LTC3873ITS8-5#TRMPBF
ActiveNO RSENSE™CONSTANT FREQUENCY CURRENT MODE BOOST/FLYBACK/SEPIC DC/DC CONTROLLER
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LTC3873ITS8-5#TRMPBF
ActiveNO RSENSE™CONSTANT FREQUENCY CURRENT MODE BOOST/FLYBACK/SEPIC DC/DC CONTROLLER
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Technical Specifications
Parameters and characteristics for this part
| Specification | LTC3873ITS8-5#TRMPBF |
|---|---|
| Clock Sync | False |
| Control Features | Soft Start, Enable, Current Limit |
| Duty Cycle (Max) [Max] | 78 % |
| Function | Step-Up/Step-Down, Step-Up |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 C |
| Output Configuration | Isolation Capable, Positive |
| Output Phases | 1 |
| Output Type | Transistor Driver |
| Package / Case | SOT-23-8 Thin, TSOT-23-8 |
| Supplier Device Package | TSOT-23-8 |
| Synchronous Rectifier | False |
| Topology | Boost, SEPIC, Flyback |
| Voltage - Supply (Vcc/Vdd) [Max] | 60 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 4.1 V |
| Part | Package / Case | Function | Output Configuration | Output Phases | Number of Outputs | Operating Temperature [Min] | Operating Temperature [Max] | Topology | Supplier Device Package | Mounting Type | Duty Cycle (Max) [Max] | Clock Sync | Output Type | Synchronous Rectifier | Control Features | Voltage - Supply (Vcc/Vdd) [Min] | Voltage - Supply (Vcc/Vdd) [Max] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Analog Devices Inc./Maxim Integrated | SOT-23-8 Thin TSOT-23-8 | Step-Up Step-Up/Step-Down | Isolation Capable Positive | 1 | 1 | -40 C | 125 °C | Boost Flyback SEPIC | TSOT-23-8 | Surface Mount | 78 % | Transistor Driver | Current Limit Enable Soft Start | 4.1 V | 60 V | ||
Analog Devices Inc./Maxim Integrated | SOT-23-8 Thin TSOT-23-8 | Step-Up Step-Up/Step-Down | Isolation Capable Positive | 1 | 1 | -40 ¯C | 85 C | Boost Flyback SEPIC | TSOT-23-8 | Surface Mount | 78 % | Transistor Driver | Current Limit Enable Soft Start | 4.1 V | 60 V | ||
 Analog Devices Inc./Maxim Integrated | 8-WFDFN Exposed Pad | Step-Up Step-Up/Step-Down | Isolation Capable Positive | 1 | 1 | -40 C | 125 °C | Boost Flyback SEPIC | 8-DFN (3x2) | Surface Mount | 78 % | Transistor Driver | Current Limit Enable Soft Start | 4.1 V | 60 V | ||
 Analog Devices Inc./Maxim Integrated | 8-WFDFN Exposed Pad | Step-Up Step-Up/Step-Down | Isolation Capable Positive | 1 | 1 | -40 ¯C | 85 C | Boost Flyback SEPIC | 8-DFN (3x2) | Surface Mount | 78 % | Transistor Driver | Current Limit Enable Soft Start | 4.1 V | 60 V | ||
 Analog Devices Inc./Maxim Integrated | SOT-23-8 Thin TSOT-23-8 | Step-Up Step-Up/Step-Down | Isolation Capable Positive | 1 | 1 | -40 ¯C | 85 C | Boost Flyback SEPIC | TSOT-23-8 | Surface Mount | 78 % | Transistor Driver | Current Limit Enable Soft Start | 4.1 V | 60 V | ||
Analog Devices Inc./Maxim Integrated | 8-WFDFN Exposed Pad | Step-Up Step-Up/Step-Down | Isolation Capable Positive | 1 | 1 | -40 C | 125 °C | Boost Flyback SEPIC | 8-DFN (3x2) | Surface Mount | 78 % | Transistor Driver | Current Limit Enable Soft Start | 4.1 V | 60 V | ||
Analog Devices Inc./Maxim Integrated | SOT-23-8 Thin TSOT-23-8 | Step-Up Step-Up/Step-Down | Isolation Capable Positive | 1 | 1 | -40 C | 125 °C | Boost Flyback SEPIC | TSOT-23-8 | Surface Mount | 78 % | Transistor Driver | Current Limit Enable Soft Start | 4.1 V | 60 V | ||
 Analog Devices Inc./Maxim Integrated | 8-WFDFN Exposed Pad | Step-Up Step-Up/Step-Down | Isolation Capable Positive | 1 | 1 | -40 ¯C | 85 C | Boost Flyback SEPIC | 8-DFN (3x2) | Surface Mount | 78 % | Transistor Driver | Current Limit Enable Soft Start | 4.1 V | 60 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 | 0 | $ 2.05 | 1m+ |
| Tape & Reel (TR) | 500 | $ 2.28 | 1m+ | |
| 1000 | $ 2.15 | |||
| 1500 | $ 2.09 | |||
| 2500 | $ 2.01 | |||
| 3500 | $ 1.97 | |||
| 5000 | $ 1.96 | |||
Description
General part information
LTC3873-5 Series
The LTC3873-5 is a constant frequency current mode controller for boost, flyback or SEPIC DC/DC converters designed to drive an N-channel MOSFET for high input and output voltage converter applications.The LTC3873-5 provides ±1.5% output voltage accuracy and consumes only 300μA quiescent current during normal operation and only 50μA during micropower start-up. Using a 9.3V internal shunt regulator, the LTC3873-5 can be powered from a high input voltage through a resistor or it can be powered directly from a low impedance DC voltage of 9V or less. Soft-start can be programmed using an external capacitor.The LTC3873-5 is available in 8-lead ThinSOT and 2mm × 3mm DFN packages.LTC3873LTC3873-5VCCUV+8.4V3.9VVCCUV–4V2.9VApplicationsTelecom Power SuppliesAutomotive Power SuppliesPoE Applications
Documents
Technical documentation and resources