TPS54311_15 Datasheet, PDF (1/27 Pages) Texas Instruments – TPS5431x 3-V to 6-V Input, 3-A Output Synchronous Buck PWM Switcher With Integrated FETs (SWIFT™)

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TPS54311, TPS54312, TPS54313
TPS54314, TPS54315, TPS54316
SLVS416C – FEBRUARY 2002 – REVISED JANUARY 2015
TPS5431x 3-V to 6-V Input, 3-A Output Synchronous Buck PWM Switcher With Integrated
FETs (SWIFT™)
1 Features
•1 60-mΩ, MOSFET Switches for High Efficiency at
3-A Continuous Output Source and 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 1.0% Initial Accuracy
• Internally Compensated for Low Parts 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
2 Applications
• Low-Voltage, High-Density Systems With 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
Input
Simplified Schematic
VIN
PH
TPS54316
BOOT
PGND
VBIAS
VSENSE
GND
Output
3 Description
As members of the SWIFT™ family of DC - DC
regulators, the TPS54311, TPS54312, TPS54313,
TPS54314, TPS54315 and TPS54316 low-input-
voltage high-outputcurrent 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 high performance 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 powergood output useful for
processor/logic reset, fault signaling, and supply
sequencing.
The TPS54311, TPS54312, TPS54313, TPS54314,
TPS54315 and TPS54316 devices are available in a
thermally enhanced 20-pin HTSSOP (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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE OUTPUT VOLTAGE
TPS54311
0.9 V
TPS54312
1.2 V
TPS54313
TPS54314
HTSSOP (20)
1.5 V
1.8 V
TPS54315
2.5 V
TPS54316
3.3 V
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Efficiency vs Load Current
96
94
92
90
88
86
84
T_A = 25°C
82 VI = 5 V
V_O = 3.3 V
80
0 0.5 1 1.5 2 2.5 3
Load Current − A
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.