1 Features
• High efficiency at light loads with pulse skipping
Eco-mode™
• 87-mΩ high-side MOSFET
• 152-μA operating quiescent current and
2-μA shutdown current
• 100-kHz to 2.5-MHz adjustable switching
frequency
• Synchronizes to external clock
• Low dropout at light loads with integrated BOOT
recharge FET
• Adjustable UVLO voltage and hysteresis
• UV and OV power-good output
• Adjustable soft start and sequencing
• 0.8-V 1% internal voltage reference
• 10-pin WSON with thermal pad package
• –40°C to 150°C TJ operating range
• Create a custom design using the TPS54561 with
the WEBENCH® Power Designer

2 Applications
• Industrial automation and motor control
• Vehicle accessories: GPS (see SLVA412),
entertainment
• USB dedicated charging ports and battery
chargers (see SLVA464)
• 12-V, 24-V, and 48-V industrial, automotive, and
communications power systems

3 Description
The TPS54561 is a 60-V, 5-A, step down regulator
with an integrated high side MOSFET. The device
survives load dump pulses up to 65V per ISO
7637. Current mode control provides simple external
compensation and flexible component selection. A
low ripple pulse skip mode reduces the no load
supply current to 152 μA. Shutdown supply current
is reduced to 2 μA when the enable pin is pulled low.
Undervoltage lockout is internally set at 4.3 V but
can increase using an external resistor divider at
the enable pin. The output voltage start up ramp
is controlled by the soft start pin that can also be
configured for sequencing/tracking. An open drain
power good signal indicates the output is within 93%
to 106% of its nominal voltage.
A wide adjustable switching-frequency range allows
for optimization of either efficiency or external
component size. Cycle-by-cycle current limit,
frequency foldback and thermal shutdown protects
internal and external components during an overload
condition.
The TPS54561 is available in an 10-pin 4-mm × 4-mm
WSON package.