S-818_1 Datasheet, PDF (25/32 Pages) Seiko Instruments Inc – LOW DROPOUT CMOS VOLTAGE REGULATOR

Rev.2.1_00
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-818 Series
Load current dependence of load fluctuation undershoot C_L dependence of undershoot
VIN=IOUT(S)+1 V, CL=2 µF
VIN=VOUT(S)+1 V, IOUT=10 µA→30 mA
1.0
0.4
0.8
0.6
3V
5V
0.4
0.3
3V
0.2
0.2
V_OUT=2 V
0.1
5V
VOUT=2 V
0.0
0
1.E−03
1.E−02
1.E−01
∆IOUT [A]
1.E00
1
10
100
CL [µF]
Remark ∆I_OUT shows larger load current at load current
fluctuation while smaller current is fixed to
10 µA. For example ∆I_OUT=1.E−02 (A) means
load current fluctuation from 10 µA to 10 mA.
V_DD dependence of undershoot
VIN=VDD, IOUT=10 µA→30 mA, CL=2 µF
0.4
Temperature dependence of undershoot
VIN=VOUT(S)+1 V, IOUT=10 µA→30 mA, CL=2 µF
0.5
3V
0.3
0.2
VOUT=2 V
0.1
5V
0.4
VOUT=2 V
3V
0.3
0.2
0.1
5V
0
0
2
4
6
8
10
VDD [V]
0
−50
0
50
100
Ta [°C]
Seiko Instruments Inc.
25