LTC3875EUH#PBF
Product Overview
Category
LTC3875EUH#PBF belongs to the category of voltage mode synchronous buck controllers.
Use
This product is primarily used in power management applications, specifically for controlling and regulating the output voltage in DC-DC converter circuits.
Characteristics
- Voltage mode control: The LTC3875EUH#PBF utilizes voltage mode control to regulate the output voltage.
- Synchronous operation: It operates in synchronous mode, allowing for higher efficiency and reduced power losses.
- Wide input voltage range: The controller can handle a wide input voltage range, making it suitable for various applications.
- Adjustable frequency: The switching frequency can be adjusted to optimize performance based on specific requirements.
- Fault protection: The LTC3875EUH#PBF incorporates various fault protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.
Package
The LTC3875EUH#PBF comes in a 32-pin QFN package, which provides good thermal dissipation and compact size.
Essence
The essence of LTC3875EUH#PBF lies in its ability to efficiently regulate the output voltage in DC-DC converter circuits, ensuring stable and reliable power delivery.
Packaging/Quantity
The product is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.
Specifications
- Input Voltage Range: 4.5V to 38V
- Output Voltage Range: 0.6V to VIN
- Switching Frequency Range: 100kHz to 1MHz
- Maximum Duty Cycle: 90%
- Operating Temperature Range: -40°C to 125°C
- Control Method: Voltage Mode Control
- Package Type: 32-pin QFN
Detailed Pin Configuration
The LTC3875EUH#PBF has a total of 32 pins, each serving a specific function. The pin configuration is as follows:
- VIN: Input voltage pin
- GND: Ground reference pin
- FB: Feedback pin for output voltage regulation
- COMP: Compensation pin for loop stability
- SS: Soft-start pin for controlled startup
- SYNC: Synchronization pin for external clock synchronization
- VCC: Supply voltage pin for internal circuitry
- PGND: Power ground pin
- BOOT: Bootstrap capacitor connection pin
- SW: Switching node pin 11-32: Other pins with various functions
Functional Features
1. Voltage Mode Control
The LTC3875EUH#PBF utilizes voltage mode control to regulate the output voltage accurately. This control method ensures stable and precise voltage regulation.
2. Synchronous Operation
By operating in synchronous mode, the controller reduces power losses and improves overall efficiency. The synchronous operation allows for better utilization of energy, resulting in increased system performance.
3. Wide Input Voltage Range
With a wide input voltage range of 4.5V to 38V, the LTC3875EUH#PBF can handle a variety of input sources, making it suitable for diverse applications.
4. Adjustable Frequency
The switching frequency of the controller can be adjusted within a range of 100kHz to 1MHz. This flexibility enables optimization of the converter's performance based on specific requirements.
5. Fault Protection
The LTC3875EUH#PBF incorporates several fault protection features, including overvoltage protection, undervoltage lockout, and thermal shutdown. These protections ensure safe operation and prevent damage to the device and connected components.
Advantages and Disadvantages
Advantages
- Accurate voltage regulation through voltage mode control
- Improved efficiency due to synchronous operation
- Wide input voltage range for versatile applications
- Adjustable switching frequency for performance optimization
- Comprehensive fault protection features for enhanced reliability
Disadvantages
- Limited pin count may restrict the number of external components that can be connected directly to the controller.
Working Principles
The LTC3875EUH#PBF operates based on the principle of voltage mode control. It compares the feedback voltage (FB) with a reference voltage and adjusts the duty cycle of the internal power switches accordingly. By modulating the duty cycle, the controller regulates the output voltage to the desired level.
During operation, the controller continuously monitors the feedback voltage and adjusts the duty cycle in real-time to maintain a stable output voltage. The synchronous operation ensures efficient power transfer by minimizing power losses during switching transitions.
Detailed Application Field Plans
The LTC3875EUH#PBF finds application in various fields, including but not limited to: - Industrial power supplies - Telecom infrastructure - Automotive electronics - Distributed power systems - Battery-powered devices
In industrial power supplies, the controller can regulate the output voltage in DC-DC converters used for powering industrial equipment
Lista 10 Vanliga frågor och svar relaterade till tillämpningen av LTC3875EUH#PBF i tekniska lösningar
Sure! Here are 10 common questions and answers related to the application of LTC3875EUH#PBF in technical solutions:
Q: What is LTC3875EUH#PBF? A: LTC3875EUH#PBF is a high-performance synchronous buck controller IC manufactured by Linear Technology (now part of Analog Devices). It is used for regulating voltage in power supply applications.
Q: What is the input voltage range supported by LTC3875EUH#PBF? A: The input voltage range supported by LTC3875EUH#PBF is typically between 4.5V and 38V.
Q: What is the output voltage range that can be achieved using LTC3875EUH#PBF? A: The output voltage range achievable with LTC3875EUH#PBF depends on the external components used, but it can typically range from 0.6V to 5.5V.
Q: What is the maximum output current that LTC3875EUH#PBF can handle? A: LTC3875EUH#PBF can handle a maximum output current of up to 25A, depending on the design and thermal considerations.
Q: Can LTC3875EUH#PBF operate in a multi-phase configuration? A: Yes, LTC3875EUH#PBF can be configured to operate in a multi-phase configuration by synchronizing multiple controllers together.
Q: Does LTC3875EUH#PBF support adjustable switching frequency? A: Yes, LTC3875EUH#PBF supports adjustable switching frequency, allowing users to optimize efficiency or minimize component size based on their requirements.
Q: What protection features does LTC3875EUH#PBF offer? A: LTC3875EUH#PBF offers various protection features, including overvoltage protection (OVP), undervoltage lockout (UVLO), overcurrent protection (OCP), and thermal shutdown.
Q: Can LTC3875EUH#PBF be used in automotive applications? A: Yes, LTC3875EUH#PBF is suitable for automotive applications as it meets the necessary requirements such as AEC-Q100 qualification and operates over a wide temperature range.
Q: What type of control loop does LTC3875EUH#PBF use? A: LTC3875EUH#PBF uses a voltage mode control loop to regulate the output voltage.
Q: Are there any evaluation boards or reference designs available for LTC3875EUH#PBF? A: Yes, Analog Devices provides evaluation boards and reference designs for LTC3875EUH#PBF, which can help users quickly prototype and implement their power supply solutions.
Please note that the answers provided here are general and may vary depending on specific application requirements and design considerations. It is always recommended to refer to the datasheet and application notes provided by the manufacturer for detailed information.