MAX5987AETE+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Sourcing Equipment (PSE) Controller
• Characteristics: High efficiency, compact size, advanced power management features
• Package: 16-pin TQFN (Thin Quad Flat No-Lead)
• Essence: Provides power and control functions for Power over Ethernet (PoE) systems
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 36V to 57V
• Output Voltage Range: 3.15V to 57V
• Maximum Output Current: 650mA
• Operating Temperature Range: -40°C to +85°C
• Power Dissipation: 1.5W
• Switching Frequency: 200kHz to 400kHz
• Protection Features: Overcurrent, Overvoltage, Undervoltage, Thermal Shutdown

Pin Configuration

The MAX5987AETE+T has a total of 16 pins arranged as follows:

1. VDD: Power Supply Input
2. GND: Ground
3. VEE: Negative Power Supply Input
4. VREF: Reference Voltage Output
5. FB: Feedback Input
6. EN: Enable Input
7. PGOOD: Power Good Output
8. INTVCC: Internal Voltage Regulator Output
9. VOUT: Output Voltage
10. VOUT: Output Voltage
11. VOUT: Output Voltage
12. VOUT: Output Voltage
13. VOUT: Output Voltage
14. VOUT: Output Voltage
15. VOUT: Output Voltage
16. VOUT: Output Voltage

Functional Features

• Supports IEEE 802.3af/at compliant PoE systems
• Integrated high-efficiency DC-DC converter
• Advanced power management features for improved system reliability
• Provides accurate current limit and thermal shutdown protection
• Enables power monitoring through the PGOOD output signal

Advantages and Disadvantages

Advantages

• High efficiency design reduces power dissipation and improves energy efficiency
• Compact size allows for space-saving integration in PoE systems
• Comprehensive protection features enhance system reliability
• Simplifies power management in PoE applications

Disadvantages

• Limited maximum output current of 650mA may not be suitable for high-power devices
• Requires external components for complete PoE system implementation

Working Principles

The MAX5987AETE+T is a Power Sourcing Equipment (PSE) controller designed for Power over Ethernet (PoE) systems. It integrates a high-efficiency DC-DC converter that efficiently converts the input voltage to the desired output voltage. The device supports IEEE 802.3af/at compliant PoE systems, providing power and control functions.

The IC incorporates advanced power management features such as accurate current limit and thermal shutdown protection. These features ensure safe operation and protect against overcurrent, overvoltage, undervoltage, and excessive temperature conditions.

The MAX5987AETE+T also includes an enable input (EN) and a power good output (PGOOD). The EN pin allows for easy control of the device's power supply, while the PGOOD pin provides a signal indicating the status of the power supply.

Detailed Application Field Plans

The MAX5987AETE+T is widely used in various PoE applications, including:

1. IP Cameras: Provides power and control functions for network cameras, eliminating the need for separate power cables.
2. Wireless Access Points: Enables power delivery to wireless access points, simplifying installation and reducing cable clutter.
3. VoIP Phones: Integrates power and control capabilities into Voice over IP (VoIP) phones, enabling single-cable connectivity.
4. Network Switches: Facilitates power delivery to network switches, allowing for flexible deployment in remote locations.

Detailed and Complete Alternative Models

1. MAX5969AETE+T: Similar PSE controller with higher maximum output current of 800mA.
2. MAX5970AETE+T: PSE controller with integrated DC-DC converter and higher maximum output current of 1.5A.
3. MAX5988AETE+T: PSE controller with advanced power management features and adjustable output voltage range.

These alternative models offer different specifications and features, providing flexibility for various PoE system requirements.

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