1 Features

• 3.5-V to 28-V input voltage range

• Adjustable output voltage down to 0.8 V

• Integrated 80-mΩ high-side MOSFET supports up

to 3.5-A continuous output current

• High-efficiency at light loads with a pulse-skipping

Eco-mode

• Fixed 1-MHz switching frequency

• Typical 1-μA shutdown quiescent current

• Adjustable slow-start limits inrush currents

• Programmable UVLO threshold

• Overvoltage transient protection

• Cycle-by-cycle current limit, frequency foldback

and thermal shutdown protection

• Available in thermally enhanced, 8-pin SOIC

PowerPAD™ integrated circuit package

• Use TPS62933 for a 30 VIN converter with higher

frequency, lower IQ, and improved EMI

• Create a custom design using the TPS54332 with

the WEBENCH® Power Designer

2 Applications

• Consumer applications such as set-top boxes,

CPE equipment, LCD displays, peripherals, and

battery chargers

• Industrial and car audio power supplies

• 5-V, 12-V and 24-V distributed power systems

3 Description

The TPS54332 is a 28-V, 3.5-A non-synchronous

buck converter that integrates a low-RDS(on) highside

MOSFET. To increase efficiency at light loads,

a pulse-skipping Eco-mode feature is automatically

activated. Furthermore, the 1-μA shutdown supply

current allows the device to be used in batterypowered

applications. Current mode control with

internal slope compensation simplifies the external

compensation calculations and reduces component

count while allowing the use of ceramic output

capacitors. A resistor divider programs the hysteresis

of the input undervoltage lockout. An overvoltage

transient protection circuit limits voltage overshoots

during start-up and transient conditions. A cycle-bycycle

current limit scheme, frequency foldback and

thermal shutdown protect the device and the load in

the event of an overload condition. The TPS54332

is available in an 8-pin SOIC PowerPAD integrated

circuit package.