A Comprehensive Guide to LTC7851EUHH-1#TRPBF DC-DC Switching Controller
Linear Technology/Analog Devices
3V~5.5V 58-Pin LTC7851 DC to DC converter IC 4 Outputs 250kHz~3MHz PWM Signal









3V~5.5V 58-Pin LTC7851 DC to DC converter IC 4 Outputs 250kHz~3MHz PWM Signal
This article provides an in-depth analysis of the LTC7851EUHH-1#TRPBF DC-DC switching controller by Linear Technology/Analog Devices. It covers the description, features, applications, reference designs, alternative parts, and FAQs related to this versatile and efficient voltage regulator.
Product Introduction
Description:
The LTC7851EUHH-1#TRPBF is a high-performance DC-DC switching controller designed for step-down voltage regulation applications. It features four outputs with PWM signal output type and positive output configuration. The controller operates over a wide input voltage range of 3V to 5.5V and offers various control features such as current limit, enable, frequency control, power good, soft start, and tracking. With a buck topology and a switching frequency range of 250kHz to 3MHz, the LTC7851EUHH-1#TRPBF provides efficient power conversion for a variety of applications.
Features:
- Four outputs for versatile power distribution
- Wide input voltage range of 3V to 5.5V
- Control features including current limit, enable, frequency control, and more
- High efficiency with buck topology and switching frequency range of 250kHz to 3MHz
- ROHS3 compliant for environmental sustainability
Applications:
Primary Applications:
1. Industrial power supplies
2. Automotive electronics
3. Telecommunications equipment
4. Server and data center power distribution
Secondary Applications:
1. Consumer electronics
2. LED lighting
3. Battery charging systems
Applicable Specific Modules:
1. Power distribution modules
2. Voltage regulation modules
3. Power management modules
Reference Designs:
1. High-Efficiency Industrial Power Supply Design
2. Automotive Electronics Power Distribution System
3. Server Power Management Solution
Alternative Parts:
1. LTC7850EUHH-1#TRPBF DC-DC Switching Controller
2. LTC7852EUHH-1#TRPBF DC-DC Switching Controller
3. LTC7853EUHH-1#TRPBF DC-DC Switching Controller
FAQs:
Q1: What is the maximum duty cycle of the LTC7851EUHH-1#TRPBF?
A1: The LTC7851EUHH-1#TRPBF has a maximum duty cycle of 91.5%.
Q2: Is the LTC7851EUHH-1#TRPBF suitable for automotive applications?
A2: Yes, the LTC7851EUHH-1#TRPBF is suitable for automotive electronics due to its wide input voltage range and high efficiency.
Q3: Does the LTC7851EUHH-1#TRPBF support synchronous rectification?
A3: No, the LTC7851EUHH-1#TRPBF does not support synchronous rectification.
In conclusion, the LTC7851EUHH-1#TRPBF DC-DC switching controller offers a comprehensive solution for various voltage regulation applications. Its high efficiency, versatile features, and wide input voltage range make it a suitable choice for industrial, automotive, telecommunications, and other electronic systems. With the availability of reference designs and alternative parts, designers have the flexibility to customize their power management solutions using this advanced controller.
Specifications
- TypeParameter
- Lifecycle Status
Lifecycle Status refers to the current stage of an electronic component in its product life cycle, indicating whether it is active, obsolete, or transitioning between these states. An active status means the component is in production and available for purchase. An obsolete status indicates that the component is no longer being manufactured or supported, and manufacturers typically provide a limited time frame for support. Understanding the lifecycle status is crucial for design engineers to ensure continuity and reliability in their projects.
PRODUCTION (Last Updated: 3 weeks ago) - Factory Lead Time16 Weeks
- Mounting Type
The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.
Surface Mount - Package / Case
refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.
58-WFQFN Exposed Pad - Number of Pins58
- Operating Temperature
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
-40°C~125°C TJ - Packaging
Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.
Tape & Reel (TR) - Published2016
- Part Status
Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.
Active - Moisture Sensitivity Level (MSL)
Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures
1 (Unlimited) - Base Part Number
The "Base Part Number" (BPN) in electronic components serves a similar purpose to the "Base Product Number." It refers to the primary identifier for a component that captures the essential characteristics shared by a group of similar components. The BPN provides a fundamental way to reference a family or series of components without specifying all the variations and specific details.
LTC7851 - Function
The parameter "Function" in electronic components refers to the specific role or purpose that the component serves within an electronic circuit. It defines how the component interacts with other elements, influences the flow of electrical signals, and contributes to the overall behavior of the system. Functions can include amplification, signal processing, switching, filtering, and energy storage, among others. Understanding the function of each component is essential for designing effective and efficient electronic systems.
Step-Down - Number of Outputs4
- Output Type
The "Output Type" parameter in electronic components refers to the type of signal or data that is produced by the component as an output. This parameter specifies the nature of the output signal, such as analog or digital, and can also include details about the voltage levels, current levels, frequency, and other characteristics of the output signal. Understanding the output type of a component is crucial for ensuring compatibility with other components in a circuit or system, as well as for determining how the output signal can be utilized or processed further. In summary, the output type parameter provides essential information about the nature of the signal that is generated by the electronic component as its output.
PWM Signal - Output Configuration
Output Configuration in electronic components refers to the arrangement or setup of the output pins or terminals of a device. It defines how the output signals are structured and how they interact with external circuits or devices. The output configuration can determine the functionality and compatibility of the component in a circuit design. Common types of output configurations include single-ended, differential, open-drain, and push-pull configurations, each serving different purposes and applications in electronic systems. Understanding the output configuration of a component is crucial for proper integration and operation within a circuit.
Positive - Voltage - Supply (Vcc/Vdd)
Voltage - Supply (Vcc/Vdd) is a key parameter in electronic components that specifies the voltage level required for the proper operation of the device. It represents the power supply voltage that needs to be provided to the component for it to function correctly. This parameter is crucial as supplying the component with the correct voltage ensures that it operates within its specified limits and performance characteristics. It is typically expressed in volts (V) and is an essential consideration when designing and using electronic circuits to prevent damage and ensure reliable operation.
3V~5.5V - Control Features
Control features in electronic components refer to specific functionalities or characteristics that allow users to manage and regulate the operation of the component. These features are designed to provide users with control over various aspects of the component's performance, such as adjusting settings, monitoring parameters, or enabling specific modes of operation. Control features can include options for input/output configurations, power management, communication protocols, and other settings that help users customize and optimize the component's behavior according to their requirements. Overall, control features play a crucial role in enhancing the flexibility, usability, and performance of electronic components in various applications.
Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking - Topology
In the context of electronic components, "topology" refers to the arrangement or configuration of the components within a circuit or system. It defines how the components are connected to each other and how signals flow between them. The choice of topology can significantly impact the performance, efficiency, and functionality of the electronic system. Common topologies include series, parallel, star, mesh, and hybrid configurations, each with its own advantages and limitations. Designers carefully select the appropriate topology based on the specific requirements of the circuit to achieve the desired performance and functionality.
Buck - Frequency - Switching
"Frequency - Switching" in electronic components refers to the rate at which a device, such as a transistor or switching regulator, turns on and off during operation. This parameter is crucial in determining the efficiency and performance of power converters, oscillators, and other circuits that rely on rapid switching. Higher switching frequencies typically allow for smaller component sizes but may require more advanced design considerations to manage heat and electromagnetic interference.
250kHz~3MHz - Synchronous Rectifier
Synchronous rectification is a technique for improving the efficiency of rectification by replacing diodes with actively controlled switches, usually power MOSFETs or power bipolar junction transistors (BJT).
No - Max Duty Cycle
Max Duty Cycle refers to the maximum percentage of time that an electronic component, such as a switch or a power supply, can be in an "on" state during a defined time period. It is an important parameter in pulse-width modulated (PWM) systems and helps determine how often a device can operate without overheating or sustaining damage. By specifying the maximum duty cycle, manufacturers provide guidance on the safe operational limits of the component, ensuring reliability and efficiency in various applications.
91.5 % - Output Phases
Output Phases in electronic components refer to the number of distinct output signals or waveforms that the component can generate. This parameter is commonly associated with devices such as power inverters, motor drives, and signal generators. The output phases indicate how many separate signals can be produced simultaneously by the component, with each phase typically representing a different electrical waveform or signal. Understanding the output phases of an electronic component is important for designing and implementing systems that require multiple output signals or for ensuring compatibility with other components in a circuit.
1 - RoHS Status
RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.
ROHS3 Compliant
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