S-1172 Seiko Instruments, S-1172 Datasheet - Page 12

• Manufacturer Part Number: S-1172
• Description: HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
• Manufacturer: Seiko Instruments

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12
HIGH RIPPLE-REJECTION LOW DROPOUT HIGH OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1172 Series
Explanation of Terms
1. Low dropout voltage regulator
2. Output voltage (V
4. Load regulation (∆V
5. Dropout voltage (V
3. Line regulation
This IC’s voltage regulator has the low dropout voltage due to its built-in transistor with low on-resistance.
The accuracy of the output voltage is ensured at ±1.0% or ±15 mV
voltage
*1. Differs depending on the product.
*2. When V
Caution
Indicates the dependency of the output voltage against the input voltage. That is, the value shows how much the
output voltage changes due to a change in the input voltage after fixing output current constant.
Indicates the dependency of the output voltage against the output current. That is, the value shows how much the
output voltage changes due to a change in the output current after fixing output current constant.
Indicates the difference between the output voltage and the input voltage V
decreasing input voltage V
V
V
OUT3
drop
= V
, which is at V
*1
IN1
, fixed output current, and fixed temperature.
range of the output voltage. See “
Data)” for details.
If the above conditions change, the output voltage value may vary and exceed the accuracy
− (V
OUT
OUT3
< 1.5 V : ±15 mV, When 1.5 V ≤ V
IN
× 0.98)



= V
OUT
drop
∆
OUT2
OUT(S)
V
)
∆
IN
)
IN
V
)
•
OUT1
gradually until the output voltage has dropped to the value of 98% of output voltage
V
+ 1.0 V or 5.5 V.
OUT



Seiko Instruments Inc.
OUT
Electrical Characteristics” and “
: ±1.0%
*2
under the specified conditions of fixed input
IN1
, which is the input voltage (V
Characteristics (Typical
Rev.1.1
IN
) when;
_00