S-1721 Seiko Instruments, S-1721 Datasheet - Page 16

• Manufacturer Part Number: S-1721
• Description: SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
• Manufacturer: Seiko Instruments

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SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1721 Series
Explanation of Terms
1. Low dropout voltage regulator
2. Output voltage (V
3. Line regulation
4. Load regulation (∆V
5. Dropout voltage (V
This IC’s voltage regulator has the low dropout voltage 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
output current, and fixed temperature.
*1. Differs depending on 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 input voltage V
gradually until the output voltage has dropped out to the value of 98% of output voltage V
V
V
Caution
OUT(S)
drop
= V
+ 1.0 V.
IN1
If the above conditions change, the output voltage value may vary and exceed the accuracy
range of the output voltage. See “
Data) (Per Circuit)” for details.
− (V
OUT3
OUT
∆V
drop
∆V
OUT2
× 0.98)
IN
)
)
OUT1
•V
)
OUT
Seiko Instruments Inc.
IN
Electrical Characteristics” and “
and the output voltage when; decreasing input voltage V
Characteristics (Typical
OUT3
, which is at V
Rev.1.1
*1
, fixed
_00
IN
IN
=