MB3891 Datasheet, PDF (16/29 Pages) Fujitsu Component Limited. – Power Management IC for GSM Mobile Phone

MB3891
Waveform at rapid change of output load (LDO1) _{[Measurement diagram]}
OUT1
VBAT = 3.6 V
2.0
1.5
VREF = 1.225 V
1.0
VC
(IC internal) _LDO1
OUT1 120 mA
0.5
2
0.0
Ta = +25°C
VBAT = 3.6 V
1
CONT1 = “L”
0
CONT6 = OPEN
OUT1 = −120 mA 0 A
1 µF VC
4V
0V
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
t (ms)
Waveform at rapid change of output load (LDO2)
3.0
2.5
OUT2
Ta = +25°C
2.0
VBAT = 3.6 V
CONT1 = “L”
1.5
CONT2 = “H”
3
CONT6 = OPEN
1.0
2
[Measurement diagram]
VBAT = 3.6 V
VREF = 1.225 V
(IC internal) _LDO2
OUT2 50 mA
0.5
1
VC
0.0
0
OUT2 = 0 A −50 mA
1 µF VC
4V
0V
0 10 20 30 40 50 60 70 80 90 100
t (µs)
Waveform at rapid change of output load (LDO2)
3.0
2.5
OUT2
2.0
1.5
VC
3
1.0
2
Ta = +25°C
0.5
VBAT = 3.6 V
1
CONT1 = “L”
0.0
CONT2 = “H”
0
CONT6 = OPEN
OUT2 = −50 mA 0 A
[Measurement diagram]
VBAT = 3.6 V
VREF = 1.225 V
(IC internal) _LDO2
OUT2 50 mA
1 µF VC
0 10 20 30 40 50 60 70 80 90 100
t (ms)
16
4V
0V
(Continued)