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LTC3891EUDC#TRPBF
+NomenclatureIC REG CTRLR BUCK 20QFN
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FabricantAnalog Equipment GmbH.
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Pièce fabricant #LTC3891EUDC#TRPBF
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Fiche technique LTC3891EUDC#TRPBF DataSheet
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Spécifications
| Attribut | Valeur |
| Part Status | Active |
| Output Type | Transistor Driver |
| Function | Step-Down |
| Output Configuration | Positive |
| Topology | Buck |
| Number of Outputs | 1 |
| Output Phases | 1 |
| Voltage - Supply (Vcc/Vdd) | 4V ~ 60V |
| Frequency - Switching | 105kHz ~ 835kHz, 350kHz ~ 535kHz |
| Duty Cycle (Max) | 99% |
| Synchronous Rectifier | Yes |
| Clock Sync | No |
| Control Features | Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
| Package / Case | 20-WFQFN Exposed Pad |
| Supplier Device Package | 20-QFN (3x4) |
| Base Product Number | LTC3891 |
Présentation
Description
Key features include a current mode control architecture, which enhances stability and simplifies compensation, along with integrated MOSFETs to reduce component count. The device supports a programmable switching frequency, allowing for optimization based on design requirements. Additionally, it incorporates protection features such as over-voltage protection (OVP), under-voltage lockout (UVLO), and thermal shutdown.
This IC is particularly beneficial in applications where efficiency and reliability are critical, such as in power supplies for servers, telecommunications, and battery-powered systems. Overall, the LTC3891EUDC#TRPBF is an ideal choice for engineers looking for a robust solution in high-efficiency DC/DC conversion.
Equivalent
Features
1. Wide Input Voltage Range: Operates from 4.5V to 60V, accommodating various power source types.
2. High Efficiency: Achieves efficiencies over 95%, reducing heat generation and improving thermal performance.
3. Multi-Phase Operation: Supports up to four phases in parallel, enhancing output current capability and minimizing ripple.
4. Programmable Switching Frequency: Offers a range of frequencies from 200kHz to 1MHz, allowing for design optimization based on application needs.
5. Current Mode Control: Provides excellent transient response and ease of compensation.
6. Integrated MOSFET Drivers: Reduces component count, simplifying design.
7. Soft-Start and Tracking Features: Ensures smooth power up and allows output voltage to track input voltage or other references.
8. Overvoltage and Overcurrent Protection: Enhances system reliability and safety.
These features make the LTC3891 suitable for applications requiring robust power management solutions, such as industrial, automotive, and telecommunication systems.
Pinout
Key functions include:
- Voltage Regulation: It regulates output voltage with high efficiency.
- Current Control: Supports peak current mode control for improved transient response.
- Frequency Synchronization: Allows synchronization of switching frequency with external clock signals.
- Soft-Start: Controls the output voltage ramp-up to prevent inrush current.
- Power Good Indicator: Signals when the output voltage is within the specified range.
- Overvoltage and Undervoltage Protection: Protects the output from excessive voltage conditions.
- Thermal Shutdown: Automatically disables the device in case of over-temperature.
This robust device is well-suited for applications requiring precise voltage regulation and high efficiency.
Manufacturer
The LTC3891 is a voltage mode step-down controller designed for high-performance power management applications, typically used in systems requiring efficient power conversion. Analog Devices is known for its innovation in signal processing and power management solutions, providing essential components and technologies that enable advanced electronic designs.
Application
1. Telecommunications - Powering networking equipment and base stations.
2. Data Centers - Efficient power management for servers and storage systems.
3. Industrial Automation - Power supplies for control systems and robotics.
4. Automotive - Powering infotainment and advanced driver-assistance systems (ADAS).
5. Consumer Electronics - Efficient charging and power solutions for portable devices.
6. LED Drivers - Powering high-brightness LED applications.
Its versatility and high efficiency make it suitable for various voltage regulation needs.