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TPS54233-Q1

更新时间： 2024-09-16 12:16:15
品牌 Logo 应用领域
德州仪器 - TI 转换器输入元件
页数 文件大小 规格书
25页 782K
描述
2-A, 28-V INPUT, STEP-DOWN DC/DC CONVERTER WITH ECO-MODE™

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TPS54233-Q1 数据手册

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TPS54233-Q1  
www.ti.com  
SLUSAZ7A –MARCH 2012–REVISED MARCH 2012  
2-A, 28-V INPUT, STEP-DOWN DC/DC CONVERTER WITH ECO-MODE™  
Check for Samples: TPS54233-Q1  
1
FEATURES  
APPLICATIONS  
2
•
•
Qualified for Automotive Applications  
•
LCD Displays, Peripherals, and Battery  
Chargers  
AEC-Q100 Test Guidance With the Following  
Results:  
•
•
Car Audio Power Supplies  
–
Device Temperature Grade1: –40°C to  
+125°C Ambient Operating Temperature  
Range  
5V, 12V and 24V Distributed Power Systems  
DESCRIPTION  
The TPS54233-Q1 is a 28 V, 2 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 TPS54233-  
Q1 is available in an 8-pin SOIC package that has  
been internally optimized to improve thermal  
performance.  
–
–
Device HBM ESD Classification Level H2  
Device CDM ESD Classification Level C3B  
•
•
•
3.5 V to 28 V Input Voltage Range  
Adjustable Output Voltage Down to 0.8 V  
Integrated 80-mΩ High-Side MOSFET Supports  
up to 2-A Continuous Output Current  
•
High Efficiency at Light Loads With a Pulse-  
Skipping Eco-mode™  
•
•
•
•
•
•
Fixed 300-kHz Switching Frequency  
Typical 1 μA 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 the SOIC8 Package  
Supported by SwitcherPro™ Software Tool  
(http://focus.ti.com/docs/toolsw/folders/print/s  
witcherpro.html)  
SIMPLIFIED SCHEMATIC  
EFFICIENCY  
100  
Ren1  
V
= 3.3 V  
V
O
V
= 12 V  
IN  
= 8 V  
95  
90  
85  
EN  
VIN  
CI  
VIN  
IN  
V
= 15 V  
IN  
Ren2  
TPS54233  
CBOOT  
BOOT  
PH  
LO  
V
= 18 V  
IN  
80  
75  
70  
VOUT  
SS  
CO  
D1  
RO1  
COMP  
C1  
R3  
CSS  
65  
60  
C2  
VSENSE  
GND  
RO2  
0
0.25 0.5 0.75  
1
1.25 1.5 1.75  
2
I
- Output Current - A  
O
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.  
2
Eco-mode, SwitcherPro, PowerPAD are trademarks of Texas Instruments.  
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 © 2012, Texas Instruments Incorporated  
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