S1135 Datasheet, PDF (30/48 Pages) Seiko Instruments Inc – HIGH RIPPLE-REJECTION LOW DROPOUT

HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1135 Series
Rev.2.2_00
3. Transient Response Characteristics of ON / OFF Pin (Ta = 25°C)
V_OUT = 1.0 V
V_IN = 2.0 V, t_r = 5.0 μs, C_L = 1.0 μF, C_IN = 1.0 μF, I_OUT = 100 mA
2.4
3
2.0
2
VON / OFF
1.6
1
1.2
0
0.8
VOUT
−1
0.4
−2
0
−50 0
−3
50 100 150 200
t [μs]
VOUT = 3.5 V
V_IN = 4.5 V, t_r = 5.0 μs, C_L = 1.0 μF, C_IN = 1.0 μF, I_OUT = 100 mA
6
6
5
VON / OFF
4
4
2
3
VOUT
0
2
−2
1
−4
0
−50 0
−6
50 100 150 200
t [μs]
VOUT = 2.5 V
V_IN = 3.5 V, t_r = 5.0 μs, C_L = 1.0 μF, C_IN = 1.0 μF, I_OUT = 100 mA
6
6
5
4
4
VON / OFF
2
3
0
2
VOUT
−2
1
−4
0
−50 0
−6
50 100 150 200
t [μs]
4. Output Capacitance vs. Characteristics of Discharge Time (Ta = 25°C)
S-1135 Series A / B type (with discharge shunt function)
V_IN = V_OUT + 1.0 V, I_OUT = no load
V_{ON / OFF} = V_OUT + 1.0 V → V_SS, t_f = 1 μs
2.5
2.0
1.5
1.0
0.5
0
0
VOUT(s) = 1.0 V
2.5 V
3.5 V
24 6 8
CL [μF]
10 12
V_{ON / OFF}
V_OUT
1 μs
t_DSC
V_SS
V_OUT × 10%
V_IN = V_OUT + 1.0 V
V_{ON / OFF} = V_OUT + 1.0 V → V_SS
Figure 24
Figure 25 Measurement Condition of Discharge Time
30
Seiko Instruments Inc.