IR3899M_15 Datasheet, PDF (11/45 Pages) International Rectifier – Single‐Input Voltage, Synchronous Buck Regulator

9A Highly Integrated SupIRBuck^TM
Single‐Input V_-o₁lt₁a_-ge, Synchronous Buck Regulator
PD‐97661
IR3899
TYPICAL EFFICIENCY AND POWER LOSS CURVES
PVin = 12V, Vcc = External 5V, 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
97
95
93
91
89
87
85
83
81
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
2.9
2.5
2.1
1.7
1.3
0.9
0.5
0.1
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
11 JANUARY 18, 2013 |DATA SHEET | 3.6