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IR3897 Datasheet(PDF) 12 Page - International Rectifier

Part # IR3897
Description  4A HIGHLY INTEGRATED SUPLRBUCK
PDF  45 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IR3897 Datasheet(HTML) 12 Page - International Rectifier

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AUGUST 08, 2012 |DATA SHEET |    Rev 3.3
12
IR3897 
4A Highly Integrated SupIRBuck
TM  
Single‐Input Voltage, Synchronous Buck Regulator  
PD‐97663
83
85
87
89
91
93
95
97
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
3.6
4
Load Current (A)
1.0V
1.2V
1.8V
3.3V
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
3.6
4
Load Current (A)
1.0V
1.2V
1.8V
3.3V
TYPICAL EFFICIENCY AND POWER LOSS CURVES 
 
PVin = 5.0V, Vcc = 5.0V, Io = 0A‐4A, Fs = 600KHz, Room Temperature, No Air Flow. Note that the efficiency and power loss 
curves include the losses of IR3897, 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 
1
SPM6550T-1R0M (TDK)
4.7
1.2 
1
SPM6550T-1R0M (TDK)
4.7
1.8 
1.5
PCMB065T-1R5MS (Cyntec)
6.7
3.3 
1.5
PCMB065T-1R5MS (Cyntec)
6.7
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 



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