LM5575MH

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LM5575MH

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IC REG BUCK ADJ 1.5A 16HTSSOP

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Thông số kỹ thuật

thuộc tính Giá trị
Package Bulk,Tube
Series SIMPLE SWITCHER®
ProductStatus Not For New Designs
Function Step-Down
OutputConfiguration Positive
Topology Buck
OutputType Adjustable
NumberofOutputs 1
Voltage-Input(Min) 6V
Voltage-Input(Max) 75V
Voltage-Output(Min/Fixed) 1.225V
Voltage-Output(Max) 70V
Current-Output 1.5A
Frequency-Switching 50kHz ~ 500kHz
SynchronousRectifier No
OperatingTemperature -40°C ~ 125°C (TJ)
MountingType Surface Mount
Package/Case 16-PowerTSSOP (0.173, 4.40mm Width)

Tổng quan

Description

The LM5575MH is a high-performance step-down switching regulator designed by Texas Instruments. It is capable of stepping down an input voltage ranging from 6V to 75V to a lower output voltage, making it suitable for a wide range of applications, including industrial and automotive systems. The device delivers up to 1.5A of continuous output current and operates at a fixed frequency of 500 kHz, which helps reduce the size of external components and improve efficiency.
The LM5575MH features an integrated N-channel MOSFET switch, thermal shutdown, and current limit protection to ensure reliable operation under various conditions. Additionally, it has a programmable soft-start feature to control the inrush current during startup. The device is also designed with a feedback loop that allows precise output voltage regulation, and it supports both continuous and discontinuous conduction modes.
Compactly packaged and equipped with a thermally enhanced TSSOP-16 package, the LM5575MH is ideal for space-constrained applications, providing efficient power conversion with minimal external components.

Equivalent

The LM5575MH is a step-down switching regulator. Equivalent or similar products include:
- LM5575 by Texas Instruments (different package options)
- LM2678 by Texas Instruments
- L4970A by STMicroelectronics
- MC34063 by ON Semiconductor (lower output current)
- LT3971 by Analog Devices (similar voltage range, different specifications)
These alternatives may vary in specifications like current output, voltage range, or package type, so it's important to verify compatibility with your specific application.

Features

The LM5575MH is a step-down switching voltage regulator designed for high-efficiency power conversion applications. Key features of this device include:
1. Wide Input Voltage Range: It operates with input voltages from 6V to 75V, making it suitable for a variety of power sources.
2. Adjustable Output Voltage: The output voltage can be set between 1.225V and 70V, allowing flexibility in different applications.
3. High Efficiency: The regulator is designed to achieve high conversion efficiency, reducing power loss and heat generation.
4. Current Mode Control: It utilizes peak current mode control for fast transient response and ease of loop compensation.
5. Integrated High-Side MOSFET: The device includes a 1.5A N-channel MOSFET, simplifying the design and reducing component count.
6. Switching Frequency: It features an adjustable switching frequency from 50 kHz to 500 kHz.
7. Protection Features: Includes cycle-by-cycle current limit, thermal shutdown, input under-voltage lockout, and output over-voltage protection for reliable operation.
8. Package: Available in a thermally enhanced 20-lead TSSOP package.
These features make the LM5575MH suitable for automotive, industrial, and general-purpose power supply applications.

Pinout

The LM5575MH is a step-down switching voltage regulator. It typically comes in a 20-pin TSSOP (Thin Shrink Small Outline Package) package with the following key functions:
1. SW (Switching Node): Connects to the inductor and is the point where the internal switch and external inductor meet.
2. BST (Bootstrap): Provides a drive voltage higher than the input voltage to the high-side FET.
3. VIN (Input Voltage): The input supply voltage pin.
4. VCC (Output of the Internal Voltage Regulator): Supplies power to internal circuitry.
5. FB (Feedback): Receives the output voltage through a resistive divider for regulation.
6. COMP (Compensation): Allows for the connection of compensation network to stabilize the control loop.
7. RT (Timing Resistor): Sets the switching frequency.
8. SYNC (Synchronization): Allows synchronization to an external clock.
9. SS (Soft-Start/Tracking): Controls the soft-start or tracking functions.
10. EN (Enable): Turns the regulator on or off.
11. PGOOD (Power Good): An open-drain output that signals when the output voltage is within regulation limits.
12. GND (Ground): Ground reference for the circuit.
For complete and specific pin functions, always refer to the manufacturer's datasheet.

Manufacturer

The LM5575MH is manufactured by Texas Instruments (TI), an American technology company. Texas Instruments is renowned for its development and production of semiconductors and various integrated circuits, which are widely used in electronics ranging from simple consumer devices to complex industrial systems. Established in 1930 and headquartered in Dallas, Texas, TI is one of the largest and most well-established companies in the semiconductor industry.
TI focuses on designing and manufacturing analog and embedded processing chips. Its products are essential for engineering applications across various sectors, including automotive, industrial, personal electronics, communications, and enterprise systems. The company is recognized for its innovation, reliability, and vast product portfolio, making it a key player in the global electronics market.

Application

The LM5575MH is a step-down switching voltage regulator designed for various power management applications. Key application areas include:
1. Industrial Power Supplies: Used in systems requiring reliable and efficient power conversion for industrial machinery and equipment.
2. Telecommunications: Powers communication infrastructure equipment, ensuring stable voltage supply.
3. Automotive Systems: Suitable for in-vehicle electronic systems where robust voltage regulation is necessary.
4. Consumer Electronics: Provides efficient power management in devices like set-top boxes and home appliances.
5. Distributed Power Systems: Utilized in networked systems to maintain voltage integrity across multiple nodes.
Its high-efficiency, wide input voltage range, and robust thermal performance make it versatile for diverse applications.

Package

The LM5575MH is a switching regulator integrated circuit from Texas Instruments, housed in a thermally enhanced, 20-terminal, TSSOP (Thin Shrink Small Outline Package) with PowerPAD. This package type helps in efficient heat dissipation, making it suitable for high-power applications.

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