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LMZ31503RUQR

更新时间： 2024-11-09 12:49:47
品牌 Logo 应用领域
德州仪器 - TI 电源电路
页数 文件大小 规格书
29页 973K
描述
3A SIMPLE SWITCHER Power Module with 4.5V-14.5V Input in QFN Package

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LMZ31503RUQR 数据手册

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LMZ31503  
www.ti.com  
SNVS992 –JULY 2013  
®
3A SIMPLE SWITCHER Power Module with 4.5V-14.5V Input in QFN Package  
Check for Samples: LMZ31503  
1
FEATURES  
DESCRIPTION  
The LMZ31503 SIMPLE SWITCHER® power module  
is an easy-to-use integrated power solution that  
2
•
Complete Integrated Power Solution Allows  
Small Footprint, Low-Profile Design  
combines  
a 3-A DC/DC converter with power  
•
9mm x 15mm x 2.8mm package  
- Pin Compatible with LMZ31506  
MOSFETs, a shielded inductor, and passives into a  
low profile, QFN package. This total power solution  
allows as few as  
eliminates the loop compensation and magnetics  
design process.  
3 external components and  
•
•
Efficiencies Up To 95%  
Wide-Output Voltage Adjust  
0.8 V to 5.5 V, with 1% Reference Accuracy  
The 9×15×2.8 mm QFN package is easy to solder  
onto a printed circuit board and allows a compact  
point-of-load design with up to 95% efficiency and  
excellent power dissipation with a thermal impedance  
of 13°C/W junction to ambient. The device delivers  
the full 3-A rated output current at 85°C ambient  
temperature without airflow.  
•
•
Optional Split Power Rail Allows  
Input Voltage Down to 1.6 V  
Adjustable Switching Frequency  
(330 kHz to 780 kHz)  
•
•
•
•
•
•
•
•
•
•
•
Synchronizes to an External Clock  
Adjustable Slow-Start  
The LMZ31503 offers the flexibility and the feature-  
set of a discrete point-of-load design and is ideal for  
powering performance DSPs and FPGAs. Advanced  
packaging technology afford a robust and reliable  
power solution compatible with standard QFN  
mounting and testing techniques.  
Output Voltage Sequencing / Tracking  
Power Good Output  
Programmable Undervoltage Lockout (UVLO)  
Overcurrent Protection (Hiccup-Mode)  
Over Temperature Protection  
Pre-bias Output Start-up  
SIMPLIFIED APPLICATION  
Operating Temperature Range: –40°C to 85°C  
Enhanced Thermal Performance: 13°C/W  
LMZ31503  
Meets EN55022 Class B Emissions  
- Integrated Shielded Inductor  
PVIN  
VIN  
PWRGD  
VOUT  
V
IN  
V
OUT  
APPLICATIONS  
C
C
OUT  
IN  
SENSE+  
•
•
•
•
•
Broadband & Communications Infrastructure  
Automated Test and Medical Equipment  
Compact PCI / PCI Express / PXI Express  
DSP and FPGA Point of Load Applications  
High Density Distributed Power Systems  
RT/CLK  
INH/UVLO  
SS/TR  
VADJ  
STSEL  
100  
95  
90  
85  
80  
75  
70  
65  
60  
55  
R
SET  
PGND AGND  
50  
VIN = PVIN = 5 V,VOUT = 3.3V, fSW = 630 kHz  
45  
40  
VIN = PVIN = 12 V,VOUT = 3.3V, fSW = 630 kHz  
0
0.5  
1
1.5  
2
2.5  
3
Output Current (A)  
G000  
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
SIMPLE SWITCHER is a registered trademark 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 © 2013, Texas Instruments Incorporated  
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