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| Part Number | LTC3891HFE#PBF | LTC3897HFE#PBF | LTC3891IFE#PBF | LTC3895HFE#PBF | LTC3894HFE#PBF | LTC3896HFE#PBF | LTC3899HFE#PBF | LTC3891EFE#PBF |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. |
| Product Status | Active | Active | Active | Active | Active | Active | Active | Active |
| Output Type | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver |
| Function | Step-Down | Step-Up | Step-Down | Step-Down | Step-Down | Step-Up/Step-Down | Step-Down | Step-Down |
| Output Configuration | Positive | Positive | Positive | Positive | Positive | Negative | Positive | Positive |
| Topology | Buck | Boost | Buck | Buck | Buck | Buck-Boost | Buck, Buck-Boost | Buck |
| Number of Outputs | 1 | 2 | 1 | 1 | 1 | 1 | 3 | 1 |
| Output Phases | 1 | 2 | 1 | 1 | 1 | 1 | 2 | 1 |
| Voltage - Supply (Vcc/Vdd) | 4V ~ 60V | 4.5V ~ 65V | 4V ~ 60V | 4V ~ 140V | 4.5V ~ 150V | 4V ~ 140V | 4.5V ~ 60V | 4V ~ 60V |
| Frequency - Switching | 105kHz ~ 835kHz, 350kHz ~ 535kHz | 75kHz ~ 850kHz | 105kHz ~ 835kHz, 350kHz ~ 535kHz | 50kHz ~ 900kHz | 50kHz ~ 850kHz | 50kHz ~ 900kHz | 105kHz ~ 835kHz, 350kHz ~ 535kHz | 105kHz ~ 835kHz, 350kHz ~ 535kHz |
| Duty Cycle (Max) | 99% | - | 99% | 100% | 100% | 99% | 100% | 99% |
| Synchronous Rectifier | Yes | Yes | Yes | Yes | Yes | No | Yes | Yes |
| Clock Sync | No | Yes | No | No | Yes | No | No | No |
| Serial Interfaces | - | - | - | - | - | - | - | - |
| Control Features | Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking | Current Limit, Frequency Control, Overcurrent, Ramping | Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking | Current Limit, Enable, Frequency Control, Phase Control, Power Good, Soft Start | Current Limit, Enable, Frequency Control, Power Good, Soft Start | Current Limit, Enable, Frequency Control, Phase Control, Power Good, Soft Start | Enable, Frequency Control, Soft Start, Tracking | Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking |
| Operating Temperature | -40°C ~ 150°C (TJ) | -40°C ~ 150°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 150°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 150°C (TJ) | -40°C ~ 150°C (TJ) | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 20-TSSOP (0.173", 4.40mm Width) Exposed Pad | 38-TFSOP (0.173", 4.40mm Width) Exposed Pad | 20-TSSOP (0.173", 4.40mm Width) Exposed Pad | 38-TFSOP (0.173", 4.40mm Width) 31 Leads, Exposed Pad | 20-TSSOP (0.173", 4.40mm Width), 16 Leads, Exposed Pad | 38-TFSOP (0.173", 4.40mm Width) 31 Leads, Exposed Pad | 38-TFSOP (0.173", 4.40mm Width) Exposed Pad | 20-TSSOP (0.173", 4.40mm Width) Exposed Pad |
| Supplier Device Package | 20-TSSOP-EP | 38-TSSOP-EP | 20-TSSOP-EP | 38-TSSOP-EP | 20-TSSOP-EP | 38-TSSOP-EP | 38-TSSOP-EP | 20-TSSOP-EP |
