Microsemi Corporation LX1681CDM

Mfr.Part #:

LX1681CDM

Manufacturer:

Description:
IC REG CTRLR BUCK 8SOIC

RoHS Status:

RoHS

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Specifications

Product Details

Product Comparison

Mount
Surface Mount
Mounting Type

Mounting Type refers to the method by which an electronic component is attached to a printed circuit board (PCB) or other surface. Common mounting types include: * Through-hole: Component leads are inserted into holes in the PCB and soldered on the other side. * Surface-mount: Component is placed on the surface of the PCB and soldered in place. * Press-fit: Component is pressed into place on the PCB without soldering. * Socket: Component is inserted into a socket on the PCB, allowing for easy replacement. The mounting type is determined by factors such as the component's size, shape, and power requirements.

Surface Mount
Package / Case

Package / Case refers to the physical housing or enclosure that encapsulates an electronic component. It provides protection, facilitates handling, and enables electrical connections. The package type determines the component's size, shape, pin configuration, and mounting options. Common package types include DIP (dual in-line package), SOIC (small outline integrated circuit), and BGA (ball grid array). The package also influences the component's thermal and electrical performance.

8-SOIC (0.154, 3.90mm Width)
Number of Pins

Number of Pins: Indicates the number of electrical connections available on the component. These pins are used to connect the component to other components or circuits on a printed circuit board (PCB). The number of pins determines the functionality and connectivity options of the component. It is important to ensure that the component has the correct number of pins for the intended application.

8
Operating Temperature

Operating Temperature is the range of temperatures at which an electronic component can function properly. It is typically specified in degrees Celsius (°C) and indicates the minimum and maximum temperatures at which the component can operate without experiencing damage or degradation. Operating Temperature is an important parameter to consider when designing electronic circuits, as it ensures that the components will function reliably in the intended operating environment.

0°C~70°C TA
Published
2005
JESD-609 Code
e0
Pbfree Code
yes
Part Status

Part Status is an electronic component parameter that indicates the availability and production status of a component. It is typically used to inform customers about the availability of a component, whether it is in production, end-of-life, or obsolete. Part Status can also provide information about any restrictions or limitations on the component's use, such as whether it is only available for certain applications or if it has been discontinued.

Obsolete
Moisture Sensitivity Level (MSL)

Moisture Sensitivity Level (MSL) is a measure of the susceptibility of a surface mount electronic component to moisture-induced damage during soldering. It is classified into six levels, from 1 (least sensitive) to 6 (most sensitive). MSL is determined by the materials used in the component's construction, including the solderability of its terminals and the presence of moisture-absorbing materials. Components with higher MSL ratings require more stringent handling and storage conditions to prevent moisture absorption and subsequent damage during soldering.

2 (1 Year)
Number of Terminations
8
ECCN Code
EAR99
Terminal Finish
Tin/Lead (Sn/Pb)
Terminal Position
DUAL
Terminal Form
GULL WING
Peak Reflow Temperature (Cel)
260
Frequency

Frequency, in the context of electronic components, refers to the rate at which an alternating current or voltage changes direction per second. It is measured in Hertz (Hz), which represents one cycle per second. Frequency is a crucial parameter for various electronic components, such as capacitors, inductors, and resonators. It determines the component's ability to store or release energy, filter signals, and resonate at specific frequencies. Understanding the frequency characteristics of electronic components is essential for designing and optimizing electronic circuits.

230kHz
Reflow Temperature-Max (s)
40
Base Part Number
LX1681
Function

Function refers to the primary purpose or role of an electronic component within a circuit. It describes the specific task or operation that the component is designed to perform. For example, a resistor's function is to limit current flow, a capacitor's function is to store electrical energy, and a transistor's function is to amplify or switch signals. Understanding the function of a component is crucial for selecting the appropriate component for a particular application and ensuring its proper operation within the circuit.

Step-Down
Number of Outputs

Number of Outputs refers to the number of independent output signals or channels that an electronic component can provide. It indicates the capability of the component to drive multiple external devices or circuits simultaneously. A higher number of outputs allows for greater flexibility and connectivity in electronic systems.

1
Output Voltage

Output Voltage is the voltage level produced by an electronic component when it is operating. It is typically measured in volts (V) and can be either positive or negative. The output voltage of a component is determined by its design and the input voltage applied to it. For example, a voltage regulator will produce a fixed output voltage regardless of the input voltage, while an amplifier will produce an output voltage that is proportional to the input voltage.

4.5V
Output Type

Output type refers to the type of signal or power that an electronic component can produce. It can be analog or digital, AC or DC, and can vary in voltage, current, or power levels. The output type is determined by the component's design and is crucial for matching it with other components in a circuit. Understanding the output type ensures proper signal processing, power delivery, and overall system functionality.

Transistor Driver
Operating Supply Voltage
5V
Input Voltage-Nom
5V
Analog IC - Other Type
SWITCHING CONTROLLER
Output Configuration

Output Configuration refers to the arrangement of output terminals or pins on an electronic component. It specifies the number, type, and arrangement of these terminals, allowing for various connection options. This parameter is crucial for determining the component's compatibility with other devices and ensuring proper signal flow within a circuit.

Positive
Quiescent Current

Quiescent current is the amount of current drawn by an electronic component when it is not actively performing its intended function. It is typically measured in milliamps (mA) or microamps (µA). Quiescent current is important because it can affect the overall power consumption of a circuit, especially in battery-powered devices. Components with high quiescent current can drain batteries more quickly than those with low quiescent current.

5mA
Control Features
Current Limit, Soft Start
Input Voltage (Min)
4.4V
Topology
Buck
Control Mode
VOLTAGE-MODE
Output Current-Max
1A
Frequency - Switching
190kHz
Control Technique
PULSE WIDTH MODULATION
Synchronous Rectifier
No
Switcher Configuration
SINGLE
Height Seated (Max)
2mm
Length

Length, in the context of electronic components, refers to the physical dimension of a component along its longest axis. It is typically measured in millimeters (mm) or inches (in). Length is a crucial parameter for determining the physical size and space requirements of a component on a printed circuit board (PCB) or other assembly. It also affects the component's electrical characteristics, such as inductance and capacitance, which can be influenced by the length of conductors or traces within the component.

4.9mm
Width
3.9mm
RoHS Status
RoHS Compliant
Lead Free
Lead Free
Description
The LX1681/1682 are monolithic, pulse-width modulator controller ICs designed for implementing flexible, low-cost buck (step-down) regulator supplies with minimal external components. The LX1681 is a non-synchronous controller, while the LX1682 has a synchronous driver for higher efficiency. The output voltage is adjustable by means of a resistor divider to set the voltage between 1.25V and 4.5V. Short-circuit current limiting can be implemented without expensive current sense resistors. Current is sensed using the voltage drop across the Rosos of the MOSFET. Sensing is delayed for 1us to eliminate MOSFET ringing errors. Hiccup-mode fault protection reduces average power to the power elements during short-circuit conditions. Switching frequency is fixed at 200kHz for optimal cost and space. Under-voltage lockout and soft-start provide optimal start-up performance. Pulling the soft-start pin to ground can disable the LX1681/82. Small 8-pin SOIC packaging reduces board space. Optimized for 5V-to-3.3V or 5V-to-2.5V conversion, the LX1681/82 can also be used for converting 12V to 5V, 3.3V, or other voltages with high efficiency, eliminating the need for bulky heat sinks.

Features
Fixed 200kHz Switching Frequency
Constant Frequency Voltage-Mode Control Requires NO External Compensation
Hiccup-Mode Over-Current Protection
High Efficiency
Output Voltage Set By Resistor Divider
Under-Voltage Lockout
Soft-Start And Enable
Synchronous Rectification (LX1682)
Non-Synchronous Rectification (LX1681)
Small, 8-pin Surface Mount Package

Applications
5V to 3.3V Or Less Buck Regulators
FPGA Supplies
Microprocessor Chipset Supplies (e.g. Camino, Whitney, etc.)
Rambus RIMM™ Supplies
Hard Disk Drives
Computer Add-on Cards
  • Image
    Part Number
    Manufacturer
    Mount
    Mounting Type
    Package / Case
    Number of Pins
    Operating Temperature
    Published
    JESD-609 Code
    Pbfree Code
    Part Status
    Moisture Sensitivity Level (MSL)
    Number of Terminations
    ECCN Code
    Terminal Finish
    Terminal Position
    Terminal Form
    Peak Reflow Temperature (Cel)
    Frequency
    Reflow Temperature-Max (s)
    Base Part Number
    Function
    Number of Outputs
    Output Voltage
    Output Type
    Operating Supply Voltage
    Input Voltage-Nom
    Analog IC - Other Type
    Output Configuration
    Quiescent Current
    Control Features
    Input Voltage (Min)
    Topology
    Control Mode
    Output Current-Max
    Frequency - Switching
    Control Technique
    Synchronous Rectifier
    Switcher Configuration
    Height Seated (Max)
    Length
    Width
    RoHS Status
    Lead Free
    Series
    Terminal Pitch
    Max Output Current
    Voltage - Supply (Vcc/Vdd)
    Input Voltage (Max)
    Duty Cycle (Max)
    Clock Sync
    Output Phases
    View Compare
  • LX1681CDM
    LX1681CDM
    Surface Mount
    Surface Mount
    8-SOIC (0.154, 3.90mm Width)
    8
    0°C~70°C TA
    2005
    e0
    yes
    Obsolete
    2 (1 Year)
    8
    EAR99
    Tin/Lead (Sn/Pb)
    DUAL
    GULL WING
    260
    230kHz
    40
    LX1681
    Step-Down
    1
    4.5V
    Transistor Driver
    5V
    5V
    SWITCHING CONTROLLER
    Positive
    5mA
    Current Limit, Soft Start
    4.4V
    Buck
    VOLTAGE-MODE
    1A
    190kHz
    PULSE WIDTH MODULATION
    No
    SINGLE
    2mm
    4.9mm
    3.9mm
    RoHS Compliant
    Lead Free
    -
    -
    -
    -
    -
    -
    -
    -
    -
  • LX1672-06CLQ
    Surface Mount
    Surface Mount
    38-VFQFN Exposed Pad
    38
    0°C~70°C TA
    2005
    e3
    yes
    Obsolete
    2 (1 Year)
    38
    -
    MATTE TIN
    QUAD
    -
    260
    690kHz
    40
    LX1672
    Step-Down
    3
    -
    Transistor Driver
    -
    5V
    DUAL SWITCHING CONTROLLER
    Positive
    -
    Current Limit, Soft Start
    4.5V
    Buck
    VOLTAGE-MODE
    -
    600kHz
    PULSE WIDTH MODULATION
    Yes
    PUSH-PULL
    0.8mm
    7mm
    5mm
    RoHS Compliant
    Lead Free
    LoadSHARE™
    0.5mm
    1A
    4.5V~5.5V
    5.5V
    70%
    No
    2
  • LX1672-05CPW
    Surface Mount
    Surface Mount
    28-TSSOP (0.173, 4.40mm Width)
    28
    0°C~70°C TA
    2005
    e3
    yes
    Obsolete
    2 (1 Year)
    28
    EAR99
    Matte Tin (Sn)
    DUAL
    GULL WING
    260
    575kHz
    40
    LX1672
    Step-Down
    3
    -
    Transistor Driver
    -
    5V
    DUAL SWITCHING CONTROLLER
    Positive
    -
    Current Limit, Soft Start
    4.5V
    Buck
    VOLTAGE-MODE
    -
    500kHz
    PULSE WIDTH MODULATION
    Yes
    PUSH-PULL
    1.1mm
    9.7mm
    4.4mm
    RoHS Compliant
    Contains Lead
    LoadSHARE™
    0.65mm
    1A
    4.5V~5.5V
    5.5V
    75%
    No
    2

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