S814 Datasheet, PDF (11/32 Pages) Seiko Instruments Inc – LOW DROPOUT CMOS VOLTAGE REGULATOR

Rev.3.1_00
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-814 Series
6. Dropout voltage (V_drop)
Indicates the difference between input voltage (V_IN1) and the output voltage when; decreasing input
voltage (V_IN) gradually until the output voltage has dropped out to the value of 98% of the actual output
voltage (V_OUT(E)).
V_drop = V_IN1−(V_OUT(E)×0.98)
7.
Output voltage temperature coefficient


ΔVOUT
ΔTa • VOUT


The shaded area in Figure 11 is the range where V_OUT varies in the operation temperature range when
the output voltage temperature coefficient is ±100 ppm/°C.
V_OUT
[V]
Example of S-814A28A typ. product
+0.28 mV/°C
V_OUT(E)^*1
−0.28 mV/°C
−40
+25
+85
Ta [°C]
*1. V_OUT(E) is the value of the output voltage measured at Ta = +25°C.
Figure 11
A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.
[ ] [ ] [ ] ^ΔVOUT
ΔTa
mV / °C
*1 _{= VOUT(S) V}
*2
×
ΔV OUT
ΔTa • VOUT
ppm / °C
*3 _{÷ 1000}
*1. Change in temperature of output voltage
*2. Set output voltage
*3. Output voltage temperature coefficient
Seiko Instruments Inc.
11