1 Features
• Undervoltage lockout options to support both Si
and SiC MOSFET applications
• 30-V VDD absolute maximum voltage
• 1-MHz maximum fixed frequency operation
• 50-μA startup current, 75-μA maximum
• Low operating current: 1.3 mA (at fOSC = 52 kHz)
• Fast 35-ns, cycle-by-cycle overcurrent limiting
• ±1-A peak driving current
• Rail-to-rail output
– 25-ns rise time
– 20-ns fall time
• ±1% accurate 2.5-V error amplifier reference
• Pin-to-pin compatible and drop-in replacement for
UCCx8C4x
• Functional Safety-Capable
– Documentation available to aid functional safety
system design

2 Applications
• General purpose single-ended DC-DC or off-line
isolated power converters
• Auxiliary power supply for solar power inverters,
motor drives, energy storage systems
• Isolated power supply for EV charging stations

3 Description
The UCCx8C5x family of devices are highperformance
current-mode PWM controllers that
can drive both Si and SiC MOSFETs in various
applications. The UCCx8C5x family is a more efficient
and robust version of the UCCx8C4x.
The UCCx8C5x family has new UVLO thresholds
that allow for reliable SiC MOSFET operation
(UCC28C56-59), in addition to existing UVLO
thresholds for continued Si MOSFET support
(UCCx8C50-55).
VDD absolute maximum voltage rating is extended
from 20 V to 30 V for optimally driving the gate of
20-Vgs, 18-Vgs, or 15-Vgs SiC MOSFETs, while also
allowing for the exclusion of an external LDO.