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TPS54394PWPR

更新时间： 2024-09-19 12:16:15
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德州仪器 - TI /
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23页 1077K
描述
3A Dual Channel Synchronous Step-Down Switcher with Integrated FET

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TPS54394PWPR 数据手册

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TPS54394  
www.ti.com  
SLVSBE6 –JUNE 2012  
3A Dual Channel Synchronous Step-Down Switcher with Integrated FET  
Check for Samples: TPS54394  
1
FEATURES  
APPLICATIONS  
2
•
D-CAP2™ Control Mode  
•
Point-of-Load Regulation in Low Power  
Systems for Wide Range of Applications  
–
–
Fast Transient Response  
–
–
–
–
–
Digital TV Power Supply  
Networking Home Terminal  
Digital Set Top Box (STB)  
DVD Player/Recorder  
No External Parts Required For Loop  
Compensation  
–
Compatible with Ceramic Output  
Capacitors  
•
•
•
Wide Input Voltage Range : 4.5 V to 18 V  
Output Voltage Range : 0.76 V to 7 V  
Gaming Consoles and Other  
DESCRIPTION  
Highly Efficient Integrated FETs Optimized for  
Low Duty Cycle Applications  
The TPS54394 is a dual, adaptive on-time D-CAP2™  
mode synchronous buck converter. The TPS54394  
enables system designers to complete the suite of  
various end equipment’s power bus regulators with a  
cost effective, low component count, and low standby  
current solution. The main control loops of the  
TPS54394 use the D-CAP2™ mode control which  
provides a very fast transient response with no  
external compensation components. The adaptive on-  
time control supports seamless transition between  
PWM mode at higher load conditions and Eco-  
mode™ operation at light loads. Eco-mode™ allows  
the TPS54394 to maintain high efficiency during  
lighter load conditions. The TPS54394 is able to  
adapt to both low equivalent series resistance (ESR)  
output capacitors such as POSCAP or SP-CAP, and  
ultra-low ESR, ceramic capacitors. The device  
provides convenient and efficient operation with input  
voltages from 4.5V to 18V.  
–
90 mΩ (High Side) and 60 mΩ (Low Side)  
•
•
•
•
•
•
•
•
•
•
•
High Initial Reference Accuracy  
Supports Constant 3 A at Both Channels  
Low-Side rDS(on) Loss-Less Current Sensing  
Fixed Soft Start : 1.0ms  
Non-Sinking Pre-Biased Soft Start  
Powergood  
700 kHz Switching Frequency  
Cycle-by-Cycle Over-Current Limit Control  
Hiccup Timer for Overload Protection  
OCL/UVLO/TSD Protections  
Adaptive Gate Drivers with Integrated Boost  
PMOS Switch  
•
OCP Constant Due To Thermally Compensated  
rDS(on) with 4000ppm/℃  
The TPS54394 is available in a 4.4mm×5.0mm 16 pin  
TSSOP (PWP) package, and is specified for an  
ambient temperature range from –40°C to 85°C.  
•
•
16-Pin HTSSOP  
Auto-Skip Eco-mode™ꢀfor High Efficiency at  
Light Load  
Input Voltage  
1
VIN2  
VIN1  
16  
15  
C12  
C11  
2
3
VBST1  
VBST2  
VO1  
C32  
C31  
L12  
L11  
VO2  
SW2 14  
SW1  
C22  
C21  
4
5
PGND1  
EN1  
PGND213  
EN2 12  
TPS54394  
HTSSOP16  
PGND  
PGND  
PG1  
6
7
8
PG2 11  
(PowerPAD)  
R11  
R21  
R12  
R22  
VFB1  
GND  
10  
VFB2  
C4  
9
VREG5  
PGND  
SGND  
SGND  
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
D-CAP2, Eco-mode, Eco-Mode 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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TPS54394PWPR 替代型号

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TPS54394PWP TI

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