S-814 Datasheet, PDF (22/32 Pages) Seiko Instruments Inc – LOW DROPOUT CMOS VOLTAGE REGULATOR

LOW DROPOUT CMOS VOLTAGE REGULATOR
S-814 Series
Rev.2.1_00
1-3. At power fluctuation
Output voltage (V_OUT) – Time (t)
V_IN=4.0→10 V, I_OUT=30 mA
10 V
4V
V_IN
V_OUT
3V
C_L=1 μF
C_L=4.7 μF
t [50 μs/div]
Load dependencies of overshoot
V_IN=V_OUT(S)+1 V→VOUT(S)+2 V, CL=1 μF
0.8
3V
0.6
0.4
5V
0.2
V_OUT=2 V
0
1.E−05 1.E−04 1.E−03 1.E−02 1.E−01 1.E+00
I_OUT [A]
V_DD dependencies of overshoot
V_IN=V_OUT(S)+1 V→V_DD, I_OUT=30 mA, C_L=1 μF
2.0
3V
1.5
V_OUT=2 V
1.0
0.5
5V
0
0
2
4
6
8
10
V_DD [V]
Load dependencies of undershoot
V_IN=V_OUT(S)+2 V→V_OUT(S)+1 V, C_L=1 μF
0.8
0.6
3V
5V
0.4
0.2
V_OUT=2 V
0
1.E−05 1.E−04 1.E−03 1.E−02 1.E−01 1.E+00
I_OUT [A]
10 V
V_IN=10→4.0 V, I_OUT=30 mA
4V
V_IN
V_OUT
3V
C_L=4.7 μF
C_L=1 μF
t [50 μs/div]
C_L dependencies of overshoot
V_IN=V_OUT(S)+1 V→V_OUT(S)+2 V, I_OUT=30 mA
1.4
1.2
5V
3V
1.0
0.8
0.6
0.4 ^VOUT^{=2 V}
0.2
0
0.1
1
10
100
C_L [μF]
Temperature dependencies of overshoot
V_IN=V_OUT(S)+1 V→V_OUT(S)+2 V, I_OUT=30 mA, C_L=1 μF
1.0
3V
0.8
0.6
0.4
V_OUT=2 V
5V
0.2
0
−50
0
50
100
Ta [°C]
C_L dependencies of undershoot
V_IN=V_OUT(S)+2 V→V_OUT(S)+1 V, I_OUT=30 mA
1.4
1.2
5V
1.0
3V
0.8
0.6
0.4
0.2
V_OUT=2 V
0
0.1
1
10
100
C_L [μF]
22
Seiko Instruments Inc.