S-1155 Datasheet, PDF (23/28 Pages) Seiko Instruments Inc – HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR

Rev.1.1_00
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1155 Series
S-1155B50
V_IN = 5.5 V, C_OUT = 4.7 µF, C_IN = 4.7 µF, I_OUT = 100 mA
6
1.2
4
1.0
2
VON/OFF
0.8
0
VOUT
0.6
−2
0.4
−4
IOUT
0.2
−6
0
−100 0 100 200 300 400 500
t [µs]
V_IN = 5.5 V, C_OUT = 4.7 µF, C_IN = 4.7 µF, I_OUT = 500 mA
6
1.2
4
VON/OFF
1.0
2
0.8
0
VOUT
0.6
−2
0.4
IOUT
−4
0.2
−6
0
−100 0 100 200 300 400 500
t [µs]
(5) Example of Equivalent Series Resistance vs. Output Current Characteristics (Ta = 25°C)
100
0.1
0
0.1
C_IN = C_L = 4.7 µF
Stable
500
I_OUT [mA]
VIN
C_IN
S-1155 Series
ON/OFF
VSS
VOUT
C_L
R_ESR
Seiko Instruments Inc.
23