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IR3899 Datasheet(PDF) 34 Page - International Rectifier

Part # IR3899
Description  9A HIGHLY INTEGRATED SUPLRBUCK
PDF  43 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IR3899 Datasheet(HTML) 34 Page - International Rectifier

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August 08, 2012 |DATA SHEET | 3.4
34
IR3899 
9A Highly Integrated SupIRBuck
TM  
Single‐Input Voltage, Synchronous Buck Regulator  
PD‐97661
TYPICAL OPERATING WAVEFORMS 
Vin = 12V, Vo = 1.2V, Iout = 0‐9A, Room Temperature, No Air Flow  
 
Figure 30: Start up at 9A Load,  
Ch1:Vin, Ch2:Vo, Ch3:PGood Ch4:Enable  
 
Figure 32: Start up with 1V Pre Bias,  
0A Load, Ch2:Vo 
 
Figure 34: Inductor node at 9A load, Ch2:LX  
 
Figure 31: Start up at 9A Load,  
Ch1:Vin, Ch2:Vo, Ch3:Vcc, Ch4:PGood 
 
Figure 33: Output Voltage Ripple,  
9A Load, Ch2:Vout 
 
Figure 35: Short Circuit Recovery,  
Ch2‐Vout, Ch4:Iout (5A/Div)  
 



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