SLVA339A Datasheet, PDF (7/9 Pages) Texas Instruments – High-Vin, High-Efficiency Power Solution Using DC/DC Converter With DVFS

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4.1 Test Result
The start-up waveform Figure 3 specifies the sequencing order that is required.
Bill of Materials
Figure 3. Sequencing in Start-up Waveform
100
V_IN = 2.3 V
90
100
4.2 V
90
80
V_IN = 3.3 V ^{VIN = 2.7 V}
70
V_IN = 3.6 V
60
V_IN = 4.2 V
50
40
V_IN = 5 V
80
70
5V
60
8.4 V
50
12 V
40
30
MODE = GND,
20
V_OUT = 1.8 V,
L = 2.2 mH (MIPSA25202R2),
10
C_OUT = 4.7 mF
0
0.1
1
10
100
I_O - Output Current - mA
Figure 4. Efficiency vs Output Current
1000
30
20
V_O = 3.3 V
T_A = 25^oC
10
PFM Mode
0
0.0001 0.001 0.01
0.1
1
10
I_O - Output Current- A
Figure 5. Efficiency vs Output Current
SLVA339A – June 2009 – Revised May 2010
High-Vin, High-Efficiency Power Solution Using DC/DC Converters With DVFS
7
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