TPS5410-Q1 Datasheet, PDF (1/25 Pages) Texas Instruments – 1-A, WIDE INPUT RANGE, STEP-DOWN SWIFT™ CONVERTER

TPS5410-Q1
www.ti.com......................................................................................................................................................................................... SLVSA23 – SEPTEMBER 2009
1-A, WIDE INPUT RANGE, STEP-DOWN SWIFT™ CONVERTER
Check for Samples: TPS5410-Q1
FEATURES
1
•2 Qualified for Automotive Applications
• Wide Input Voltage Range: 5.5 V to 36 V
• Up to 1-A Continuous (1.2-A Peak) Output
Current
• High Efficiency up to 95% Enabled by 110-mΩ
Integrated MOSFET Switch
• Wide Output Voltage Range: Adjustable Down
to 1.22 V with 1.5% Initial Accuracy
• Internal Compensation Minimizes External
Parts Count
• Fixed 500-kHz Switching Frequency for Small
Filter Size
• Improved Line Regulation and Transient
Response by Input Voltage Feed Forward
• System Protected by Over Current Limiting,
Over Voltage Protection and Thermal
Shutdown
• –40°C to 125°C Operating Junction
Temperature Range
• Available in Small 8-Pin SOIC Package
• For SWIFT Documentation, Application Notes
and Design Software, See the TI Website at
www.ti.com/swift
APPLICATIONS
• Consumer: Set-top Box, DVD, LCD Displays
• Industrial and Car Audio Power Supplies
• Battery Chargers, High Power LED Supply
• 12-V/24-V Distributed Power Systems
DESCRIPTION
As a member of the SWIFT™ family of DC/DC
regulators, the TPS5410 is a high-output-current
PWM converter that integrates a low resistance high
side N-channel MOSFET. Included on the substrate
with the listed features is a high performance voltage
error amplifier that provides tight voltage regulation
accuracy under transient conditions; an
undervoltage-lockout circuit to prevent start-up until
the input voltage reaches 5.5 V; an internally set
slow-start circuit to limit inrush currents; and a voltage
feed-forward circuit to improve the transient
response. Using the ENA pin, shutdown supply
current is reduced to 18 μA typically. Other features
include an active high enable, overcurrent limiting,
overvoltage protection and thermal shutdown. To
reduce design complexity and external component
count, the TPS5410 feedback loop is internally
compensated.
The TPS5410 device is available in an easy to use
8-pin SOIC package. TI provides evaluation modules
and software tools to aid in quickly achieving
high-performance power supply designs to meet
aggressive equipment development cycles.
Simplified Schematic
VIN
VIN
PH
TPS5410
NC BOOT
NC
VOUT
Efficiency vs Output Current
100
95
90
ENA VSENSE
GND
85
V_I = 20 V
V_O = 12 V
80
f_s = 500 kHz
T_A = 25^oC
75
0 0.2 0.4 0.6 0.8 1 1.2 1.4
IO - 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 is a trademark 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.
Copyright © 2009, Texas Instruments Incorporated