1 Features

1• Internal 5-A, 24-V Low-Side MOSFET Switch

• 2.9-V to 16-V Input Voltage Range

• ±0.7% Reference Voltage

• 0.5-mA Operating Quiescent Current

• 2.7-μA Shutdown Supply Current

• Fixed-Frequency-Current-Mode PWM Control

• Frequency Adjustable From 100 kHz to 1.2 MHz

• Synchronization Capability to External Clock

• Adjustable Soft-Start Time

• Pulse-Skipping for Higher Efficiency at Light

Loads

• Cycle-by-Cycle Current Limit, Thermal Shutdown,

and UVLO Protection

• QFN-16 (3 mm × 3 mm) With PowerPAD™

• Wide –40°C to +150°C Operating TJ Range

• Create a Custom Design Using the TPS55330

With the WEBENCH® Power Designer

2 Applications

• 3.3-V, 5-V, 12-V Power Conversion

• Boost, SEPIC, and Flyback Topologies

• Thunderbolt Port, Power Docking for Tablets and

Portable PCs

• Industrial Power Systems

• ADSL Modems

3 Description

The TPS55330 is a monolithic nonsynchronous

switching regulator with integrated 5-A, 24-V power

switch. The device can be configured in several

standard switching-regulator topologies, including

boost, SEPIC, and isolated flyback. The device has a

wide input voltage range to support applications with

input voltage from multicell batteries or regulated 3.3-

V, 5-V, and 12-V power rails.

The TPS55330 regulates the output voltage with

current mode PWM (pulse width modulation) control,

and has an internal oscillator. The switching

frequency of PWM is set by either an external resistor

or by synchronizing to an external clock signal. The

user can program the switching frequency from

100 kHz to 1.2 MHz.

The device features a programmable soft-start

function to limit inrush current during start up and has

other built-in protection features including cycle-bycycle

overcurrent limit and thermal shutdown.

The TPS55330 is available in a small 3-mm × 3-mm

16-pin QFN with PowerPAD for enhanced thermal

performance.