LTC4269-2
IEEE 802.3at High Power PD and Synchronous Forward Controller with AUX Support
Top
Overview
Features and Benefits
- 25.5W IEEE 802.3at Compliant (Type-2) PD
- PoE+ 2-Event Classification
- IEEE 802.3at High Power Available Indicator
- Integrated State-of-the-Art Synchronous Forward Controller – Isolated Power Supply Efficiency >94%
- Flexible Auxiliary Power Interface
- Superior EMI Performance
- Robust 100V 0.7Ω (Typ) Integrated Hot Swap™ MOSFET
- Integrated Signature Resistor, Programmable Class Current, UVLO, OVLO and Thermal Protection
- Short-Circuit Protection with Auto-Restart
- Programmable Switching Frequency from 100kHz to 500kHz
- Thermally Enhanced 7mm × 4mm DFN Package
Product Details
The LTC4269-2 is an integrated Powered Device (PD) interface and power supply controller featuring 2-event classification signaling, flexible auxiliary power options, and a power supply controller suitable for synchronously rectified forward supplies. These features make the LTC4269-2 ideally suited for an IEEE802.3at PD application.
The PD controller features a 100V MOSFET that isolates the power supply during detection and classification, and provides 100mA inrush current limit. Also included are power good outputs, an undervoltage/overvoltage lockout and thermal protection. The current mode forward controller allows for synchronous rectification, resulting in an extremely high efficiency, green product. Soft-start for controlled output voltage start-up and fault recovery is included. Programmable frequency over 100kHz to 500kHz allows flexibility in efficiency vs size and low EMI.
Applications
- IP Phones with Large Color Screens
- Dual Radio 802.11n Access Points
- PTZ Security Cameras
Product Categories
Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Documentation & Resources
-
R535 Reliability Data3/26/2018
-
DC1351B - Demo Manual1/23/2013
-
Power over Ethernet Solutions4/4/2017
-
PoE PD Controllers6/22/2015
-
PoE+ for the Power Hungry4/28/2010
-
Next Generation Power Over Ethernet6/22/2023
Tools & Simulations
LTspice
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Models for the following parts are available in LTspice:
LTC4269-1
LTC4269-2
Product Recommendations
LTC4269-2 Companion Parts
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC4269CDKD-2#PBF | Material Declaration | Reliability Data | 32-Lead DFN (7mm x 4mm w/ EP) | |
| LTC4269CDKD-2#TRPBF | Material Declaration | Reliability Data | 32-Lead DFN (7mm x 4mm w/ EP) | |
| LTC4269IDKD-2#PBF | Material Declaration | Reliability Data | 32-Lead DFN (7mm x 4mm w/ EP) | |
| LTC4269IDKD-2#TRPBF | Material Declaration | Reliability Data | 32-Lead DFN (7mm x 4mm w/ EP) | |
| Wafer Fabrication Data | R535 Reliability Data |
Sample & Buy
Ordering FAQs
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
A Sample link will be shown above, next to the part, only for parts that are included in our sample program. Selecting the Sample button will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.
Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.