9A Highly Integrated SupIRBuckTM
Single‐Input V-o1lt0a-ge, Synchronous Buck Regulator
PD‐97661
IR3899
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)
1.0
1.2
1.8
3.3
5
LOUT (µH)
0.51
0.51
0.68
1.2
1.2
P/N
59PR9876N (Vitec)
59PR9876N (Vitec)
ETQP4LR68XFC (Panasonic)
MPL105‐1R2 (Delta)
MPL105‐1R2 (Delta)
DCR (mΩ)
0.29
0.29
1.58
2.9
2.9
98
96
94
92
90
88
86
84
82
80
78
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
2.6
2.2
1.8
1.4
1
0.6
0.2
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
10 JANUARY 18, 2013 |DATA SHEET | 3.6