LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.1.2
REFERENCE DATA
TRANSIENT RESPONSE CHARACTERISTICS (S-818A30A, Typical data: Ta=25°C)
INPUT VOLTAGE
or
LOAD CURRENT
Overshoot
OUTPUT VOLTAGE
Undershoot
(1) Power on
V =0 10V IOUT=30mA
→
IN
10V
0V
CL=4.7 F
µ
VIN
CL=2 F
µ
VOUT
0V
TIME(50usec/div)
Load dependence of overshoot
V =0 (S)+1V, CL=2 F
Output capacitor (CL) dependence of overshoot
V
→
µ
IN
OUT
V =0 VOUT(S)+1V, IOUT=30mA
→
IN
1.0
0.8
0.6
0.4
0.2
0.0
1.0
0.8
0.6
0.4
0.2
0.0
5V
VOUT=2V
3V
5V
3V
VOUT=2V
1.E-05 1.E-04 1.E-03 1.E-02 1.E-01 1.E+00
IOUT(A)
1
10
CL(µF)
100
VDD dependence of overshoot
Temperature dependence of overshoot
V =0
(S)+1V, IOUT=30mA,CL=2 F
V
→
V =0 VDD, I =30mA,CL=2 F
µ
→
µ
IN
IN
OUT
1.0
0.8
0.6
0.4
0.2
0.0
1.0
0.8
0.6
0.4
0.2
0.0
5V
3V
5V
3V
VOUT=2V
VOUT=2V
0
2
4
6
8
10
-50
0
50
100
VDD(V)
Ta(°C
14
Seiko Instruments Inc.