S1155 Datasheet, PDF (23/28 Pages) Seiko Instruments Inc – HIGH RIPPLE-REJECTION LOW DROPOUT

Rev.2.1_01
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
0.1
CIN = CL = 4.7 μF
Stable
500
IOUT [mA]
VIN
C_{IN S-1155 Series}
ON/OFF
VSS
VOUT
C_L^*1
R_ESR
*1. C_L: TAIYO YUDEN Co., Ltd. LMK316BJ475ML (4.7 μF)
Seiko Instruments Inc.
23