Datasheet Linear Technology LTC4267CDHC-3#PBF — 数据表

LTC4267-3
Power over Ethernet
IEEE 802.3af PD Interface with
Integrated Switching Regulator
Description Features Complete Power Interface Port for IEEE 802В®.3af
Powered Device (PD)
nn Onboard 100V, UVLO Switch
nn Constant-Frequency 300kHz Operation
nn Precision Dual Level Inrush Current Limit
nn Integrated Current Mode Switching Regulator
nn Onboard 25k Signature Resistor with Disable
nn Programmable Classification Current (Class 0-4)
nn Thermal Overload Protection
nn Power Good Signal
nn Integrated Error Amplifier and Voltage Reference
nn Low Profile 16-Pin SSOP or DFN Packages The LTCВ®4267-3 combines an IEEE 802.3af compliant
Powered Device (PD) interface with a 300kHz current mode
switching regulator, providing a complete power solution
for PD applications. The LTC4267-3 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 LTC4267-3 …