FEATURES APPLICATIONS
DESCRIPTION
SIMPLIFIED SCHEMATIC
VIN
NC
NC
ENA
GND
VSENSE
BOOT
PH
TPS5430
VIN VOUT
50
55
60
65
70
75
80
85
90
95
100
0 0.5 1 1.5 2 2.5 3 3.5
Efficiency − %
I
O
− Output Current − A
V = 12 V,
V = 5 V,
fs = 500 kHz
I
0
Efficiency vs Output Current
TPS5430
SLVS632 – JANUARY 2006
5.5-V to 36-V, 3-A STEP-DOWN SWIFT™ CONVERTER
• Consumer: Set-top Box, DVD, LCD Displays
• Wide Input Voltage Range: 5.5 V to 36 V
• Industrial and Car Audio Power Supplies
• Up to 3-A Continuous (4-A Peak) Output
• Battery Chargers, High Power LED Supply
Current
• 12V/24V Distributed Power Systems
• High Efficiency up to 95% Enabled by 110-m Ω
Integrated MOSFET Switch
• Wide Output Voltage Range: Adjustable Down
to 1.22 V with 1.5% Initial Accuracy
As a member of the SWIFT™ family of DC/DC
regulators, the TPS5430 is a high-output-current
• Internal Compensation Minimizes External
PWM converter that integrates a low resistance high
Parts Count
side N-channel MOSFET. Included on the substrate
• Fixed 500 kHz Switching Frequency for Small
with the listed features are a high performance
Filter Size
voltage error amplifier that provides tight voltage
regulation accuracy under transient conditions; an
• Improved Line Regulation and Transient
under-voltage-lockout circuit to prevent start-up until
Response by Input Voltage Feed Forward
the input voltage reaches 5.5V; an internally set
• System Protected by Over Current Limiting
slow-start circuit to limit inrush currents; and a voltage
and Thermal Shutdown
feed-forward circuit to improve the transient
• –40 ° C to 125 ° C Operating Junction
response. Other features include an active high
Temperature Range
enable, over current protection and thermal
shutdown. To reduce design complexity and external
• Available in Small Thermally Enhanced 8-Pin
component count, the TPS5430 feedback loop is
SOIC PowerPAD™ Package
internally compensated.
• For SWIFT Documentation, Application Notes
The TPS5430 device is available in a thermally
and Design Software, See the TI Website at
enhanced, easy to use 8-pin SOIC PowerPAD™
www.ti.com/swift
package. 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.
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.
Copyright © 2006, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
