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IR3899 Datasheet(PDF) 10 Page - International Rectifier

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

IR3899 Datasheet(HTML) 10 Page - International Rectifier

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August 08, 2012 |DATA SHEET | 3.4
10
IR3899 
9A Highly Integrated SupIRBuck
TM  
Single‐Input Voltage, Synchronous Buck Regulator  
PD‐97661
TYPICAL EFFICIENCY AND POWER LOSS CURVES 
 
PVin = 12V, Vcc = Internal LDO (4.4V/6.4V), Io = 0A‐9A, Fs = 600KHz, Room Temperature, No Air Flow. Note that the 
efficiency and power loss curves include the losses of IR3899, the inductor losses and the losses of the input and output 
capacitors. 
The table below shows the inductors used for each of the output voltages in the efficiency measurement. 
VOUT (V) 
LOUT (µH)
P/N
DCR (mΩ)
1.0 
0.51 
59PR9876N (Vitec) 
0.29 
1.2 
0.51 
59PR9876N (Vitec) 
0.29 
1.8 
0.68 
ETQP4LR68XFC (Panasonic) 
1.58 
3.3 
1.2 
MPL105‐1R2 (Delta) 
2.9 
1.2 
MPL105‐1R2 (Delta) 
2.9 
 
78
80
82
84
86
88
90
92
94
96
98
0.9
1.8
2.7
3.6
4.5
5.4
6.3
7.2
8.1
9
Load Current (A)
1.0V
1.2V
1.8V
3.3V
5.0V
 
0.2
0.6
1
1.4
1.8
2.2
2.6
0.9
1.8
2.7
3.6
4.5
5.4
6.3
7.2
8.1
9
Load Current (A)
1.0V
1.2V
1.8V
3.3V
5.0V
 


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