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
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)
Terminal Finish
Tin/Lead (Sn/Pb)
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
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
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
Control Mode
VOLTAGE-MODE
Frequency - Switching
190kHz
Control Technique
PULSE WIDTH MODULATION
Switcher Configuration
SINGLE
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
RoHS Status
RoHS Compliant
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
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
-
-
-
-
-
-
-
-
-
-
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
-
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