欢迎访问ic37.com |
会员登录 免费注册
发布采购

TPS54331DR 参数 Datasheet PDF下载

TPS54331DR图片预览
型号: TPS54331DR
PDF下载: 下载PDF文件 查看货源
内容描述: 3A , 28V输入降压SWIFTM DC /带ECO- MODTM DC转换器 [3A, 28V INPUT, STEP DOWN SWIFTM DC/DC CONVERTER WITH ECO-MODTM]
分类和应用: 转换器输入元件
文件页数/大小: 24 页 / 880 K
品牌: TI [ TEXAS INSTRUMENTS ]
 浏览型号TPS54331DR的Datasheet PDF文件第2页浏览型号TPS54331DR的Datasheet PDF文件第3页浏览型号TPS54331DR的Datasheet PDF文件第4页浏览型号TPS54331DR的Datasheet PDF文件第5页浏览型号TPS54331DR的Datasheet PDF文件第6页浏览型号TPS54331DR的Datasheet PDF文件第7页浏览型号TPS54331DR的Datasheet PDF文件第8页浏览型号TPS54331DR的Datasheet PDF文件第9页  
www.ti.com
......................................................................................................................................................
SLVS839B – JULY 2008 – REVISED OCTOBER 2008
3A, 28V INPUT, STEP DOWN SWIFT™ DC/DC CONVERTER WITH ECO-MODE™
1
FEATURES
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
µA
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.
3.5V to 28V Input Voltage Range
Adjustable Output Voltage Down to 0.8V
Integrated 80 mΩ High Side MOSFET Supports
up to 3A Continuous Output Current
High Efficiency at Light Loads with a Pulse
Skipping Eco-mode™
Fixed 570kHz Switching Frequency
Typical 1µA 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
For SWIFT™ Documentation, See the TI
Website at
2
APPLICATIONS
Consumer Applications such as Set-Top
Boxes, CPE Equipment, LCD Displays,
Peripherals, and Battery Chargers
Industrial and Car Audio Power Supplies
5V, 12V and 24V Distributed Power Systems
SIMPLIFIED SCHEMATIC
Ren1
EN
Ren2
TPS54331
Efficiency - %
EFFICIENCY
100
90
VIN
VIN
C
I
80
70
V
I
= 12 V
V
I
= 18 V
V
I
= 24 V
V
I
= 28 V
V
I
= 5 V
C
BOOT
BOOT
PH
SS
COMP
C
SS
C
2
R
3
C
1
VSENSE
GND
R
O2
D1
C
O
R
O1
L
O
VOUT
60
50
40
30
20
10
0
0.01
V
O
= 3.3 V
0.1
1
10
I
L
- Load Current - A
1
2
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 are trademarks of Texas Instruments.
Copyright © 2008, Texas Instruments Incorporated
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.