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TPS54331-Q1 Datasheet Preview

TPS54331-Q1 Datasheet

Step-Down DC-DC Converter

No Preview Available !

TPS54331-Q1
www.ti.com
SLVSAB5 – NOVEMBER 2010
3-A, 28-V INPUT, STEP-DOWN SWIFT™ DC/DC CONVERTER WITH Eco-Mode™
Check for Samples: TPS54331-Q1
FEATURES
1
2 Qualified for Automotive Applications
• 3.5V to 28V Input Voltage Range
• Adjustable Output Voltage Down to 0.8V
• Integrated 80 mHigh Side MOSFET Supports
up to 3A Continuous Output Current
• High Efficiency at Light Loads with Pulse
Skipping Eco-mode™ Control
• Fixed 570kHz Switching Frequency
• Typical 1mA Shutdown Quiescent Current
• Adjustable Slow Start Limits Inrush Currents
• Programmable UVLO Threshold
• Overvoltage Transient Protection
• Cycle-by-Cycle Current Limit, Frequency Fold
Back and Thermal Shutdown Protection
• Available in Easy-to-Use SOIC8 Package
• Supported by SwitcherPro™ Software Tool
(http://focus.ti.com/docs/toolsw/folders/print/s
witcherpro.html)
• For SWIFT™ Documentation, See the TI
Website at www.ti.com/swift
APPLICATIONS
• Consumer Applications such as Set-Top
Boxes, CPE Equipment, LCD Displays,
Peripherals, and Battery Chargers
• Industrial and Car Audio Power Supplies
• 5-V, 12-V and 24-V Distributed Power Systems
DESCRIPTION
The TPS54331 is a 28-V, 3-A non-synchronous buck
converter that integrates a low RDS(on) high side
MOSFET. To increase efficiency at light loads, a
pulse skipping Eco-mode™ feature is automatically
activated. Furthermore, the 1 mA shutdown supply
current allows the device to be used in battery
powered applications. Current mode control with
internal slope compensation simplifies the external
compensation calculations and reduces component
count while allowing the use of ceramic output
capacitors. A resistor divider programs the hysteresis
of the input under-voltage lockout. An overvoltage
transient protection circuit limits voltage overshoots
during startup and transient conditions. A cycle by
cycle current limit scheme, frequency fold back and
thermal shutdown protect the device and the load in
the event of an overload condition. The TPS54331 is
available in an 8-pin SOIC package that has been
internally optimized to improve thermal performance.
SIMPLIFIED SCHEMATIC
Ren1
Ren2
EN
VIN
TPS54331
BOOT
PH
SS
COMP
CSS
C1
C2
R3
VSENSE
GND
VIN
CI
CBOOT
LO
D1
CO
VOUT
RO1
RO2
100
90
80
70
60
50
40
30
20
10
0
0.01
EFFICIENCY
VI = 12 V
VI = 18 V
VI = 24 V
VI = 28 V
VI = 5 V
VO = 3.3 V
0.1
1
10
IL - Load 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, Eco-mode, SwitcherPro, 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.
Copyright © 2010, Texas Instruments Incorporated




etcTI

TPS54331-Q1 Datasheet Preview

TPS54331-Q1 Datasheet

Step-Down DC-DC Converter

No Preview Available !

TPS54331-Q1
SLVSAB5 – NOVEMBER 2010
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
For additional design needs, see:
IO(Max)
Input Voltage Range
Switching Freq. (Typ)
Switch Current Limit (Min)
Pin/Package
TPS54231
2A
3.5V - 28V
570kHz
2.3A
8SOIC
TPS54232
2A
3.5V - 28V
1000kHz
2.3A
8SOIC
TPS54233
2A
3.5V - 28V
285kHz
2.3A
8SOIC
TPS54331
3A
3.5V - 28V
570kHz
3.5A
8SOIC
TPS54332
3.5A
3.5V - 28V
1000kHz
4.2A
8SO PowerPAD™
TJ
–40°C to 150°C SOIC – D
ORDERING INFORMATION(1)
PACKAGE (2)
ORDERABLE PART NUMBER
Reel of 2500
TPS54331QDRQ1
TOP-SIDE MARKING
54331Q
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
ABSOLUTE MAXIMUM RATINGS(1)
over operating free-air temperature range (unless otherwise noted)
VIN
EN
Input voltage
BOOT
VSENSE
COMP
SS
BOOT-PH
Output voltage
PH
PH (10 ns transient from ground to negative peak)
EN
Source current
BOOT
VSENSE
PH
VIN
Sink current
COMP
SS
Operating junction temperature
Storage temperature
VALUE
–0.3 to 30
–0.3 to 6
38
–0.3 to 3
–0.3 to 3
–0.3 to 3
8
–0.6 to 30
–5
100
100
10
9
9
100
200
–40 to 150
–65 to 150
UNIT
V
V
mA
mA
mA
A
A
mA
°C
°C
(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
ESD PROTECTION
PARAMETER
ESD
Electrostatic discharge rating
Human-Body Model (HBM)
Charged-Device Model (CDM)
Machine Model (MM)
MAX
1000
1000
100
UNIT
V
V
V
2
Submit Documentation Feedback
Product Folder Link(s): TPS54331-Q1
Copyright © 2010, Texas Instruments Incorporated


Part Number TPS54331-Q1
Description Step-Down DC-DC Converter
Maker etcTI
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