ULTRA LOW CURRENT CONSUMPTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1206 Series
Rev.1.1_00
Technical Terms
1. Low Dropout Voltage Regulator
The low dropout voltage regulator is a voltage regulator whose dropout voltage is low due to its built-in low-on-
resistance transistor.
2. Low Equivalent Series Resistance
A capacitor whose equivalent series resistance (RESR) 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 (CL).
3. Output Voltage (VOUT
)
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 VOUT < 1.5 V : 15 mV, When 1.5 V ≤ VOUT : 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.
∆VOUT1
IN
4. Line Regulation
∆V • 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 (∆VOUT2
)
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 (Vdrop
)
Indicates the difference between the input voltage (VIN1), which is the input voltage (VIN) at the point where the output
voltage has fallen to 98% of the output voltage value (VOUT3) after VIN was gradually decreased from VIN = VOUT(S)
1.0 V, and the output voltage at that point (VOUT3 × 0.98).
Vdrop = VIN1 − (VOUT3 × 0.98)
+
10
Seiko Instruments Inc.
SII [ SEIKO INSTRUMENTS INC ]
