1FEATURES
2• Adaptive Shoot-through Protection
• 10ns Dead Time
• 8ns Propagation Delay
• 30ns Minimum On-time
• 0.4Ω Pull-down and 0.9Ω Pull-up Drivers
• 4.5A Peak Driving Current
• MOSFET Tolerant Design
• 5μA Quiescent Current
• 30V Maximum Input Voltage in Buck
Configuration
• 4V to 6.85V Operating Voltage
• SOIC-8 and WSON Packages

APPLICATIONS non•
High Current Buck And Boost Voltage
Converters
• Fast Transient DC/DC Power Supplies
• Single Ended Forward Output Rectification
• CPU And GPU Core Voltage Regulators

DESCRIPTION
The LM27222 is a dual N-channel MOSFET driver
designed to drive MOSFETs in push-pull
configurations as typically used in synchronous buck
regulators. The LM27222 takes the PWM output from
a controller and provides the proper timing and drive
levels to the power stage MOSFETs. Adaptive shoot- through protection prevents damaging and efficiency
reducing shoot-through currents, thus ensuring a
robust design capable of being used with nearly any
MOSFET. The adaptive shoot-through protection
circuitry also reduces the dead time down to as low
as 10ns, ensuring the highest operating efficiency.
The peak sourcing and sinking current for each driver
of the LM27222 is about 3A and 4.5Amps
respectively with a Vgs of 5V. System performance is
also enhanced by keeping propagation delays down
to 8ns. Efficiency is once again improved at all load
currents by supporting synchronous, non•
synchronous, and diode emulation modes through the
LEN pin. The minimum output pulse width realized at
the output of the MOSFETs is as low as 30ns. This enables high operating frequencies at very high
conversion ratios in buck regulator designs. To
support low power states in notebook systems, the
LM27222 draws only 5μA from the 5V rail when the
IN and LEN inputs are low or floating.