Rev.1.2
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Load current dependence of load fluctuation undershoot
∆IOUT shows larger load current at load current
fluctuation while smaller current is fixed to 10 µA.
For example ∆IOUT=1.E-02 (A) means load current
fluctuation from 10 µA to 10 mA.
Output capacitor (CL) dependence of undershoot
VIN=VOUT(S)+1V,CL=2 F
VIN=VOUT(S)+1V ,IOUT=10 A 30mA
µ
µ →
0.4
1.0
0.8
0.6
0.4
0.2
0.0
0.3
0.2
0.1
0
3V
3V
5V
5V
VOUT=2V
1.E-01
VOUT=2V
1.E-03
1.E-02
1.E+00
1
10
CL(uF)
100
IOUT(A)
∆
VDD dependence of undershoot
VIN=VDD, IOUT=10 A 30mA,CL=2 F
Temperature dependence of undershoot
VIN=VOUT(S)+1V ,IOUT=10 A 30mA CL 2 F
µ → = µ
,
µ →
µ
0.4
0.3
0.2
0.1
0
0.5
0.4
0.3
0.2
0.1
0
3V
VOUT=2V
3V
VOUT=2V
5V
5V
0
2
4
VDD(V)
6
8
10
-50
0
50
100
Ta(°C)
Seiko Instruments Inc.
19
SII [ SEIKO INSTRUMENTS INC ]
