LTC3871ELXE#PBF
ActiveBIDIRECTIONAL POLYPHASE SYNCHRONOUS BUCK OR BOOST CONTROLLER
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LTC3871ELXE#PBF
ActiveBIDIRECTIONAL POLYPHASE SYNCHRONOUS BUCK OR BOOST CONTROLLER
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Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3871ELXE#PBF |
|---|---|
| Clock Sync | True |
| Control Features | Frequency Control, Phase Control, Enable, Current Limit, Soft Start |
| Duty Cycle (Max) [Max] | 98 % |
| Frequency - Switching [Max] | 460 kHz |
| Frequency - Switching [Min] | 60 kHz |
| Function | Step-Down, Step-Up |
| Mounting Type | Surface Mount |
| Number of Outputs | 2 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | Programmable |
| Output Type | Transistor Driver |
| Package / Case | 48-LQFP Exposed Pad |
| Supplier Device Package | 48-eLQFP (7x7) |
| Synchronous Rectifier | True |
| Topology | Boost, Buck |
| Voltage - Supply (Vcc/Vdd) [Max] | 100 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 1.2 V |
LTC3871 Series
Bidirectional PolyPhase Synchronous Buck or Boost Controller
| Part | Topology | Operating Temperature [Max] | Operating Temperature [Min] | Output Type | Supplier Device Package | Output Configuration | Control Features | Duty Cycle (Max) [Max] | Synchronous Rectifier | Package / Case | Clock Sync | Output Phases | Function | Frequency - Switching [Max] | Frequency - Switching [Min] | Mounting Type | Voltage - Supply (Vcc/Vdd) [Min] | Voltage - Supply (Vcc/Vdd) [Max] | Number of Outputs | Output Phases | Contents | Main Purpose | Regulator Topology | Voltage - Input [Max] | Voltage - Input [Min] | Outputs and Type | Voltage - Output | Current - Output | Frequency - Switching | Supplied Contents | Board Type | Outputs and Type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Analog Devices Inc./Maxim Integrated | Boost Buck | 125 °C | -40 °C | Transistor Driver | 48-eLQFP (7x7) | Positive | Current Limit Enable Frequency Control Phase Control Soft Start | 98 % | 48-LQFP Exposed Pad | 12 | Step-Down Step-Up | 460 kHz | 60 kHz | Surface Mount | 1.2 V | 100 V | 2 | |||||||||||||||
Analog Devices Inc./Maxim Integrated | Boost Buck | 150 °C | -40 °C | Transistor Driver | 48-eLQFP (7x7) | Positive | Current Limit Enable Frequency Control Phase Control Soft Start | 98 % | 48-LQFP Exposed Pad | 12 | Step-Down Step-Up | 460 kHz | 60 kHz | Surface Mount | 1.2 V | 100 V | 2 | |||||||||||||||
Analog Devices Inc./Maxim Integrated | Boost Buck | 125 °C | -40 °C | Transistor Driver | 48-eLQFP (7x7) | Positive | Current Limit Enable Frequency Control Phase Control Soft Start | 98 % | 48-LQFP Exposed Pad | 12 | Step-Down Step-Up | 460 kHz | 60 kHz | Surface Mount | 1.2 V | 100 V | 2 | |||||||||||||||
Analog Devices Inc./Maxim Integrated | Boost Buck | 125 °C | -40 °C | Transistor Driver | 48-eLQFP (7x7) | Positive | Current Limit Enable Frequency Control Phase Control Soft Start | 98 % | 48-LQFP Exposed Pad | Step-Down Step-Up | 460 kHz | 60 kHz | Surface Mount | 1.2 V | 100 V | 2 | Programmable | |||||||||||||||
Analog Devices Inc./Maxim Integrated | Boost Buck | 150 °C | -40 °C | Transistor Driver | 48-eLQFP (7x7) | Positive | Current Limit Enable Frequency Control Phase Control Soft Start | 98 % | 48-LQFP Exposed Pad | Step-Down Step-Up | 460 kHz | 60 kHz | Surface Mount | 1.2 V | 100 V | 2 | Programmable | |||||||||||||||
Analog Devices Inc./Maxim Integrated | Boost Buck | 125 °C | -40 °C | Transistor Driver | 48-eLQFP (7x7) | Positive | Current Limit Enable Frequency Control Phase Control Soft Start | 98 % | 48-LQFP Exposed Pad | Step-Down Step-Up | 460 kHz | 60 kHz | Surface Mount | 1.2 V | 100 V | 2 | Programmable | |||||||||||||||
Analog Devices Inc./Maxim Integrated | Boost Buck | 125 °C | -40 °C | Transistor Driver | 48-eLQFP (7x7) | Positive | Current Limit Enable Frequency Control Phase Control Soft Start | 98 % | 48-LQFP Exposed Pad | Step-Down Step-Up | 460 kHz | 60 kHz | Surface Mount | 1.2 V | 100 V | 2 | Programmable | |||||||||||||||
 Analog Devices Inc./Maxim Integrated | Board(s) | DC/DC Bidirectional | Boost Buck | 13 V 75 V | 10 V 30 V | 1 Non-Isolated Output | 12V 48V | 15 A 60 A | 110 kHz | |||||||||||||||||||||||
 Analog Devices Inc./Maxim Integrated | Board(s) | DC/DC Bidirectional | Boost Buck | 13 V 75 V | 10 V 30 V | 1 Non-Isolated Output Non-Isolated | 12V 48V | 7.5 A 30 A | 110 kHz | Board(s) | Fully Populated | 1 | ||||||||||||||||||||
Analog Devices Inc./Maxim Integrated | Boost Buck | 125 °C | -40 °C | Transistor Driver | 48-eLQFP (7x7) | Positive | Current Limit Enable Frequency Control Phase Control Soft Start | 98 % | 48-LQFP Exposed Pad | Step-Down Step-Up | 460 kHz | 60 kHz | Surface Mount | 1.2 V | 100 V | 2 | Programmable |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | Updated |
|---|---|---|---|---|
| Digikey | N/A | 0 | $ 15.13 | 1m+ |
| Tray | 1 | $ 16.10 | 1m+ | |
| 10 | $ 11.54 | |||
| 25 | $ 10.37 | |||
| 80 | $ 9.24 | |||
| 230 | $ 8.47 | |||
| 440 | $ 8.10 | |||
| 945 | $ 7.95 | |||
Description
General part information
LTC3871 Series
The LTC3871/LTC3871-1 is a high performance bidirectional buck or boost switching regulator controller that operates in either buck or boost mode on demand. It regulates in buck mode from VHIGH-to-VLOWand boost mode from VLOW-to-VHIGHdepending on a control signal, making it ideal for 48V/12V automotive dual battery systems. An accurate current programming loop regulates the maximum current that can be delivered in either direction. The LTC3871/LTC3871-1 allows both batteries to supply energy to the load simultaneously by converting energy from one battery to the other.Its proprietary constant-frequency current mode architecture enhances the signal-to-noise ratio enabling low noise operation and provides excellent current matching between phases. Additional features include discontinuous or continuous mode of operation, OV/UV monitors, independent loop compensation for buck and boost operation, accurate output current monitoring and overcurrent protection. The LTC3871 and LTC3871-1 have different current limit foldback characteristics.ApplicationsAutomotive 48V/12V Dual Battery SystemsBackup Power Systems