S-814 Datasheet, PDF (11/32 Pages) Seiko Instruments Inc – LOW DROPOUT CMOS VOLTAGE REGULATOR

Rev.2.1_00
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-814 Series
6. Dropout voltage (V_drop)
Indicates a difference between input voltage (V_IN1) and output voltage when output voltage falls by 98 %
of V_OUT(E) by gradually decreasing the input voltage.
V_drop=V_IN1−(V_OUT(E)×0.98)
7. Temperature coefficient of output voltage ⎜⎛ ^ΔVOUT ⎟⎞
⎝ ^{ΔTa • VOUT} ⎠
The shadowed area in Figure 11 is the range where V_OUT varies in the operating temperature range when
the temperature coefficient of the output voltage is ±100 ppm/°C.
V_OUT [V]
+0.28 mV/°C
V_OUT(E)^*1
−0.28mV/°C
−40
25
*1. The mesurement value of output voltage at 25°C.
85
Ta [°C]
Figure 11 Typical example of S-814A28A
A change in temperatures of output voltage [mV/°C] is calculated using the following equation.
[ ] [ ] [ ] ^ΔVOUT mV / °C ^*1 = VOUT(S) V ^*2 × ^ΔVOUT ppm / °C ^*3 ÷ 1000
ΔTa
ΔTa • VOUT
*1. The change in temperature of the dropout voltage
*2. Specified output voltage
*3. Output voltage temperature coefficient
Seiko Instruments Inc.
11