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.