S1206 Datasheet, PDF (10/35 Pages) Seiko Instruments Inc – ULTRA LOW CURRENT CONSUMPTION AND

ULTRA LOW CURRENT CONSUMPTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1206 Series
Rev.3.2_00
 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. Low Equivalent Series Resistance
A capacitor whose equivalent series resistance (R_ESR) is low. The S-1206 Series enables use of a low equivalent
series resistance capacitor, such as a ceramic capacitor, for the output-side capacitor (C_L).
3. Output Voltage (V_OUT)
The accuracy of the output voltage is ensured at ±1.0% or ±15 mV^*2 under the specified conditions of fixed input
voltage^*1, fixed output current, and fixed temperature.
*1. Differs depending on the product.
*2. When V_OUT < 1.5 V : ±15 mV, When 1.5 V ≤ V_OUT : ±1.0%
Caution If the above conditions change, the output voltage value may vary and exceed the accuracy range
of the output voltage. Refer to the “ Electrical Characteristics” and “ Characteristics (Typical
Data)” for details.
4. Line Regulation _ ^ΔVOUT1 _
  ^{ΔVIN • VOUT}
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.
5. Load Regulation (ΔV_OUT2)
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.
6. Dropout Voltage (V_drop)
Indicates the difference between input voltage (V_IN1) and the output voltage when; decreasing input voltage (V_IN)
gradually until the output voltage has dropped out to the value of 98% of output voltage (V_OUT3), which is at V_IN =
V_OUT(S) + 1.0 V.
V_drop = V_IN1 − (V_OUT3 × 0.98)
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Seiko Instruments Inc.