S-818_1 Datasheet, PDF (22/32 Pages) Seiko Instruments Inc – LOW DROPOUT CMOS VOLTAGE REGULATOR

LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Rev.2.1_00
3. Power fluctuation
10V
V_IN
4V
V_OUT
3V
V_IN=4_→10V I_OUT=30mA
CL=2_µF
CL=4.7_µF
10V
V_IN
4V
V_OUT
3V
V_IN=10_→4V I_OUT=30mA
CL=4.7_µF
TIME(50usec/div)
Load dependencies of overshoot
VIN=VOUT(S)+1 V→VOUT(S)+2 V, CL=2 µF
0.6
0.4
VOUT=2 V
0.2
3V
5V
0
1.E−05 1.E−04 1.E−03 1.E−02 1.E−01 1.E+00
IOUT [A]
V_DD dependencies of overshoot
VIN=VOUT(S)+1 V→VDD, IOUT=30 mA, CL=2 µF
0.6
3V
0.4
VOUT=2 V
0.2
5V
0
0
2
4
6
8
10
VDD [V]
CL=2_µF
TIME(50usec/div)
C_L dependence of overshoot
VIN=VOUT(S)+1 V→VOUT(S)+2 V, IOUT=30 mA
0.05
0.04
0.03
VOUT=2 V
3V
0.02
0.01
5V
0
1
10
100
CL [µF]
Temperature dependence
VIN=VOUT(S)+1 V→VOUT(S)+2 V, IOUT=30 mA, CL=2 µF
0.06
0.05
0.04
3V
VOUT=2 V
0.03
0.02
0.01
0
−50
0
5V
50
100
Ta [°C]
22
Seiko Instruments Inc.