HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.2.2_01
S-1135 Series
Explanation of Terms
1. Low dropout voltage regulator
This voltage regulator has the low dropout voltage due to its built-in low on-resistance transistor.
2. Output voltage (VOUT
)
The accuracy of the output voltage is ensured at 1.0% or 15 mV*1 under the specified conditions of fixed input
voltage*2, fixed output current, and fixed temperature.
*1. When VOUT < 1.5 V : 15 mV, When 1.5 V ≤ VOUT : 1.0%
*2. Differs depending on the product.
Caution If the above conditions change, the output voltage value may vary and exceed the accuracy range
of the output voltage. Refer to “ Electrical Characteristics” and “ Characteristics (Typical
Data)” for details.
ΔVOUT1
ΔVIN • VOUT
3. Line regulation
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.
4. Load regulation (ΔVOUT2
)
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.
5. Dropout voltage (Vdrop
)
Indicates the difference between input voltage (VIN1) and the output voltage when; decreasing input voltage (VIN)
gradually until the output voltage has dropped out to the value of 98% of output voltage (VOUT3), which is at VIN
=
VOUT(S) + 1.0 V.
Vdrop = VIN1 − (VOUT3 × 0.98)
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