TPS54110_16 Datasheet, PDF (1/30 Pages) Texas Instruments – 3-V TO 6-V Input, 1.5-A Output Synchronous-Buck PWM Switcher with Integrated FETs

Typical Size
(6,3 mm x 6,4 mm)
TPS54110
www.ti.com
SLVS500C – DECEMBER 2003 – REVISED FEBRUARY 2011
3-V TO 6-V Input, 1.5-A Output Synchronous-Buck PWM
Switcher with Integrated FETs ( SWIFT™)
Check for Samples: TPS54110
FEATURES
1
•2 Integrated MOSFET Switches for High
Efficiency at 1.5-A Continuous Output Source
or Sink Current
• 0.9-V to 3.3-V Adjustable Output Voltage 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
DESCRIPTION
As members of the SWIFT family of dc/dc regulators,
the TPS54110 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 TPS54110 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.
Input
10 µF
0.1 µF
Simplified Schematic
VIN
PH
TPS54110
BOOT
6.8 µH
0.047 µF 100 µF
PGND
Output
COMP
VBIAS
VSENSE
AGND
33 pF
19.1 kΩ
3.92 kΩ
2700 pF
3.92 kΩ
2.05 kΩ
2200 pF
Compensation
Network
100
95
90
85
80
75
70
65
60
55
50
0
EFFICIENCY
vs
OUTPUT CURRENT
0.25 0.5 0.75 1 1.25. 1.5
I_O- Output Current - A
1
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.
2
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.
© 2003–2011, Texas Instruments Incorporated