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.
Through Hole
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.
TO-220-5
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.
5
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.
-40°C~125°C TJ
Series
Series, in the context of electronic components, refers to the arrangement of components in a circuit. When components are connected in series, they form a single path for current to flow through. The total resistance of a series circuit is the sum of the individual resistances of each component. Series connections are often used to control the flow of current in a circuit, as the total resistance can be adjusted by changing the number or type of components in the series.
SIMPLE SWITCHER®
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.
1 (Unlimited)
Terminal Finish
Matte Tin (Sn)
Subcategory
Switching Regulator or Controllers
Technology
Technology, in the context of electronic components, refers to the specific manufacturing process and materials used to create the component. It encompasses the semiconductor fabrication techniques, such as the type of transistor used (e.g., MOSFET, BJT), the gate oxide thickness, and the interconnect materials. Technology also includes the packaging type, such as surface mount or through-hole, and the leadframe or substrate material. The technology used impacts the component's performance characteristics, such as speed, power consumption, and reliability.
BIPOLAR
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.
52kHz
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-Up, Step-Up/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.
12V
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.
Fixed
Operating Supply Voltage
40V
Analog IC - Other Type
SWITCHING REGULATOR
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
Current - Output
3A Switch
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.
10mA
Voltage - Output (Min/Fixed)
12V
Topology
Boost, Flyback, Forward Converter
Control Mode
CURRENT-MODE
Nominal Output Voltage
12V
Height
Height, in the context of electronic components, refers to the vertical dimension of the component. It is typically measured in millimeters (mm) or inches (in). Height is an important parameter to consider when designing and assembling electronic circuits, as it affects the overall size and form factor of the device. Components with a smaller height are often preferred for applications where space is limited, such as in portable devices or embedded systems.
8.89mm
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.
10.16mm
RoHS Status
ROHS3 Compliant
Description
The LM1577/LM2577 are monolithic integrated circuits that provide all the power and control functions for step-up (boost), flyback, and forward converter switching regulators. The device is available in three different output voltage versions: 12V, 15V, and adjustable.
Requiring a minimum number of external components, these regulators are cost-effective and simple to use. Listed in this data sheet are a family of standard inductors and flyback transformers designed to work with these switching regulators.
Included on the chip is a 3.0A NPN switch and its associated protection circuitry, consisting of current and thermal limiting, and undervoltage lockout. Other features include a 52 kHz fixed-frequency oscillator that requires no external components, a soft start mode to reduce in-rush current during start-up, and current mode control for improved rejection of input voltage and output load transients.
Features
Requires few external components
NPN output switches 3.0A, can stand off 65V
Wide input voltage range: 3.5V to 40V
Current-mode operation for improved transient response, line regulation, and current limit
52 kHz internal oscillator
Soft-start function reduces in-rush current during start-up
Output switch protected by current limit, undervoltage lockout, and thermal shutdown
Applications
Simple boost regulator
Flyback and forward regulators
Multiple-output regulator
-
Image
Part Number
Manufacturer
Mount
Mounting Type
Package / Case
Number of Pins
Weight
Operating Temperature
Packaging
Series
JESD-609 Code
Pbfree Code
Part Status
Moisture Sensitivity Level (MSL)
Number of Terminations
ECCN Code
Terminal Finish
Subcategory
Technology
Terminal Position
Frequency
Base Part Number
Function
Number of Outputs
Efficiency
Output Voltage
Output Type
Max Output Current
Operating Supply Voltage
Input Voltage-Nom
Min Supply Voltage
Analog IC - Other Type
Output Configuration
Current - Output
Quiescent Current
Max Output Voltage
Voltage - Output (Min/Fixed)
Topology
Control Mode
Synchronous Rectifier
Min Output Voltage
Nominal Output Voltage
Height
Length
Width
REACH SVHC
RoHS Status
Lead Free
Factory Lead Time
Lifecycle Status
Terminal Form
Peak Reflow Temperature (Cel)
Voltage - Input (Max)
Voltage - Input (Min)
Frequency - Switching
Voltage - Output (Max)
Thickness
Radiation Hardening
View Compare
-
LM2577T-12/NOPB
Through Hole
Through Hole
TO-220-5
5
4.535924g
-40°C~125°C TJ
Tube
SIMPLE SWITCHER®
e3
no
Obsolete
1 (Unlimited)
5
EAR99
Matte Tin (Sn)
Switching Regulator or Controllers
BIPOLAR
SINGLE
52kHz
LM2577
Step-Up, Step-Up/Step-Down
1
80 %
12V
Fixed
3A
40V
5V
3.5V
SWITCHING REGULATOR
Positive
3A Switch
10mA
12.6V
12V
Boost, Flyback, Forward Converter
CURRENT-MODE
No
11.4V
12V
8.89mm
10.16mm
4.7mm
No SVHC
ROHS3 Compliant
Contains Lead
-
-
-
-
-
-
-
-
-
-
-
-
Surface Mount
Surface Mount
8-PowerSOIC (0.154, 3.90mm Width)
8
-
-40°C~125°C TJ
Tube
-
e3
yes
Active
3 (168 Hours)
8
EAR99
Matte Tin (Sn)
-
-
DUAL
-
LM25017
Step-Down
1
-
40V
Adjustable
650mA
-
9V
-
SWITCHING REGULATOR
Positive
-
1.75mA
40V
-
Buck
-
Yes
1.225V
-
1.7mm
4.89mm
3.9mm
No SVHC
ROHS3 Compliant
Lead Free
6 Weeks
ACTIVE (Last Updated: 1 day ago)
GULL WING
260
48V
7.5V
Up to 1MHz
40V
1.48mm
No
-
Surface Mount
Surface Mount
8-PowerSOIC (0.154, 3.90mm Width)
8
-
-40°C~125°C TJ
Tube
-
e3
yes
Active
3 (168 Hours)
8
EAR99
Matte Tin (Sn)
-
-
DUAL
-
LM25018
Step-Down
1
-
40V
Adjustable
325mA
-
9V
-
SWITCHING REGULATOR
Positive
-
1.75mA
40V
-
Buck
-
Yes
1.225V
-
1.7mm
4.89mm
3.9mm
No SVHC
ROHS3 Compliant
Lead Free
6 Weeks
ACTIVE (Last Updated: 1 day ago)
GULL WING
260
48V
7.5V
Up to 1MHz
40V
1.48mm
No