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.