TPS54910

3-V TO 4-V INPUT, 9-A OUTPUT SYNCHRONOUS BUCK PWM

SWITCHER WITH INTEGRATED FETs (SWIFT

™)

6,4 mm X 9,7 mm

Typical Size

SLVS421C − MARCH 2002 − REVISED FEBRUARY 2005

FEATURES

at 9-A Continuous Output

Fixed 350 kHz, 550 kHz or

Adjustable 280 kHz to 700 kHz

Thermal Shutdown

Total Cost

APPLICATIONS

Power Distributed at 3.3 V

Performance DSPs, FPGAs, ASICs and

Microprocessors

Communications Infrastructure

DESCRIPTION

As a member of the SWIFT™ family of dc/dc regulators,

the TPS54910 low-input voltage high-output current

synchronous buck PWM converter integrates all

required active components. Included on the substrate

with the listed features are a true, high performance,

voltage error amplifier that enables maximum

performance under transient conditions and flexibility in

choosing the output filter L and C components; an

under-voltage-lockout circuit to prevent start-up until

the input voltage reaches 3 V; an internally and

externally set slow-start circuit to limit in-rush currents;

and a power good output useful for processor/logic

reset, fault signaling, and supply sequencing.

The TPS54910 is available in a thermally enhanced

28-pin TSSOP (PWP) PowerPAD™ package, which

eliminates bulky heatsinks. 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.

SIMPLIFIED SCHEMATIC

50

55

60

65

70

75

80

85

90

95

100

EFFICIENCY AT 700 kHz

0123

45 6789 10 11 12

VIN

PH

BOOT

PGND

VSENSE

Output

AGND

VBIAS

Input

TPS54910

SIMPLIFIED SCHEMATIC

COMP

Compensation

Network

PRODUCTION DATA information is current as of publication date. Products

conform to specifications per the terms of Texas Instruments standard warranty.

Production processing does not necessarily include testing of all parameters.

PowerPAD and SWIFT are trademarks of Texas Instruments.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments

semiconductor products and disclaimers thereto appears at the end of this data sheet.

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Copyright © 2002 − 2005, Texas Instruments Incorporated