yes | Yes |
| Clock Sync | No | No | No | No |
| Serial Interfaces | - | - | - | - |
| Control Features | Current Limit, Enable, Frequency Control, Phase Control, Power Good, Soft Start, Tracking | Current Limit, Enable, Frequency Control, Phase Control, Power Good, Soft Start, Tracking | Enable, Frequency Control, Power Good, Soft Start, Tracking | Current Limit, Enable, Frequency Control, Phase Control, Power Good, Soft Start, Tracking |
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 38-TFSOP (0.173", 4.40mm Width) Exposed Pad | 38-TFSOP (0.173", 4.40mm Width) Exposed Pad | 38-TFSOP (0.173", 4.40mm Width) Exposed Pad | 38-TFSOP (0.173", 4.40mm Width) Exposed Pad |
| Supplier Device Package | 38-TSSOP-EP | 38-TSSOP-EP | 38-TSSOP-EP | 38-TSSOP-EP |
