S-1170B Seiko Instruments, S-1170B Datasheet - Page 11

• Manufacturer Part Number: S-1170B
• Description: Voltage Regulator
• Manufacturer: Seiko Instruments

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HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.3.0
Explanation of Terms
1. Low dropout voltage regulator
2. Low ESR
3. Output voltage (V
4.
5. Load regulation (∆V
6. Dropout voltage (V
Line
The low dropout voltage regulator is a voltage regulator whose dropout voltage is low due to its built-in
low on-resistance transistor.
A capacitor whose ESR (Equivalent Series Resistance) is low. The S-1170 Series enables use of a low
ESR capacitor, such as a ceramic capacitor, for the output-side capacitor C
0.5 Ω or less can be used.
The accuracy of the output voltage is ensured at ±1.0% under the specified conditions of fixed input
voltage
*1. Differs depending the product.
Indicates the dependency of the output voltage on the input voltage. That is, the values show how much
the output voltage changes due to a change in the input voltage with the output current remaining
unchanged.
Indicates the dependency of the output voltage on the output current. That is, the values show how
much the output voltage changes due to a change in the output current with the input voltage remaining
unchanged.
Indicates the difference between the input voltage V
the output voltage has fallen to 98% of the output voltage value V
from V
V
Caution If the above conditions change, the output voltage value may vary and exceed the
drop
_00
regulation
= V
IN
*1
IN1
, fixed output current, and fixed temperature.
= V
accuracy range of the output voltage. Please see the electrical characteristics and
attached characteristics data for details.
− (V
OUT(S)




OUT3
∆V
OUT
+ 1.0 V, and the output voltage at that point (V
drop
∆V
IN
OUT2
)
× 0.98)
)
OUT1
•
V
)
OUT




Seiko Instruments Inc.
IN1
, which is the input voltage (V
OUT3
OUT3
× 0.98).
after V
L
. A capacitor whose ESR is
IN
was gradually decreased
IN
) at the point where
S-1170 Series
11