LM27402MH

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LM27402MH

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Switching Controllers

  • 製造商德州儀器

  • 製造商部分 #LM27402MH

  • 有存貨22062

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概述

Description

The LM27402MH is a synchronous buck controller from Texas Instruments, designed for step-down DC-DC conversion applications. It is particularly suitable for low-output voltage, high-current applications due to its ability to drive N-channel MOSFETs efficiently. The device supports input voltages ranging from 3.0V to 20V, making it versatile for various power supply designs.
Key features of the LM27402MH include a high-speed hysteretic control architecture for fast transient response, adjustable switching frequency (from 200 kHz to 1.2 MHz), and an integrated LDO for powering low-voltage devices. Additionally, it offers precision enable thresholds, programmable soft-start, and power-good indicators to ensure safe and reliable operation.
The controller also provides protection features such as current limiting, short-circuit protection, and thermal shutdown, enhancing system robustness. The LM27402MH is packaged in a thermally enhanced HTSSOP-16 package, facilitating compact designs with improved thermal management. These characteristics make it an ideal choice for use in computing, telecommunications, and networking equipment.

Equivalent

The LM27402MH is a high-performance, synchronous buck controller. Equivalent products might include:
1. TI TPS40322: Dual-output, synchronous buck controller.
2. ON Semiconductor NCP5422: Dual, synchronous buck controller.
3. Maxim Integrated MAX15046: Synchronous buck controller.
These alternatives have similar functionalities, but it's important to check their specifications and compatibility with your application before making a replacement.

Features

The LM27402MH is a synchronous buck regulator controller designed for step-down power conversion applications. Key features include:
1. Wide Input Voltage Range: Supports input voltages from 3V to 20V, making it versatile for various power supply systems.
2. Adjustable Output Voltage: Provides flexibility with an adjustable output voltage option, allowing customization for different applications.
3. High Efficiency: Designed for high-efficiency performance, crucial for reducing power loss and improving energy conservation in electronic devices.
4. Current Mode Control: Utilizes current mode control for improved transient response, stability, and easier loop compensation.
5. Synchronization Capability: Can be synchronized to an external clock, facilitating phase alignment in multi-phase power supply systems.
6. Programmable Switching Frequency: Offers a programmable switching frequency range, enabling optimization for efficiency and component size.
7. Integrated Soft Start: Features a soft-start function to prevent inrush current during startup, thereby protecting components and enhancing reliability.
8. Protection Features: Equipped with over-current protection and thermal shutdown to safeguard against operational anomalies.
These features make the LM27402MH suitable for powering processors, ASICs, and other digital circuits requiring high-performance power management solutions.

Pinout

The LM27402MH is a high-performance, synchronous buck controller. It typically comes in a 16-pin TSSOP (Thin Shrink Small Outline Package). The pin functions are as follows:
1. VIN: Power supply input.
2. VCC: Internal LDO output.
3. EN: Enable input.
4. SS: Soft-start pin.
5. FB: Feedback input.
6. COMP: Compensation.
7. PGOOD: Power Good output.
8. PGND: Power ground.
9. SW: Switch node.
10. ILIM: Current limit.
11. BOOT: Bootstrap capacitor connection.
12. UGATE: High-side gate drive.
13. LGATE: Low-side gate drive.
14. VDD: Input to internal LDO.
15. AGND: Analog ground.
16. RT: Frequency set resistor connection.
This controller is used to efficiently convert higher DC voltages to lower DC voltages in various electronic applications. It is particularly suitable for systems requiring high power density and efficiency.

Manufacturer

The LM27402MH is manufactured by Texas Instruments. Texas Instruments, often abbreviated as TI, is an American technology company that designs and manufactures semiconductors and various integrated circuits, which are used in electronic devices globally. TI is well-known for its contributions to the development of calculators, microprocessors, and other electronic components. The company serves a wide range of industries, including automotive, industrial, personal electronics, communications equipment, and enterprise systems.

Application

The LM27402MH is a synchronous buck regulator controller designed for applications requiring step-down voltage conversion. Its primary application areas include:
1. Telecommunications Equipment: Used for efficiently powering line cards and network infrastructure.
2. Data Centers: Provides stable power conversion in servers and storage systems.
3. Industrial Systems: Suitable for control systems, PLCs, and automation equipment.
4. Computing Devices: Powers CPUs and other high-performance computing components.
5. Consumer Electronics: Utilized in TVs, gaming consoles, and set-top boxes for efficient power management.
These areas benefit from its high efficiency, adjustable switching frequency, and precise voltage regulation capabilities.

Package

The LM27402MH is a buck regulator controller from Texas Instruments and is available in the HTSSOP (Thin Shrink Small Outline Package) package type. Specifically, it comes in a 20-pin HTSSOP package, which is designed for better thermal performance and reduced size, suitable for various power management applications.