TPS54310PWPRG4 Datasheet, PDF (1/21 Pages) Texas Instruments – 3-V TO 6-V INPUT, 3-A OUTPUT SYNCHRONOUS-BUCK PWM SWITCHER WITH INTEGRATED FETs (SWIFT™)

Typical Size
(6,3 mm x 6,4 mm)
TPS54310
www.ti.com
SLVS412D – DECEMBER 2001 – REVISED FEBRUARY 2007
3-V TO 6-V INPUT, 3-A OUTPUT SYNCHRONOUS-BUCK PWM
SWITCHER WITH INTEGRATED FETs (SWIFT™)
FEATURES
• 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
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
TPS54310
BOOT
PGND
VBIAS ^VSENSE
AGND COMP
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 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.
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
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, PowerPAD are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2001–2007, Texas Instruments Incorporated