Спецификации
| Атрибут | Ценность |
| Package / Case | Tape & Reel (TR),Cut Tape (CT) |
| Series | SIMPLE SWITCHER® |
| Part Status | Not For New Designs |
| Function | Step-Up, Step-Up/Step-Down |
| Output Configuration | Positive or Negative |
| Topology | Boost, Flyback, Forward Converter |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Voltage - Input (Min) | 3.5V |
| Voltage - Input (Max) | 40V |
| Voltage - Output (Min/Fixed) | 1.23V |
| Voltage - Output (Max) | 60V (Switch) |
| Current - Output | 3A (Switch) |
| Frequency - Switching | 52kHz |
| Synchronous Rectifier | No |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount |
Обзор
Description
The LM2577SX-ADJ is a versatile DC-DC boost (step-up) voltage regulator designed by Texas Instruments. It is capable of converting a lower voltage input to a higher voltage output, making it suitable for applications requiring voltage step-up from a battery or other low-voltage sources. This adjustable version allows users to set the output voltage to desired levels using external resistors, offering flexibility for different design requirements.
Key features of the LM2577SX-ADJ include:
1. Wide Input Voltage Range: Supports a broad range of input voltages, enhancing compatibility with various power sources.
2. High Efficiency: Efficient energy conversion reduces power loss, improving battery life in portable applications.
3. Switching Frequency: Operates at a fixed frequency, typically around 52 kHz, ensuring stability and reliability.
4. Current Limiting: Built-in overcurrent protection enhances safety and reliability.
5. Thermal Shutdown: Protects the device from overheating under high load or fault conditions.
Common applications include powering devices like LED drivers, battery-powered equipment, and portable electronics where higher voltages are required from smaller power sources.
Key features of the LM2577SX-ADJ include:
1. Wide Input Voltage Range: Supports a broad range of input voltages, enhancing compatibility with various power sources.
2. High Efficiency: Efficient energy conversion reduces power loss, improving battery life in portable applications.
3. Switching Frequency: Operates at a fixed frequency, typically around 52 kHz, ensuring stability and reliability.
4. Current Limiting: Built-in overcurrent protection enhances safety and reliability.
5. Thermal Shutdown: Protects the device from overheating under high load or fault conditions.
Common applications include powering devices like LED drivers, battery-powered equipment, and portable electronics where higher voltages are required from smaller power sources.
Equivalent
Equivalent products to the LM2577SX-ADJ chip, which is a step-up (boost) voltage regulator, include:
1. XL6009 - A versatile boost converter known for similar capabilities.
2. MC34063 - An adaptable DC-DC converter for a variety of applications.
3. LTC1871 - A high-efficiency boost controller with comparable features.
4. TPS61032 - A boost converter with adjustable output.
5. NCP1403 - A low voltage boost converter offering similar functionality.
Always verify specific requirements and characteristics, as substitutes may differ in pin configuration or electrical specifications.
1. XL6009 - A versatile boost converter known for similar capabilities.
2. MC34063 - An adaptable DC-DC converter for a variety of applications.
3. LTC1871 - A high-efficiency boost controller with comparable features.
4. TPS61032 - A boost converter with adjustable output.
5. NCP1403 - A low voltage boost converter offering similar functionality.
Always verify specific requirements and characteristics, as substitutes may differ in pin configuration or electrical specifications.
Features
The LM2577SX-ADJ is a versatile step-up (boost) DC-DC converter. Key features include:
1. Adjustable Output Voltage: It supports a wide output voltage range, which can be set using external resistors.
2. High Efficiency: Typically operates at efficiencies over 80%.
3. Wide Input Voltage Range: Suitable for a variety of power sources.
4. Fixed Switching Frequency: Operates at 52 kHz, aiding in predictable performance.
5. Internal Power Switch: Reduces the need for external components.
6. Output Current Capability: Can deliver up to 3A, depending on input/output voltage and conditions.
7. Thermal Shutdown Protection: Protects the device from overheating.
8. Current Limiting: Prevents excessive current draw that could damage the circuit.
9. Versatile Application: Suitable for battery-powered devices, power supplies, and other applications needing voltage boosting.
These features make the LM2577SX-ADJ a reliable choice for designing efficient power conversion circuits in a compact package.
1. Adjustable Output Voltage: It supports a wide output voltage range, which can be set using external resistors.
2. High Efficiency: Typically operates at efficiencies over 80%.
3. Wide Input Voltage Range: Suitable for a variety of power sources.
4. Fixed Switching Frequency: Operates at 52 kHz, aiding in predictable performance.
5. Internal Power Switch: Reduces the need for external components.
6. Output Current Capability: Can deliver up to 3A, depending on input/output voltage and conditions.
7. Thermal Shutdown Protection: Protects the device from overheating.
8. Current Limiting: Prevents excessive current draw that could damage the circuit.
9. Versatile Application: Suitable for battery-powered devices, power supplies, and other applications needing voltage boosting.
These features make the LM2577SX-ADJ a reliable choice for designing efficient power conversion circuits in a compact package.
Pinout
The LM2577SX-ADJ is a versatile adjustable voltage regulator used primarily for step-up (boost) converter applications. It typically comes in a 5-pin TO-263 package. Here's a brief overview of its pin functions:
1. Pin 1 (SW): This is the switch output pin. It is the collector of the internal NPN switch and is connected to the inductor and the diode in a boost converter setup.
2. Pin 2 (Ground): This is the ground pin for the device and is the reference point for the other pins.
3. Pin 3 (Feedback - FB): This pin is used to set the output voltage via an external resistor divider network. It compares a fraction of the output voltage to an internal reference.
4. Pin 4 (VC - Compensation): This pin provides compensation for the control loop, typically connected to an external capacitor and resistor for stability and transient response tuning.
5. Pin 5 (VIN): This is the input voltage supply pin, connected to the source voltage.
These pin functions make the LM2577SX-ADJ suitable for applications requiring efficient voltage step-up conversion.
1. Pin 1 (SW): This is the switch output pin. It is the collector of the internal NPN switch and is connected to the inductor and the diode in a boost converter setup.
2. Pin 2 (Ground): This is the ground pin for the device and is the reference point for the other pins.
3. Pin 3 (Feedback - FB): This pin is used to set the output voltage via an external resistor divider network. It compares a fraction of the output voltage to an internal reference.
4. Pin 4 (VC - Compensation): This pin provides compensation for the control loop, typically connected to an external capacitor and resistor for stability and transient response tuning.
5. Pin 5 (VIN): This is the input voltage supply pin, connected to the source voltage.
These pin functions make the LM2577SX-ADJ suitable for applications requiring efficient voltage step-up conversion.
Manufacturer
The LM2577SX-ADJ is manufactured by Texas Instruments. Texas Instruments, often abbreviated as TI, is an American technology company primarily known for designing and manufacturing semiconductors and integrated circuits. It is one of the largest producers of analog technology components, as well as digital signal processors (DSPs) and microcontrollers. TI serves a broad array of markets, including industrial, automotive, personal electronics, communications equipment, and enterprise systems. The company is renowned for its innovation in electronics and significant contributions to the technology industry, offering thousands of products that are used in a variety of applications worldwide.
Application
The LM2577SX-ADJ is a versatile step-up (boost) voltage regulator used in a variety of applications. It is commonly employed in battery-powered devices to increase voltage levels for components that require higher input, such as LED drivers, portable power supplies, and battery chargers. It's also used in power management systems for telecommunications equipment, automotive electronics, and industrial control systems. The adjustable output voltage feature allows it to be tailored for specific applications, making it suitable for general-purpose DC-DC conversion tasks requiring efficiency and reliability.
Package
The LM2577SX-ADJ is a voltage regulator in a TO-263 surface-mount package. It is an adjustable switching regulator typically used for step-up (boost) applications.
