LTC3873-5 (8)
The LTC3873-5 is available from Analog Devices at Xecor. Designed for boost, flyback, or SEPIC DC/DC converters, the LTC3873-5 offers constant frequency current mode operation, adjustable current limit, and ±1.5% voltage reference accuracy. Available in a low-profile 8-DFN package, it is ideal for telecom power supplies, automotive power supplies, and PoE applications. Whether used in high input and output voltage converter applications or logic-level MOSFET applications, this series ensures excellent line and load transient response and low quiescent current (300µA) for demanding applications. Xecor is an authorized distributor for Analog Devices. Please view our extensive selection of the LTC3873-5 series below.
| Part Number | Description | Package | Inventory | Add To Bom |
|---|---|---|---|---|
| LTC3873ITS8-5#TRPBF | With its single output flyback design and 240kHz switching frequency | SOT-8 | 2,514 | |
| LTC3873ETS8-5#TRMPBF | DC/DC Cntrlr Single-OUT Flyback 240kHz 8-Pin TSOT-23 T/R | SOT-8 | 3,906 | |
| LTC3873EDDB-5#TRPBF | DC/DC Cntrlr Single-OUT Flyback 240kHz 8-Pin DFN EP T/R | DFN-8 | 8,426 | |
| LTC3873EDDB-5#TRMPBF | Constant Frequency Current Mode Boost with No Sense Resistor | DFN-8 | 5,922 | |
| LTC3873ETS8-5#TRPBF | 8-pin LTC3873ETS8-5#TRPBF: Power-efficient 240kHz control for DC/DC conversion | SOT-23-8 | 2,381 | |
| LTC3873IDDB-5#TRMPBF | LTC3873IDDB-5#TRMPBF offers efficient control for single-output flyback DC/DC conversion at 240kHz in automotive environments | DFN-8 | 6,599 | |
| LTC3873ITS8-5#TRMPBF | Versatile current mode controller for various power configurations | SOT-23-8 | 5,945 | |
| LTC3873IDDB-5#TRPBF | 8-pin DFN EP package | DFN-8 | 2,189 |
Key Featrues
Wide Input Voltage Range (4V to 75V): This feature allows the LTC3873-5 to operate across a broad range of input voltages, making it highly versatile for various applications, including automotive and telecom power supplies. It ensures reliable performance even with fluctuating input voltages, enhancing system stability and adaptability.
Constant Frequency Current Mode Operation (200kHz): The fixed switching frequency simplifies the design of EMI filters and improves the transient response of the converter. This results in better efficiency and smoother operation, particularly in applications requiring precise voltage regulation and fast load changes.
No Current Sense Resistor Required: By eliminating the need for an external current sense resistor, the LTC3873-5 reduces component count and board space, lowering system costs and improving efficiency. This feature also simplifies the design process and enhances reliability in high-power applications.
Internal or Programmable External Soft-Start: The soft-start functionality prevents inrush current during startup, protecting the system components and ensuring a smooth power-up sequence. This feature is particularly beneficial in applications with large capacitive loads, reducing stress on the power supply and improving longevity.
Low Quiescent Current (300µA): The low quiescent current minimizes power loss during standby or light load conditions, improving overall system efficiency. This makes the LTC3873-5 ideal for battery-powered or energy-sensitive applications, extending battery life and reducing energy consumption.
Constant Frequency Current Mode Operation (200kHz): The fixed switching frequency simplifies the design of EMI filters and improves the transient response of the converter. This results in better efficiency and smoother operation, particularly in applications requiring precise voltage regulation and fast load changes.
No Current Sense Resistor Required: By eliminating the need for an external current sense resistor, the LTC3873-5 reduces component count and board space, lowering system costs and improving efficiency. This feature also simplifies the design process and enhances reliability in high-power applications.
Internal or Programmable External Soft-Start: The soft-start functionality prevents inrush current during startup, protecting the system components and ensuring a smooth power-up sequence. This feature is particularly beneficial in applications with large capacitive loads, reducing stress on the power supply and improving longevity.
Low Quiescent Current (300µA): The low quiescent current minimizes power loss during standby or light load conditions, improving overall system efficiency. This makes the LTC3873-5 ideal for battery-powered or energy-sensitive applications, extending battery life and reducing energy consumption.
Applications
Telecom Power Supplies: The LTC3873-5 is ideal for designing efficient and compact power supplies for telecom equipment. Its ability to handle high input and output voltages, along with its constant frequency current mode operation, ensures stable and reliable power delivery in demanding telecom environments.
Automotive Power Supplies: The LTC3873-5 is well-suited for automotive power supply applications, where it can manage high input voltages and provide precise voltage regulation. Its robust design and ability to operate in a wide temperature range make it ideal for use in automotive systems, ensuring reliable performance under harsh conditions.
PoE (Power over Ethernet) Applications: The LTC3873-5 is perfect for PoE applications, where it can efficiently manage power delivery over Ethernet cables. Its ability to handle high input voltages and provide stable output makes it suitable for powering network devices such as IP cameras, VoIP phones, and wireless access points.
Industrial Power Management: The LTC3873-5 is ideal for industrial power management systems, where it can be used to design efficient and reliable DC/DC converters. Its current mode operation and adjustable current limit ensure excellent line and load transient response, making it suitable for a wide range of industrial applications, including motor control and factory automation.
Automotive Power Supplies: The LTC3873-5 is well-suited for automotive power supply applications, where it can manage high input voltages and provide precise voltage regulation. Its robust design and ability to operate in a wide temperature range make it ideal for use in automotive systems, ensuring reliable performance under harsh conditions.
PoE (Power over Ethernet) Applications: The LTC3873-5 is perfect for PoE applications, where it can efficiently manage power delivery over Ethernet cables. Its ability to handle high input voltages and provide stable output makes it suitable for powering network devices such as IP cameras, VoIP phones, and wireless access points.
Industrial Power Management: The LTC3873-5 is ideal for industrial power management systems, where it can be used to design efficient and reliable DC/DC converters. Its current mode operation and adjustable current limit ensure excellent line and load transient response, making it suitable for a wide range of industrial applications, including motor control and factory automation.
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