S-1121 Seiko Instruments, S-1121 Datasheet - Page 12

• Manufacturer Part Number: S-1121
• Description: (S-1111 / S-1121) HIGH RIPPLE-REJECTION LOW DROPOUT
• Manufacturer: Seiko Instruments

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12
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1111/1121 Series
Explanation of Terms
1. Low dropout voltage regulator
2. Output voltage (V
3.
4. Load regulation (ΔV
5. Dropout voltage (V
The low dropout voltage regulator is a voltage regulator whose dropout voltage is low due to its built-in
low on-resistance transistor.
The accuracy of the output voltage is ensured at ±1.0% under the specified conditions of fixed input
voltage
*1. Differs depending the product.
Caution If the above conditions change, the output voltage value may vary and exceed the
Indicates the dependency of the output voltage on the input voltage. That is, the value shows 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 value shows 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
Line
drop
= V
regulation
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
⎛
⎜ ⎜
⎝
ΔV
+ 1.0 V, and the output voltage at that point (V
OUT
ΔV
drop
× 0.98)
IN
OUT2
)
OUT1
)
•
)
V
OUT
⎞
⎟ ⎟
⎠
Seiko Instruments Inc.
IN1
, which is the input voltage (V
OUT3
OUT3
× 0.98).
after V
IN
was gradually decreased
IN
) at the point where
Rev.4.1
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