S-814 Datasheet, PDF (24/32 Pages) Seiko Instruments Inc – LOW DROPOUT CMOS VOLTAGE REGULATOR

LOW DROPOUT CMOS VOLTAGE REGULATOR
S-814 Series
Rev.2.1_00
1-4. At load fluctuation
Output voltage (V_OUT) – Time (t)
I_OUT=10 μA→30 mA, V_IN=4 V
30 mA
10 μA
3V
I_OUT
C_L=1 μF
V_OUT
C_L=4.7 μF
30 mA
10 μA
3V
I_OUT=30 mA→10 μA, V_IN=4 V
I_OUT
C_L=4.7 μF
C_L=1 μF
V_OUT
t [20 μs/div]
t [20 ms/div]
Load current dependencies of overshoot
1 ^{VIN=VOUT(S)+1 V, CL=1 μF}
C_L dependencies of overshoot
V_IN=V_OUT(s)+1 V, I_OUT=30 mA→10 μA
1.0
0.8
0.6
0.4
0.2
0
1.E−03
3V
5V
V_OUT=2 V
1.E−02
1.E−01
ΔI_OUT [A]
1.E+00
0.8 5 V
0.6
0.4
3V
0.2 _{VOUT=2 V}
0
0.1
1
10
100
C_L [μF]
Remark ΔI_OUT shows larger load current at load
current fluctuation. Smaller current at load
current fluctuation is fixed to 10 µA.
i.e. ΔI_OUT=1.E−02 [A] means load current
fluctuation from 10 mA to 10 µA.
V_DD dependencies of overshoot
1.0 ^{VIN=VDD, IOUT=30 mA→10 μA, CL=1 μF}
0.8
0.6
V_OUT=2 V
5V
3V
0.4
0.2
0
0
2
4
6
8
10
V_DD [V]
Temperature dependencies of overshoot
V_IN=V_OUT(S)+1 V, I_OUT=30 mA→10 μA, C_L=1 μF
1.0
0.8
0.6
5V
0.4
3V
0.2
V_OUT=2 V
0
−50
0
50
100
Ta [°C]
24
Seiko Instruments Inc.