TPS54311, TPS54312
TPS54313, TPS54314
TPS54315, TPS54316
Typical Size
6,60 mm X 2,20 mm
SLVS416 – FEBRUARY 2002
3-V TO 6-V INPUT, 3-A OUTPUT SYNCHRONOUS-BUCK PWM
SWITCHER WITH INTEGRATED FETs (SWIFT)
FEATURES
D
60-mΩ MOSFET Switches for High Efficiency
D
D
D
D
D
D
at 3-A Continuous Output Source or Sink
Current
0.9-V, 1.2-V, 1.5-V, 1.8-V, 2.5-V and 3.3-V Fixed
Output Voltage Devices With 1% Initial
Accuracy
Internally Compensated for Ease of Use and
Minimal Component Count
Fast Transient Response
Wide PWM Frequency—Fixed 350 kHz,
550 kHz or Adjustable 280 kHz to 700 kHz
Load Protected by Peak Current Limit and
Thermal Shutdown
Integrated Solution Reduces Board Area and
Total Cost
DESCRIPTION
As members of the SWIFT family of dc/dc regulators,
the TPS54311, TPS54312, TPS54313, TPS54314,
TPS54315 and TPS54316 low-input-voltage high-
output-current synchronous-buck PWM converters
integrate all required active components. Included on
the substrate with the listed features are a true, high
performance, voltage error amplifier that provides fast
response under transient conditions; an undervoltage-
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 TPS54311-6 devices are available in a thermally
enhanced 20-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.
EFFICIENCY
vs
LOAD CURRENT
100
APPLICATIONS
D
Low-Voltage, High-Density Systems With
D
D
D
Power Distributed at 5 V or 3.3 V
Point of Load Regulation for
High-Performance DSPs, FPGAs, ASICs, and
Microprocessors
Broadband, Networking, and Optical
Communications Infrastructure
Portable Computing/Notebook PCs
Simplified Schematic
Input
VIN
PH
BOOT
PGND
VBIAS
VSENSE
GND
Output
90
Efficiency – %
80
70
TPS54316
60
VI = 5 V
VO = 3.3 V
f = 350 kHz
0
0.5
1
1.5
2
2.5
3
3.5
50
Load Current – A
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.
SWIFT and PowerPAD are trademarks of Texas Instruments.
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.
Copyright
2002, Texas Instruments Incorporated
www.ti.com
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ETC [ ETC ]
