ACT8332
STEP-DOWN DC/DC CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS
(ACT8332NDAQB, V
VP1
= 3.6V, L = 3.3µH, C
VP1
= 2.2μF, C
OUT1
= 10μF, T
A
= 25°C, unless otherwise specified.)
Rev1, 24-May-10
REG1 Efficiency vs. Load Current
100
V
OUT1
= 1.8V
90
3.2V
650
REG1 Transient Peak Inductor Current
ACT8332-002
Peak Inductor Current (mA)
ACT8332-001
630
Efficiency (%)
80
3.6V
4.2V
610
70
590
60
570
550
50
0.1
1
10
100
1000
3.0
3.5
4.0
4.5
5.0
5.5
Output Current (mA)
VP1 Voltage (V)
REG1 MOSFET Resistance
600
500
PMOS
0.2
REG1 Load Regulation
Load Regulation Error (%)
ACT8332-003
ACT8332-004
0.0
-0.2
-0.4
-0.6
-0.8
-1.0
4.2V
R
DSON
(mΩ)
400
300
200
100
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
NMOS
3.6V
0
50
100
150
200
250
300
350
400
VP1 Voltage (V)
Output Current (mA)
OUT1 Regulation Voltage
1.812
1.808
ACT8332-005
I
OUT1
= 35mA
OUT1 Voltage (V)
1.804
1.800
1.796
1.792
1.788
-40
-20
0
20
40
60
85
Temperature (°C)
Innovative Power
TM
ActivePMU
TM
-7-
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