ir3840 International Rectifier Corp., ir3840 Datasheet - Page 10

• Manufacturer Part Number: ir3840
• Description: Integrated 12a Synchronous Buck Regulator
• Manufacturer: International Rectifier Corp.

02/09/09
Typical Efficiency and Power Loss Curves
Vin=5V, Vcc=5V, Io=1A-12A, Fs=600kHz, Room Temperature, No Air Flow
For all the output voltages, L=0.3uH (DCR=0.29 mΩ, P/N: 59PR9874N)
2.5
2.3
2.1
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
0.3
0.1
97
95
93
91
89
87
85
83
81
79
1.0
1
2.0
0.7Vout
1.2Vout
2
0.7Vout
1.2Vout
3.0
3
4.0
4
0.75Vout
1.5Vout
0.75Vout
1.5Vout
5.0
5
Load Current (A)
Load Current (A)
6.0
6
0.9Vout
1.8Vout
0.9Vout
1.8Vout
7.0
7
8.0
8
1.0Vout
2.5Vout
1.0Vout
2.5Vout
9.0
9
10.0
10
1.1Vout
3.3Vout
1.1Vout
3.3Vout
11.0
11
IR3840MPbF
12.0
12
10