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LMZ22005_15

更新时间： 2024-09-15 01:06:35
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德州仪器 - TI /
页数 文件大小 规格书
34页 1501K
描述
5A SIMPLE SWITCHER Power Module With 20-V Maximum Input Voltage

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LMZ22005_15 数据手册

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Community  
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Software  
Technical  
Documents  
LMZ22005  
SNVS686J –MARCH 2011–REVISED AUGUST 2015  
®
LMZ22005 5-A SIMPLE SWITCHER Power Module With 20-V Maximum Input Voltage  
1 Features  
2 Applications  
1
•
•
•
Integrated Shielded Inductor  
•
•
•
Point-of-load Conversions from 12V Input Rail  
Time-Critical Projects  
Simple PCB Layout  
Frequency Synchronization Input (650 kHz to  
950 kHz)  
Space Constrained/High Thermal Requirement  
Applications  
•
Negative Output Voltage Applications  
(see AN-2027 SNVA425)  
•
•
Flexible Start-up Sequencing Using External  
Soft-Start, Tracking and Precision Enable  
Protection Against Inrush Currents and Faults  
Such as Input UVLO and Output Short Circuit  
3 Description  
The LMZ22005 SIMPLE SWITCHER® power module  
is an easy-to-use step-down DC-DC solution capable  
of driving up to 5-A load. The LMZ22005 is available  
in an innovative package that enhances thermal  
performance and allows for hand or machine  
soldering.  
•
•
Junction Temperature Range –40°C to 125°C  
Single Exposed Pad for Easy Mounting and  
Manufacturing  
•
Fast Transient Response for Powering FPGAs  
and ASICs  
Fully Enabled for WEBENCH® Power Designer  
The LMZ22005 can accept an input voltage rail  
between 6 V and 20 V and can deliver an adjustable  
and highly accurate output voltage as low as 0.8 V.  
The LMZ22005 only requires two external resistors  
and three external capacitors to complete the power  
solution. The LMZ22005 is a reliable and robust  
design with the following protection features: thermal  
shutdown, input undervoltage lockout, output  
overvoltage protection, short circuit protection, output  
current limit, and the device allows start-up into a  
•
•
Pin Compatible With  
LMZ23605/LMZ23603/LMZ22003  
•
Electrical Specifications  
–
–
–
–
–
30-W Maximum Total Output Power  
Up to 5-A Output Current  
Input Voltage Range 6 V to 20 V  
Output Voltage Range 0.8 V to 6 V  
Efficiency up to 92%  
prebiased  
output.  
The  
sync  
input  
allows  
synchronization over the 650- to 950-kHz switching  
frequency range.  
•
Performance Benefits  
–
High Efficiency Reduces System Heat  
Generation  
Device Information(1)(2)  
–
–
Tested to EN55022 Class B(1)  
PART NUMBER  
PACKAGE  
BODY SIZE (NOM)  
LMZ22005  
NDW (7)  
10.16 mm × 9.85 mm  
Low Component Count, Only 5 External  
Components  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
–
–
Low Output Voltage Ripple  
(2) Peak reflow temperature equals 245°C. See SNAA214 for  
more details.  
Uses PCB as Heat Sink, No Airflow Required  
(1)  
EN 55022:2006, +A1:2007, FCC Part 15 Subpart B: 2007.  
See AN-2125 SNVA473 and layout for information on device  
under test. Vin = 12 V, Vo = 3.3 V, Io = 5 A  
Simplified Application Schematic  
Efficiency 5-V Output at 25°C Ambient  
100  
90  
80  
70  
60  
LMZ22005  
V
IN  
V
OUT  
@ 5A  
R
FBT  
Enable  
See Table  
Co  
220 PF  
R
FBB  
C
IN  
C
SS  
See Table  
22 PF  
0.47 PF  
50  
9 VIn  
12 Vin  
20 Vin  
40  
0
1
2
3
4
5
OUTPUT CURRENT (A)  
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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