LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.2.3_01
S-1312 Series
4. Output capacitance vs. Characteristics of discharge time (Ta = +25°C)
1.0 μs
VIN = VOUT + 1.0 V, IOUT = no load,
VON / OFF = VOUT + 1.0 V → VSS, tf = 1.0 μs
VON / OFF
2.5
2.0
1.5
1.0
0.5
0
V
V
V
OUT(S) = 1.0 V
OUT(S) = 2.5 V
OUT(S) = 3.5 V
VSS
tDSC
VOUT
0
2
4
6
8
10
12
VOUT × 10%
CL [μF]
VIN = VOUT + 1.0 V
VON / OFF = VOUT + 1.0 V → VSS
Figure 21 S-1312 Series A / B type
(with discharge shunt function)
Figure 22 Measurement Condition of Discharge Time
5. Example of equivalent series resistance vs. Output current characteristics (Ta = +25°C)
CIN = CL = 0.22 μF
100
VIN
VOUT
CIN
Stable
S-1312 Series
VSS
*1
CL
ON / OFF
0
RESR
0.1
180
IOUT [mA]
*1. CL: TDK Corporation C2012X7R1H224K (0.22 μF)
Figure 23
Figure 24
29
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