LTC1871XMS#PBF
ActiveWIDE INPUT RANGE, NO RSENSE™CURRENT MODE BOOST, FLYBACK AND SEPIC CONTROLLER
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LTC1871XMS#PBF
ActiveWIDE INPUT RANGE, NO RSENSE™CURRENT MODE BOOST, FLYBACK AND SEPIC CONTROLLER
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Technical Specifications
Parameters and characteristics for this part
| Specification | LTC1871XMS#PBF |
|---|---|
| Clock Sync | True |
| Control Features | Frequency Control |
| Duty Cycle (Max) [Max] | 92 % |
| Frequency - Switching [Max] | 1 MHz |
| Frequency - Switching [Min] | 50 kHz |
| Function | Step-Up/Step-Down, Step-Up |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 175 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) |
| Supplier Device Package | 10-MSOP |
| Synchronous Rectifier | False |
| Topology | Boost, SEPIC, Flyback |
| Voltage - Supply (Vcc/Vdd) [Max] | 36 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 2.5 V |
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 | 37 | $ 189.81 | 1m+ |
Description
General part information
LTC1871X Series
LTC1871X is a wide input range, current mode, boost, flyback or SEPIC controller that drives an N-channel power MOSFET. LTC1871X is rated to 175°C junction temperature and is 100% tested at 175°C. Intended for low to medium power applications, it eliminates the need for a current sense resistor by utilizing the power MOSFET’s on-resistance, thereby maximizing efficiency.The IC’s operating frequency can be set with an external resistor over a 65kHz to 900kHz range, and can be synchronized to an external clock using the MODE/SYNC pin. Burst Mode operation at light loads, a low minimum operating supply voltage of 2.5V and a low shutdown quiescent current of 10μA make the LTC1871X ideally suited for battery-operated systems.For applications requiring constant frequency operation, Burst Mode operation can be defeated using the MODE/SYNC pin. Higher output voltage boost, SEPIC and flyback applications are possible with the LTC1871X by connecting the SENSE pin to a resistor in the source of the power MOSFET. The LTC1871X is available in the 10-lead MSOP package.VINRangeINTVCCFeaturesLTC18712.5V to 36V5.2VLTC1871-12.5V to 36V5.2VLower Burst Mode Threshold (0.195V vs. 0.3V)LTC1871-76V to 36V7VDrives 6V Gate N-Channel MOSFETsLTC1871X2.5V to 36V5.2V175°C Junction Temp, 100% Tested at 175°CApplicationsTelecom Power SuppliesPortable Electronic Equipment
Documents
Technical documentation and resources