FEATURES

· 40 mW MOSFET Switch for High Efficiency at

6-A (7.5 Peak) Output Current

· Uses External Lowside MOSFET

· Output Voltage Adjustable Down to 0.891 V

With 1% Accuracy

· Synchronizes to External Clock

· 180° Out of Phase Synchronization

· Wide PWM Frequency—Fixed 250 kHz,

500 kHz or Adjustable 250 kHz to 700 kHz

· Adjustable Slow Start

· Adjustable Undervoltage Lockout

· Load Protected by Peak Current Limit and

Thermal Shutdown

· 16-Pin TSSOP PowerPAD™ Package

· SWIFT Documentation Application Notes, and

Design Software: www.ti.com/swift

APPLICATIONS

· Industrial and Commercial Low Power

Systems

· LCD Monitors and TVs

· Computer Peripherals

· Point of Load Regulation for

High-Performance DSPs, FPGAs, ASICs and

Microprocessors

DESCRIPTION

The TPS54550 is a medium output current

synchronous buck PWM converter with an integrated

high-side MOSFET and a gate driver for an low-side

external MOSFET. Features include a high-performance voltage error amplifier that enables

maximum performance under transient conditions

and flexibility in choosing the output filter inductors

and capacitors. The TPS54550 has an undervoltage

lockout circuit to prevent start-up until the input voltage reaches 4.5 V; a slow-start circuit to limit

in-rush currents; and a power good output to indicate

valid output conditions. The synchronization feature

is configurable as either an input or an output for

easy 180° out of phase synchronization.

The TPS54550 device is available in a

thermally-enhanced 16-pin TSSOP (PWP) PowerPAD™ package. TI provides evaluation

modules and the SWIFT™ Designer software tool to

aid in quickly achieving high-performance power

supply designs to meet aggressive equipment

development cycles.