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tps5450 数据手册
资料介绍
tps5450 数据手册，TI DCDC 5.5V-36V输入，5A输出。
部分文件列表
| 文件名 | 大小 |
| tps5450.pdf | 2M |
部分页面预览
（完整内容请下载后查看）SLVS757D –MARCH 2007–REVISED DECEMBER 2014
TPS5450 5-A, Wide Input Range, Step-Down Converter
1 Features
3 Description
The TPS5450 is
a
high-output-current PWM
1
•
•
•
Wide Input Voltage Range: 5.5 V to 36 V
converter that integrates a low-resistance, high-side
N-channel MOSFET. Included on the substrate with
the listed features are 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
TPS5450 feedback loop is internally compensated.
Up to 5-A Continuous (6-A Peak) Output Current
High Efficiency Greater Than 90% 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 Part
Count
Fixed 500-kHz Switching Frequency for Small
Filter Size
•
•
18-μA Shutdown Supply Current
Improved Line Regulation and Transient
Response by Input Voltage Feed Forward
•
•
•
System Protected by Overcurrent Limiting,
Overvoltage Protection and Thermal Shutdown
The TPS5450 device is available in a thermally-
enhanced, 8-pin SOIC PowerPAD package. TI
provides evaluation modules and software tool to aid
in achieving high-performance power supply designs
to meet aggressive equipment development cycles.
–40°C to 125°C Operating Junction Temperature
Range
Available in Small Thermally Enhanced 8-Pin
SOIC PowerPAD™ Package
PART NUMBER
PACKAGE
BODY SIZE (NOM)
2 Applications
TPS5450
HSOP (8)
4.89 mm × 3.90 mm
•
•
•
•
High Density Point-of-Load Regulators
LCD Displays, Plasma Displays
Battery Chargers
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
12-V and 24-V Distributed Power Systems
Simplified�Schematic
Efficiency�vs�Output�Current
100
95
90
85
80
75
70
VIN
VOUT
VIN
PH
BOOT
NC
NC
ENA VSENSE
GND
V =�12�V,
65
60
I
V
=�5�V,
O
f
=�500�kHz,
=�25°C
s
55
50
T
A
0
1
2
3
4
- Output Current - A
5
6
I
O
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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