IR3897 IRF [International Rectifier], IR3897 Datasheet - Page 11

• Manufacturer Part Number: IR3897
• Description: 4A HIGHLY INTEGRATED SUPLRBUCK
• Manufacturer: IRF [International Rectifier]

TYPICAL EFFICIENCY AND POWER LOSS CURVES
PVin = 12V, Vcc = External 5V, 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)
11
1.0
1.2
1.8
3.3
5
AUGUST 08, 2012 |DATA SHEET | Rev 3.3
98
96
94
92
90
88
86
84
82
80
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0.4
0.4
0.8
0.8
LOUT (µH)
Single‐Input Voltage, Synchronous Buck Regulator
1.5
1.5
2.2
3.3
3.3
1.2
1.2
1.0V
1.0V
1.6
1.6
7443340220 (Wurth Elektronik)
7443340330 (Wurth Elektronik)
7443340330 (Wurth Elektronik)
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1.2V
PCMB065T-1R5MS (Cyntec)
PCMB065T-1R5MS (Cyntec)
1.2V
Load Current (A)
Load Current (A)
4A Highly Integrated SupIRBuck
2
2
1.8V
1.8V
2.4
2.4
P/N
3.3V
3.3V
2.8
2.8
5.0V
5.0V
3.2
3.2
3.6
3.6
TM
4
4
DCR (mΩ)
6.7
6.7
4.4
6.5
6.5
IR3897
PD‐97663