TPS54310_15 Datasheet, PDF (1/28 Pages) Texas Instruments – 3-V to 6-V Input, 3-A Output Synchronous-Buck PWM Switcher With Integrated FETs (SWIFT™)

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TPS54310
SLVS412E – DECEMBER 2001 – REVISED DECEMBER 2014
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 or Sink Current
• Adjustable Output Voltage Down to 0.9 V With 1%
Accuracy
• Externally Compensated for Design Flexibility
• 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
3 Description
As members of the SWIFT™ family of dc/dc
regulators, the TPS54310 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
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 power good output useful for
processor/logic reset, fault signaling, and supply
sequencing.
The TPS54310 device is 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
BODY SIZE (NOM)
TPS54310
HTSSOP
PowerPAD (20)
6.30 mm × 6.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Input
Simplified Schematic
VIN
PH
TPS54310
BOOT
PGND
VBIAS ^VSENSE
AGND COMP
Output
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.