LM25118Q1MHE/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High efficiency - Wide input voltage range - Low quiescent current - Adjustable output voltage - Overcurrent protection - Thermal shutdown protection

Package: QFN (Quad Flat No-leads)

Essence: The LM25118Q1MHE/NOPB is a high-efficiency step-down DC-DC converter designed for automotive applications.

Packaging/Quantity: The LM25118Q1MHE/NOPB is available in a 20-pin QFN package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 4.5V to 42V
• Output Voltage Range: 0.8V to VIN
• Maximum Output Current: 3A
• Switching Frequency: 2.1MHz
• Quiescent Current: 40µA
• Operating Temperature Range: -40°C to +125°C

Pin Configuration

The LM25118Q1MHE/NOPB has the following pin configuration:

1. VIN: Input voltage
2. PGND: Power ground
3. SW: Switch node connection
4. FB: Feedback voltage input
5. EN: Enable control input
6. SS/TR: Soft-start/tracking input
7. AGND: Analog ground
8. VCC: Supply voltage for internal circuitry
9. COMP: Compensation node
10. SS/TR: Soft-start/tracking input
11. BST: Bootstrap capacitor connection
12. PGND: Power ground
13. PGND: Power ground
14. PGND: Power ground
15. PGND: Power ground
16. PGND: Power ground
17. PGND: Power ground
18. VCC: Supply voltage for internal circuitry
19. SW: Switch node connection
20. VIN: Input voltage

Functional Features

• High efficiency conversion
• Adjustable output voltage
• Overcurrent protection
• Thermal shutdown protection
• Soft-start and tracking capability
• Wide input voltage range
• Integrated compensation network

Advantages

• High efficiency leads to reduced power dissipation and improved battery life.
• Wide input voltage range allows for compatibility with various power sources.
• Adjustable output voltage provides flexibility in different applications.
• Overcurrent and thermal shutdown protection enhance system reliability.
• Soft-start and tracking capability minimize inrush current and voltage fluctuations.

Disadvantages

• Limited maximum output current of 3A may not be suitable for high-power applications.
• The QFN package may require specialized equipment for soldering and rework.

Working Principles

The LM25118Q1MHE/NOPB is a step-down DC-DC converter that uses a synchronous buck topology. It operates by rapidly switching the input voltage across an inductor and then filtering it to produce a lower output voltage. The integrated control circuitry ensures efficient power conversion while providing protection features such as overcurrent and thermal shutdown.

Application Field Plans

The LM25118Q1MHE/NOPB is designed for automotive applications, including but not limited to: - Infotainment systems - Advanced driver-assistance systems (ADAS) - Lighting systems - Powertrain control modules - Battery management systems

Alternative Models

• LM25117Q1MHE/NOPB: Similar specifications and features, but with a lower maximum output current of 2A.
• LM25119Q1MHE/NOPB: Similar specifications and features, but with a higher maximum output current of 4A.
• LM25116Q1MHE/NOPB: Similar specifications and features, but with a lower switching frequency of 1.2MHz.

These alternative models provide options for different power requirements and design considerations.

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