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LMZ22008_15

更新时间： 2024-11-06 01:13:59
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8A SIMPLE SWITCHER Power Module With 20-V Maximum Input Voltage and Current Sharing

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Community  
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Technical  
Documents  
LMZ22008  
SNVS712H –FEBRUARY 2010–REVISED AUGUST 2015  
®
LMZ22008 8-A SIMPLE SWITCHER Power Module With 20-V Maximum Input Voltage and  
Current Sharing  
1 Features  
2 Applications  
1
•
•
•
Integrated Shielded Inductor  
Simple PCB Layout  
•
•
•
Point-of-load Conversions from 12-V Input Rail  
Time-Critical Projects  
Frequency Synchronization Input (350 kHz to 600  
kHz)  
Space Constrained and High Thermal  
Requirement Applications  
•
•
Current Sharing Capability  
•
Negative Output Voltage Applications  
See AN-2027 SNVA425  
Flexible Start-up Sequencing Using External  
Soft-Start, Tracking and Precision Enable  
3 Description  
•
Protection Against Inrush Currents and Faults  
such as Input UVLO and Output Short Circuit  
The LMZ22008 SIMPLE SWITCHER® power module  
is an easy-to-use step-down DC-DC solution capable  
of driving up to 8-A load. The LMZ22008 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 and Standard Pinout for Easy  
Mounting and Manufacturing  
Fully Enabled for WEBENCH® Power Designer  
•
•
The LMZ22008 can accept an input voltage rail  
between 6 V and 20 V and deliver an adjustable and  
highly accurate output voltage as low as 0.8 V. The  
LMZ22008 only requires two external resistors and  
external capacitors to complete the power solution.  
Pin Compatible With LMZ22010/06,  
LMZ12010/08/06, LMZ23610/08/06, and  
LMZ13610/08/06  
•
•
Electrical Specifications  
–
–
–
–
–
40-W Maximum Total Output Power  
Up to 8-A Output Current  
The LMZ22008 is a reliable and robust design with  
the following protection features: thermal shutdown,  
programmable input undervoltage lockout, output  
overvoltage protection, short circuit protection, output  
current limit, and allows start-up into a prebiased  
output.  
Input Voltage Range 6 V to 20 V  
Output Voltage Range 0.8 V to 6 V  
Efficiency up to 92%  
Performance Benefits  
The sync input allows synchronization over the 314-  
to 600-kHz switching frequency range and up to 6  
modules can be connected in parallel for higher load  
currents.  
–
High Efficiency Reduces System Heat  
Generation  
–
Low Radiated Emissions (EMI) Tested to  
EN55022  
Device Information(1)(2)  
–
–
–
–
Only 7 External Components  
Low Output Voltage Ripple  
No External Heat Sink Required  
PART NUMBER  
PACKAGE  
BODY SIZE (NOM)  
LMZ22008  
NDY (11)  
15.00 mm × 15.00 mm  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
Simple Current Sharing for Higher Current  
Applications  
(2) Peak reflow temperature equals 245°C. See SNAA214 for  
more details.  
NOTE: EN 55022:2006, +A1:2007, FCC Part 15 Subpart B,  
tested on Evaluation Board with EMI configuration.  
Simplified Application Schematic  
Efficiency 3.3-V Output at 25°C  
100  
LMZ22008  
90  
V
V
OUT  
IN  
80  
70  
Share  
C
Clock  
4.7 nF (OPT)  
FF  
60  
Enable  
6Vin  
R
FBT  
8Vin  
10Vin  
50  
See Table  
12Vin  
16Vin  
20Vin  
C
SS  
C
R
FBB  
C
40  
IN  
OUT  
2 x 330 PF  
0.47 PF  
(OPT)  
3 x 10 PF  
See Table  
0
2
4
6
8
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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