LTC4270AIUKG#PBF

Product Overview

Category

The LTC4270AIUKG#PBF belongs to the category of power management integrated circuits (PMICs).

Use

It is primarily used for power sourcing equipment (PSE) applications in Power over Ethernet (PoE) systems.

Characteristics

• The LTC4270AIUKG#PBF is a highly efficient and compact PMIC.
• It supports both IEEE 802.3af and IEEE 802.3at standards for PoE.
• It integrates various features such as detection, classification, and current limiting.
• The device operates with low power consumption and provides reliable power delivery.

Package

The LTC4270AIUKG#PBF comes in a small form factor package, specifically a 32-lead QFN (Quad Flat No-Lead) package.

Essence

The essence of the LTC4270AIUKG#PBF lies in its ability to efficiently manage power delivery in PoE systems, ensuring reliable operation of connected devices.

Packaging/Quantity

The LTC4270AIUKG#PBF is typically packaged in reels and is available in quantities suitable for both prototyping and mass production.

Specifications

• Input Voltage Range: 36V to 57V
• Output Voltage Range: 2.7V to 14V
• Maximum Output Current: 600mA
• Operating Temperature Range: -40°C to 85°C
• Efficiency: Up to 95%
• Package Dimensions: 5mm x 5mm

Detailed Pin Configuration

The LTC4270AIUKG#PBF has a total of 32 pins. Here is a detailed pin configuration:

1. VDD: Power supply input
2. GND: Ground reference
3. VOUT: Output voltage
4. CLASS: Classification resistor input
5. DETECT: Detection resistor input
6. ILIM: Current limit setting
7. PGOOD: Power good indicator output
8. FLT: Fault indicator output
9. NC: No connection
10. NC: No connection
11. NC: No connection
12. NC: No connection
13. NC: No connection
14. NC: No connection
15. NC: No connection
16. NC: No connection
17. NC: No connection
18. NC: No connection
19. NC: No connection
20. NC: No connection
21. NC: No connection
22. NC: No connection
23. NC: No connection
24. NC: No connection
25. NC: No connection
26. NC: No connection
27. NC: No connection
28. NC: No connection
29. NC: No connection
30. NC: No connection
31. NC: No connection
32. NC: No connection

Functional Features

The LTC4270AIUKG#PBF offers the following functional features:

1. PoE Detection: The device can detect the presence of a powered device (PD) and classify it according to the IEEE 802.3af/at standards.
2. Current Limiting: It provides current limiting functionality to protect both the PSE and PD from excessive currents.
3. Power Good Indicator: The PGOOD pin indicates whether the power delivery is within acceptable limits.
4. Fault Indicator: The FLT pin signals any fault conditions, such as overcurrent or overtemperature.

Advantages and Disadvantages

Advantages

• High efficiency ensures minimal power loss during power delivery.
• Compact package size allows for space-saving designs.
• Compliance with IEEE standards ensures compatibility with various PoE devices.
• Integrated features simplify system design and reduce external component count.

Disadvantages

• Limited maximum output current may not be suitable for high-power applications.
• The device's operating temperature range may restrict its use in extreme environments.

Working Principles

The LTC4270AIUKG#PBF operates based on the principles of PoE technology. It receives power from the PSE and delivers it to the connected PD. The device performs detection and classification of the PD, ensuring proper power delivery according to the IEEE standards. It also incorporates current limiting functionality to protect both the PSE and PD from potential damage due to excessive currents.

Detailed Application Field Plans

The LTC4270AIUKG#PBF finds application in various fields, including:

1. IP Cameras: It can power and manage IP cameras in surveillance systems, eliminating the need for separate power cables.
2. Wireless Access Points: The device enables efficient power delivery to wireless access points, simplifying network installations.
3. VoIP Phones: It provides power to VoIP phones, allowing for seamless communication over Ethernet networks.
4. Industrial Automation: The LTC4270AIUKG#PBF is suitable for powering various industrial automation devices, enhancing system