Linear Technology LTC4278IDKD#PBF

Description
IEEE 802.3at PD controller and switching regulator for high-power applications
Wide input voltage range (10V to 57V)
Supports PD applications with 12V auxiliary power input
Shutdown pin for flexible auxiliary power support
Integrated synchronous flyback controller with No-Opto feedback topology
High efficiency (over 92%)
Superior EMI performance
Robust 100V, 0.72Ω integrated Hot Swap MOSFET
IEEE 802.3at high power available indicator
Integrated signature resistor and programmable class current
Undervoltage, overvoltage, and thermal protection
Short-circuit protection with auto-restart
Programmable soft-start and switching frequency
Complementary power good indicators
Thermally enhanced 7mm x 4mm DFN package

Features
IEEE 802.3at compliant (Type 2)
25.5W power delivery
10V to 57V auxiliary power input
Shutdown pin for auxiliary power dominance
No-Opto flyback controller
High efficiency (over 92%)
Superior EMI performance
Robust 100V Hot Swap MOSFET
IEEE 802.3at high power available indicator
Programmable class current
Undervoltage, overvoltage, and thermal protection
Short-circuit protection with auto-restart
Programmable soft-start and switching frequency
Complementary power good indicators
Thermally enhanced DFN package

Applications
VoIP phones with advanced display options
Dual-radio wireless access points
PTZ security cameras
RFID readers
Industrial controls