LM5117 Wide Input Sync Buck with Current Monitor: Pinout and Datasheet

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Published: 28 September 2022 | Last Updated: 28 September 2022

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LM5117EVAL/NOPB

LM5117EVAL/NOPB

Texas Instruments

BOARD EVAL FOR LM5117

Purchase Guide

BOARD EVAL FOR LM5117

This article provides you with a basic overview of the LM5117 regulator, including its pin descriptions, functions and specifications, CAD models, etc., to help you quickly understand what LM5117 is.

This video will tell you something about LM5117 Wide Input Sync Buck with Current Monitor.

LM5117 Wide Input Sync Buck with Current Monitor

LM5117 Description

The LM5117 is a synchronous buck controller designed for step-down regulator applications that require a high voltage or a wide range of input voltages. The control method is current mode control with an emulated current ramp. Current mode control has inherent line feed-forward, cycle-by-cycle current limiting, and is simple to loop compensate. The use of an emulated control ramp reduces the pulse-width modulation circuit's noise sensitivity, allowing reliable control of very small duty cycles required in high input voltage applications.


LM5117 Features

  • Emulated Peak Current Mode Control

  • Wide Operating Range from 5.5 V to 65 V

  • Robust 3.3-A Peak Gate Drives

  • Adaptive Dead-Time Output Driver Control

  • Free-Run or Synchronizable Clock up to 750 kHz

  • Optional Diode Emulation Mode

  • Programmable Output from 0.8 V

  • Precision 1.5% Voltage Reference

  • Analog Current Monitor

  • Programmable Current Limit

  • Hiccup Mode Overcurrent Protection

  • Programmable Soft-Start and Tracking

  • Programmable Line Undervoltage Lockout

  • Programmable Switchover to External Bias Supply

  • Thermal Shutdown


LM5117 Pinout and configurations

pinout1.jpg

pinout2.jpg

Pin NumberPin Functions
Pin 1UVLO is the under-voltage lockout pin. The voltage regulator is shut down below 0.4V, and the voltage regulator is in standby mode when it is greater than 0.4V and less than 1.25V. The voltage regulator above 1.25V works normally and stably.
Pin 2DEMB is a diode emulation mode pin, which can be floated if not needed.
Pin 3RES restarts the timer pin and can configure the hiccup current-limiting mode.
Pin 4SS can set the internal reference slope of the internal error amplifier.
Pin 5RT sets the clock frequency and the maximum frequency can be configured to 750kHz, just connect a resistor between the ground, and connect a capacitor to synchronize to the external frequency.
Pin 6Ground
Pin 7VCCDIS is an optional input pin for disabling the regulator.
Pin 8FB feedback pin is used to stabilize the set output, and the reference base is 0.8V.
Pin 9COMP is the output of the internal error amplifier
Pin 10CM is the output of the current monitor, which can detect the average current value for programming.
Pin 11feet RAMP is the PWM ramp signal.
Pin 12CS is the current detection input pin.
Pin 13Ground
Pin 14Ground
Pin 15Pin 15 is the bottom MOS output drive pin.
Pin 16Pin 16 is the VCC power bias pin
Pin 17SW is the switch node of the buck regulator and provides a bootstrap loop.
Pin 18HO is a high bridge MOS drive output
Pin 19HB is the Gaoqiao bootstrap power input
Pin 20VIN is the power supply voltage input source of the VCC regulator


Specifications

Texas Instruments LM5117EVAL/NOPB technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments LM5117EVAL/NOPB.
  • Type
    Parameter
  • Factory Lead Time
    4 Weeks
  • Package / Case

    refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.

    Module
  • 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)
  • Voltage - Output

    Voltage - Output is a parameter that refers to the electrical potential difference between the output terminal or pin of an electronic component and a reference point, typically ground. It indicates the level of voltage that the component is capable of providing at its output under specified operating conditions. This parameter is crucial in determining the performance and functionality of the component in a circuit, as it directly affects the signal or power being delivered to other components or devices connected to the output. Engineers and designers use the voltage output specification to ensure compatibility and proper functioning of the component within the overall system.

    12V
  • 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.

    50kHz~750kHz
  • Utilized IC / Part

    Utilized IC / Part is a parameter that refers to the extent to which an integrated circuit (IC) or electronic component is being used or consumed within a system or application. It typically indicates the percentage or ratio of the component's capabilities that are being utilized in a given scenario. This parameter is important for assessing the efficiency and performance of the component, as well as for determining if the component is being underutilized or overburdened in a particular application. Monitoring and optimizing the utilization of ICs and electronic parts can help improve overall system reliability, efficiency, and cost-effectiveness.

    LM5117
  • Supplied Contents

    Supplied Contents in electronic components refers to the items or materials that are included with the component when it is purchased. These contents can vary depending on the specific component and manufacturer, but typically include things like user manuals, installation guides, cables, connectors, and any additional accessories needed for the component to function properly. The supplied contents are important for ensuring that the user has everything they need to set up and use the electronic component correctly. It is recommended to carefully check the supplied contents upon receiving a new electronic component to make sure that nothing is missing and to familiarize oneself with the included materials for optimal use.

    Board(s)
  • Evaluation Kit

    An Evaluation Kit is a collection of hardware and software components designed to help engineers and developers assess and test the functionality of a particular electronic component or system. It typically includes a development board, sample code, utilities, and documentation to facilitate development and prototype testing. Evaluation Kits enable users to quickly prototype applications, evaluate performance characteristics, and determine compatibility with other systems. They are commonly used in the design and development phases of electronic projects to simplify the integration of complex components.

    Yes
  • Board Type

    Board Type refers to the specific configuration or category of a printed circuit board (PCB) used in electronic devices. It defines the characteristics and design of the board, such as single-sided, double-sided, or multilayer constructions. The Board Type impacts factors like signal integrity, power distribution, and thermal management, influencing the overall performance and functionality of the electronic component. Different applications and environments may require specific Board Types to meet durability and operational requirements.

    Fully Populated
  • Main Purpose

    The parameter "Main Purpose" in electronic components refers to the primary function or intended use of the component within a circuit or system. It describes the specific role that the component plays in the overall functionality of the electronic device. Understanding the main purpose of a component is crucial for proper selection, placement, and integration within a circuit design. This parameter helps engineers and designers ensure that each component is utilized effectively and efficiently to achieve the desired performance and functionality of the electronic system.

    DC/DC, Step Down
  • Outputs and Type

    Outputs and Type in electronic components refer to the specific signals or power levels that a device can produce or deliver. This parameter indicates the nature of the output, such as voltage, current, or digital signals, and categorizes them into types like analog or digital outputs. It is crucial for understanding how the component interacts with other devices in a circuit and ensures compatibility within electronic systems.

    1, Non-Isolated
  • Regulator Topology

    In electronic components, "Regulator Topology" refers to the specific configuration or design of a voltage regulator circuit. A voltage regulator is a device that maintains a constant output voltage regardless of changes in input voltage or load conditions. The regulator topology determines how the components within the circuit are connected and how they function together to achieve voltage regulation. Common regulator topologies include linear regulators, switching regulators, and shunt regulators, each with its own advantages and limitations. Understanding the regulator topology is crucial for selecting the appropriate voltage regulator for a particular application based on factors such as efficiency, cost, size, and performance requirements.

    Buck
  • REACH SVHC

    The parameter "REACH SVHC" in electronic components refers to the compliance with the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation regarding Substances of Very High Concern (SVHC). SVHCs are substances that may have serious effects on human health or the environment, and their use is regulated under REACH to ensure their safe handling and minimize their impact.Manufacturers of electronic components need to declare if their products contain any SVHCs above a certain threshold concentration and provide information on the safe use of these substances. This information allows customers to make informed decisions about the potential risks associated with using the components and take appropriate measures to mitigate any hazards.Ensuring compliance with REACH SVHC requirements is essential for electronics manufacturers to meet regulatory standards, protect human health and the environment, and maintain transparency in their supply chain. It also demonstrates a commitment to sustainability and responsible manufacturing practices in the electronics industry.

    No SVHC
  • RoHS Status

    RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.

    Non-RoHS Compliant
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LM5117 CAD Models

Symbol                                                    Footprint

symbol20.jpgfootprint20.jpg

3D Models

3d20-1.jpg3d20-2.jpg3d20-3.jpg

20 pins



Symbol                                                  Print

symbol24.jpgfootprint24.jpg

3D Models

3d24-1.jpg3d24-2.jpg3d24-3.jpg

24 pins


LM5117 Typical Application

Typical Application.jpg

TA2.jpg

LM5117 Applications

  • Automotive Infotainment

  • Industrial DC-DC Motor Drivers

  • Automotive USB Power

  • Telecom Server


LM5117 Manufacturer

Texas Instruments Inc. (TI) is a technology company based in the United States that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers worldwide. Its headquarters are located in Dallas, Texas, in the United States. Based on sales volume, TI is one of the top ten semiconductor companies in the world. Texas Instruments' primary focus is on analog chips and embedded processors, which account for more than 80% of its revenue. TI also manufactures TI digital light processing (DLP) technology as well as educational technology products such as calculators, microcontrollers, and multi-core processors. TI currently holds over 43,000 patents worldwide.


LM5117 Recommended Operating Conditions


MIN            MAXUNIT
VIN(2)5.5                65V
VCC5.5                14V
HB to SW5.5                14V
Junction temperature-40               125


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Datasheet PDF

Download datasheets and manufacturer documentation for Texas Instruments LM5117EVAL/NOPB.

Parts with Similar Specs

Frequently Asked Questions

What is LM5117?

 LM5117 is a synchronous step-down controller produced by TI. It is widely used in communications and automotive electronics. It can be used as a core control device for low-voltage and high-power DC-stabilized power supplies with high stability and anti-interference. 

What are the advantages of DC-DC converter?

DC-DC converters have been widely used in machinery, communications, automobiles, and other fields as a secondary power supply because of their small size, lightweight, high efficiency, and low cost.

Why do we choose LM5117 as the core device circuit?

Because the circuit designed with the LM5117 as the core device has the characteristics of stable operation, high efficiency, and low output ripple, the overall loss of the low-voltage working circuit is reduced. Furthermore, the value of the LM3117 is that it can be used in step-up and step-down low-voltage high-power DC regulated power supplies, which is very important in the development of automotive electronics.

What’s the function of LM5117?

The LM5117 switching power supply step-down chip improves switching power supply stability. It is capable of driving dual-bridge MOS transistors directly. It also offers a plethora of expansion units, including current monitoring, that performs admirably.

How many pins does LM5117 have?

20 or 24.
LM5117EVAL/NOPB

Texas Instruments

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