Rev.1.2
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
(2) Power on/off control
V =10V ON/OFF=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
Output capacitor (CL) dependence of overshoot
VIN=VOUT(S)+1V IOUT=30mA, ON/OFF=0
VOUT(S)+1V
→
VIN=VOUT(S)+1V , CL=2 F, ON/OFF=0
VOUT(S)+1V
µ
→
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(uF)
100
VDD dependence of overshoot
Temperature dependence of overshoot
VIN=VOUT(S)+1V ,IOUT=30mA, CL=2 F, ON/OFF=0
VOUT(S)+1V
→
µ
VIN=VDD ,IOUT=30mA, CL=2 F, ON/OFF=0 VDD
µ
→
1.0
0.8
0.6
0.4
0.2
0.0
1.0
5V
3V
0.8
0.6
0.4
0.2
0.0
VOUT=2V
5V
3V
VOUT=2V
0
2
4
6
8
10
-50
0
50
100
VDD(V)
Ta °C
Seiko Instruments Inc.
15
SII [ SEIKO INSTRUMENTS INC ]
