1 Features
• Drives two N-channel MOSFETs in high-side lowside
configuration
• Enable/disable functionality in DRC package
• Low current (7-μA) consumption when disabled
• 16-ns typical propagation delay
• 12-ns rise, 10-ns fall time with 1800-pF load
(typical)
• 1-ns typical delay matching
• Integrated 100V bootstrap diode
• 8-V typical undervoltage lockout
• Absolute maximum negative voltage handling on
inputs (–5 V)
• Absolute maximum negative voltage handling on
HS (–14 V)
• ±3-A peak output current
• Absolute maximum boot voltage 120 V
• Inputs are independent of each other and VDD
• Under voltage lockout for both channels
• Specified from –40°C to 140°C junction
temperature

2 Applications
• Merchant network & server PSU
• Merchant telecom rectifiers
• DC input BLDC motor drive
• Solar micro inverters
• Test & measurement equipment

3 Description
The UCC27289 is a robust N-channel MOSFET driver
with a maximum switch node (HS) voltage rating
of 100 V. It allows for two N-channel MOSFETs
to be controlled in half-bridge or synchronous buck
configuration based topologies. Its 3-A peak source
and sink current along with low pull-up and pulldown
resistance allows the UCC27289 to drive large
power MOSFETs with minimum switching losses
during the transition of the MOSFET Miller plateau.
Since the inputs are independent of the supply
voltage, UCC27289 can be used in conjunction with
both analog and digital controllers. Two inputs are
completely independent of each other and thus two
outputs can be overlapped by overlapping inputs,
if needed. The enable and disable functionality
provides additional system flexibility by reducing
power consumption by the driver and responds to
fault events within the system.
The input pins as well as the HS pin are able to
tolerate significant negative voltage, which improves
system robustness. Small propagation delay and
delay matching specifications minimize the dead-time
requirement which improves system efficiency.
Under voltage lockout (UVLO) is provided for both
the high-side and low-side driver stages forcing
the outputs low if the VDD voltage is below the
specified threshold. An integrated bootstrap diode
eliminates the need for an external discrete diode
in many applications, which saves board space and
reduces system cost. UCC27289 is offered in multiple
packages to accommodate system requirements such
as robustness in harsh environments and density in
compact applications.