DocumentationDatasheet
Reliability Data
- PoE Consortium Clause # 33 PD Conformance Report
- PoE Consortium Interoperability Report - LTC4267
- R413 Reliability Data
Product Selector Card
cad_symbol
Features
- Complete Power Interface Port for IEEE 802®.3af Powered Device (PD)
- Onboard 100V, UVLO Switch
- Precision Dual Level Inrush Current Limit
- Integrated Current Mode Switching Regulator
- Onboard 25k Signature Resistor with Disable
- Programmable Classification Current (Class 0-4)
- Thermal Overload Protection
- Power Good Signal
- Integrated Error Amplifier and Voltage Reference
- Low Profile 16-Pin SSOP Package
Typical Application
Description
The LTC4267-1 combines an IEEE 802.3af compliant Powered Device (PD) interface with a current mode switching regulator, providing a complete power solution for PD applications. The LTC4267-1 integrates the 25k signature resistor, classification current source, thermal overload protection, signature disable and power good signal along with an undervoltage lockout optimized for use with the IEEE-required diode bridge. The LTC4267-1 provides an increased operational current limit, maximizing power available for class 3 applications.
The current mode switching regulator is designed for driving a 6V rated N-channel MOSFET and features programmable slope compensation, soft-start, and constant frequency operation, minimizing noise even with light loads. The LTC4267-1 includes an onboard error amplifier and voltage reference allowing use in both isolated and nonisolated configurations.
The LTC4267-1 is available in a space saving, low profile 16-pin SSOP package.
SSOP-16
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) |
Price (1k)* |
|---|---|---|---|---|---|
| LTC4267CDHC#PBF | DFN | 16 | C | $2.92 | $2.20 |
| LTC4267CDHC#TRPBF | DFN | 16 | C | $2.30 | |
| LTC4267CDHC-3#PBF | DFN | 16 | C | $2.92 | $2.20 |
| LTC4267CDHC-3#TRPBF | DFN | 16 | C | $2.30 | |
| LTC4267CGN#PBF | SSOP | 16 | C | $2.75 | $2.10 |
| LTC4267CGN#TRPBF | SSOP | 16 | C | $2.16 | |
| LTC4267CGN-1#PBF | SSOP | 16 | C | $2.75 | $2.10 |
| LTC4267CGN-1#TRPBF | SSOP | 16 | C | $2.16 | |
| LTC4267CGN-3#PBF | SSOP | 16 | C | $2.75 | $2.10 |
| LTC4267CGN-3#TRPBF | SSOP | 16 | C | $2.16 | |
| LTC4267IDHC#PBF | DFN | 16 | I | $3.50 | $2.65 |
| LTC4267IDHC#TRPBF | DFN | 16 | I | $2.75 | |
| LTC4267IDHC-3#PBF | DFN | 16 | I | $3.50 | $2.65 |
| LTC4267IDHC-3#TRPBF | DFN | 16 | I | $2.75 | |
| LTC4267IGN#PBF | SSOP | 16 | I | $3.33 | $2.55 |
| LTC4267IGN#TRPBF | SSOP | 16 | I | $2.61 | |
| LTC4267IGN-1#PBF | SSOP | 16 | I | $3.33 | $2.55 |
| LTC4267IGN-1#TRPBF | SSOP | 16 | I | $2.61 | |
| LTC4267IGN-3#PBF | SSOP | 16 | I | $3.33 | $2.55 |
| LTC4267IGN-3#TRPBF | SSOP | 16 | I | $2.61 | |
| LTC4267CDHC | DFN | 16 | C | $5.84 | $4.40 |
| LTC4267CDHC#TR | DFN | 16 | C | $4.60 | |
| LTC4267CGN | SSOP | 16 | C | $5.50 | $4.20 |
| LTC4267CGN#TR | SSOP | 16 | C | $4.32 | |
| LTC4267IDHC | DFN | 16 | I | $7.00 | $5.30 |
| LTC4267IDHC#TR | DFN | 16 | I | $5.50 | |
| LTC4267IGN | SSOP | 16 | I | $6.66 | $5.10 |
| LTC4267IGN#TR | SSOP | 16 | I | $5.22 | |
| LTC4267CGN-3 | SSOP | 16 | C | $5.50 | $4.20 |
| LTC4267IGN-3 | SSOP | 16 | I | $6.66 | $5.10 |
| LTC4267CGN-3#TR | SSOP | 16 | C | $4.32 | |
| LTC4267IGN-3#TR | SSOP | 16 | I | $5.22 | |
| LTC4267CDHC-3 | DFN | 16 | C | $5.84 | $4.40 |
| LTC4267CDHC-3#TR | DFN | 16 | C | $4.60 | |
| LTC4267IDHC-3 | DFN | 16 | I | $7.00 | $5.30 |
| LTC4267IDHC-3#TR | DFN | 16 | I | $5.50 |
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.