S-1701A2728-M5T1G SII [Seiko Instruments Inc], S-1701A2728-M5T1G Datasheet - Page 34

• Manufacturer Part Number: S-1701A2728-M5T1G
• Description: HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR WITH RESET FUNCTION
• Manufacturer: SII [Seiko Instruments Inc]

Regulator block
34
HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE REGULATOR WITH RESET FUNCTION
S-1701 Series
Selection of Input and Output Capacitors (C
Explanation of Terms
The S-1701 Series requires an output capacitor between the VOUT and VSS pins for phase compensation.
A ceramic capacitor with a capacitance of 1.0 µF or more provides a stable operation in all temperature
ranges. When using an OS capacitor, tantalum capacitor, or aluminum electrolytic capacitor, a capacitor
with a capacitance of 1.0 µF or more and an ESR of 10 Ω or less is required.
The output overshoot and undershoot values, which are transient response characteristics, vary depending
on the output capacitor value. The required capacitance value for the input capacitor differs depending on
the application.
The recommended application values are C
thorough evaluation using the actual device, including evaluation of temperature characteristics.
1. Low dropout voltage regulator
2. Low ESR
3. Output voltage (V
4. Line regulation
5. Load regulation (∆V
6. 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.
A capacitor whose ESR (Equivalent Series Resistance) is low. The S-1701 Series enables use of a low
ESR capacitor, such as a ceramic capacitor, for the output-side capacitor (C
10 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 on 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 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
drop
= 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



+ 1.0 V, and the output voltage at that point (V
∆
OUT
V
drop
∆
× 0.98)
OUT2
IN
)
V
•
OUT
)
V
)
1
OUT



Seiko Instruments Inc.
IN
= 1.0 µF or more and C
IN
IN1
, C
, which is the input voltage (V
L
)
OUT3
OUT3
L
= 1.0 µF or more, however, perform
× 0.98).
after V
L
). A capacitor whose ESR is
IN
was gradually decreased
IN
) at the point where
Rev.2.4
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