Inquiries about the difference between the LTC4267, LTC4267-1 & LTC4267-3 PoE Controllers from ADI is a common question.
Verified by manufacturer, the LTC4267 and LTC4267-1 operate at 200kHz switching frequency, while the LTC4267-3 operates at 300kHz. The LTC4267-3 and LTC4267-1 have slightly higher internal hotswap current limits than the LTC4267. I and C, as in IGN and CGN, are different temperature grades.
Applicable part numbers
| LTC4267CDHC#PBF-ND | LTC4267CDHC#PBF |
|---|---|
| 505-LTC4267CDHC#TRPBFTR-ND,505-LTC4267CDHC#TRPBFCT-ND,505-LTC4267CDHC#TRPBFDKR-ND | LTC4267CDHC#TRPBF |
| 505-LTC4267CDHC-3#PBF-ND | LTC4267CDHC-3#PBF |
| LTC4267CDHC-3#TRPBF-ND | LTC4267CDHC-3#TRPBF |
| LTC4267CGN#PBF-ND | LTC4267CGN#PBF |
| LTC4267CGN#TRPBFTR-ND,LTC4267CGN#TRPBFCT-ND,LTC4267CGN#TRPBFDKR-ND | LTC4267CGN#TRPBF |
| LTC4267CGN-1#PBF-ND | LTC4267CGN-1#PBF |
| 505-LTC4267CGN-1#TRPBFTR-ND,505-LTC4267CGN-1#TRPBFCT-ND,505-LTC4267CGN-1#TRPBFDKR-ND | LTC4267CGN-1#TRPBF |
| LTC4267CGN-3#PBF-ND | LTC4267CGN-3#PBF |
| 505-LTC4267CGN-3#TRPBFTR-ND,505-LTC4267CGN-3#TRPBFCT-ND,505-LTC4267CGN-3#TRPBFDKR-ND | LTC4267CGN-3#TRPBF |
| 505-LTC4267IDHC#PBF-ND | LTC4267IDHC#PBF |
| 505-LTC4267IDHC#TRPBFTR-ND,505-LTC4267IDHC#TRPBFCT-ND,505-LTC4267IDHC#TRPBFDKR-ND | LTC4267IDHC#TRPBF |
| LTC4267IDHC-3#PBF-ND | LTC4267IDHC-3#PBF |
| 505-LTC4267IDHC-3#TRPBFTR-ND,505-LTC4267IDHC-3#TRPBFCT-ND,505-LTC4267IDHC-3#TRPBFDKR-ND | LTC4267IDHC-3#TRPBF |
| LTC4267IGN#PBF-ND | LTC4267IGN#PBF |
| 505-LTC4267IGN#TRPBFTR-ND,505-LTC4267IGN#TRPBFCT-ND,505-LTC4267IGN#TRPBFDKR-ND | LTC4267IGN#TRPBF |
| 505-LTC4267IGN-1#PBF-ND | LTC4267IGN-1#PBF |
| 505-LTC4267IGN-1#TRPBFTR-ND,505-LTC4267IGN-1#TRPBFCT-ND,505-LTC4267IGN-1#TRPBFDKR-ND | LTC4267IGN-1#TRPBF |
| 505-LTC4267IGN-3#PBF-ND | LTC4267IGN-3#PBF |
| 505-LTC4267IGN-3#TRPBFTR-ND,505-LTC4267IGN-3#TRPBFCT-ND,505-LTC4267IGN-3#TRPBFDKR-ND | LTC4267IGN-3#TRPBF |