LTC3891 (14)
The LTC3891 is available from Analog Devices at Xecor. Designed for high-performance step-down DC/DC conversion, the LTC3891 offers wide input voltage range (4V to 60V), low operating current (50µA), and flexible output voltage control (0.8V to 24V). Available in 20-pin TSSOP and QFN packages, it is ideal for automotive always-on systems, battery-powered digital devices, and distributed DC power systems. Whether used in automotive applications, portable electronics, or industrial power systems, this series ensures efficiency, reliability, and scalability for demanding applications. Xecor is an authorized distributor for Analog Devices. Please view our extensive selection of the LTC3891 series below.
| Part Number | Description | Package | Inventory | Add To Bom |
|---|---|---|---|---|
| LTC3891EUDC#PBF | The LTC3891EUDC#PBF features a compact 3x4 QFN package for easy integration into electronic devices | QFN-20 | 7,833 | |
| LTC3891EFE#PBF | DC/DC Cntrlr Single-OUT Step Down 900kHz 20-Pin TSSOP EP Tube | TSSOP-20 | 7,657 | |
| LTC3891MPUDC#TRPBF | LTC3891MPUDC#TRPBF is a single-output step-down DC/DC controller with a switching frequency of 900kHz | QFN-20 | 6,099 | |
| LTC3891IUDC#PBF | This QFN--EP package offers excellent thermal management and reliability features for demanding environment | QFN-20 | 7,584 | |
| LTC3891HUDC#TRPBF | Single output voltage regulation for automotive power systems | QFN-20 | 6,479 | |
| LTC3891EFE#TRPBF | DC/DC Cntrlr Single-OUT Step Down 900kHz 20-Pin TSSOP EP T/R | TSSOP-20 | 5,848 | |
| LTC3891HFE#PBF | DC/DC Cntrlr Single-OUT Step Down 900kHz 20-Pin TSSOP EP Tube | TSSOP-20 | 7,594 | |
| LTC3891EUDC#TRPBF | DC/DC Cntrlr Single-OUT Step Down 900kHz 20-Pin QFN EP T/R | QFN-20 | 8,148 | |
| LTC3891HFE#TRPBF | DC/DC Cntrlr Single-OUT Step Down 900kHz 20-Pin TSSOP EP T/R | TSSOP-20 | 9,538 | |
| LTC3891HUDC#PBF | LTC3891HUDC#PBF: Step-down converter for controlling DC voltage | QFN-20 | 7,007 | |
| LTC3891IUDC#TRPBF | DC/DC Cntrlr Single-OUT Step Down 900kHz 20-Pin QFN EP T/R | QFN-20 | 5,116 | |
| LTC3891IFE#PBF | DC/DC Cntrlr Single-OUT Step Down 900kHz 20-Pin TSSOP EP Tube | TSSOP-20 | 9,579 | |
| LTC3891MPUDC#PBF | DC/DC Cntrlr Single-OUT Step Down 900kHz 20-Pin QFN EP Tube | QFN-20 | 7,071 | |
| LTC3891MPFE#PBF | Switching Voltage Regulators Low IQ, 60V Synchronous Step-Down Controller | TSSOP-20 | 2,739 |
Key Featrues
Wide Input Voltage Range (4V to 60V): The LTC3891 supports a broad input voltage range, making it versatile for various applications, including automotive and battery-powered systems. This feature ensures reliable operation even with fluctuating input voltages, enhancing system stability and efficiency.
Low Operating Quiescent Current (50µA): With a low quiescent current, the LTC3891 minimizes power consumption during standby or light-load conditions. This feature is particularly beneficial for energy-sensitive applications, extending battery life and improving overall power efficiency.
Programmable Fixed Frequency (50kHz to 900kHz): The ability to program the switching frequency allows designers to optimize the regulator for specific performance and efficiency requirements. This flexibility helps in reducing electromagnetic interference (EMI) and improving thermal management in compact designs.
Selectable Current Limit: The LTC3891 offers a selectable current limit feature, providing enhanced protection against overcurrent conditions. This ensures safe operation and protects the device and connected components from potential damage, increasing system reliability.
Very Low Dropout Operation (99% Duty Cycle): The regulator can operate with a very low dropout voltage, enabling efficient power conversion even when the input voltage is close to the output voltage. This feature is crucial for applications requiring high efficiency and minimal power loss, such as in portable devices and distributed power systems.
Low Operating Quiescent Current (50µA): With a low quiescent current, the LTC3891 minimizes power consumption during standby or light-load conditions. This feature is particularly beneficial for energy-sensitive applications, extending battery life and improving overall power efficiency.
Programmable Fixed Frequency (50kHz to 900kHz): The ability to program the switching frequency allows designers to optimize the regulator for specific performance and efficiency requirements. This flexibility helps in reducing electromagnetic interference (EMI) and improving thermal management in compact designs.
Selectable Current Limit: The LTC3891 offers a selectable current limit feature, providing enhanced protection against overcurrent conditions. This ensures safe operation and protects the device and connected components from potential damage, increasing system reliability.
Very Low Dropout Operation (99% Duty Cycle): The regulator can operate with a very low dropout voltage, enabling efficient power conversion even when the input voltage is close to the output voltage. This feature is crucial for applications requiring high efficiency and minimal power loss, such as in portable devices and distributed power systems.
Applications
Automotive Power Management: The LTC3891 is ideal for managing power in automotive always-on systems, such as infotainment, telematics, and advanced driver-assistance systems (ADAS). Its wide input voltage range (4V to 60V) and low quiescent current (50µA) ensure efficient operation in demanding automotive environments, making it suitable for battery-powered and distributed power systems in vehicles.
Industrial Distributed Power Systems: The LTC3891 is well-suited for distributed power systems in industrial applications, where reliable and efficient DC/DC conversion is critical. Its ability to operate over a wide input voltage range and deliver up to 5A of output current makes it ideal for powering sensors, actuators, and control modules in factory automation and process control systems.
Portable Battery-Powered Devices: The LTC3891 is perfect for portable battery-powered devices, such as handheld instruments, medical devices, and consumer electronics. Its low quiescent current, adjustable output voltage (0.8V to 24V), and selectable light-load operation modes (continuous, pulse-skipping, or burst mode) ensure extended battery life and efficient power management in compact designs.
High-Performance Computing Systems: The LTC3891 is an excellent choice for high-performance computing systems, such as servers, networking equipment, and data storage devices. Its synchronous step-down architecture, programmable switching frequency (50kHz to 900kHz), and advanced control features (soft-start, power good, and tracking) enable precise and efficient power delivery to processors, memory, and other critical components.
These applications highlight the versatility and performance of the LTC3891 in a variety of demanding environments.
Industrial Distributed Power Systems: The LTC3891 is well-suited for distributed power systems in industrial applications, where reliable and efficient DC/DC conversion is critical. Its ability to operate over a wide input voltage range and deliver up to 5A of output current makes it ideal for powering sensors, actuators, and control modules in factory automation and process control systems.
Portable Battery-Powered Devices: The LTC3891 is perfect for portable battery-powered devices, such as handheld instruments, medical devices, and consumer electronics. Its low quiescent current, adjustable output voltage (0.8V to 24V), and selectable light-load operation modes (continuous, pulse-skipping, or burst mode) ensure extended battery life and efficient power management in compact designs.
High-Performance Computing Systems: The LTC3891 is an excellent choice for high-performance computing systems, such as servers, networking equipment, and data storage devices. Its synchronous step-down architecture, programmable switching frequency (50kHz to 900kHz), and advanced control features (soft-start, power good, and tracking) enable precise and efficient power delivery to processors, memory, and other critical components.
These applications highlight the versatility and performance of the LTC3891 in a variety of demanding environments.
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