ULTRA LOW CURRENT CONSUMPTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR

S-1206 Series

Seiko Instruments Inc.

13



Precautions

• Wiring patterns for the VIN pin, the VOUT pin and GND should be designed so that the impedance is low. When

possible.

• Note that generally the output voltage may increase when a series regulator is used at low load current (10 μA or less).

• Note that generally the output voltage may increase due to the leakage current from an output driver when a series

regulator is used at high temperature.

• Generally a series regulator may cause oscillation, depending on the selection of external parts. The following

conditions are recommended for the S-1206 Series. However, be sure to perform sufficient evaluation under the

actual usage conditions for selection, including evaluation of temperature characteristics. Refer to “5. Equivalent

Series Resistance vs. Output Current Characteristics Example (Ta = 25

°C)” in “ Reference Data” for the

0.1

μF or more

0.1

μF or more

Use an I/O capacitor with good temperature characteristics (conforming to the ceramic capacitor EIA X5R (JIS B)

characteristics).

• The voltage regulator may oscillate when the impedance of the power supply is high and the input capacitance is small

or an input capacitor is not connected.

• If the output capacitance is small, power supply's fluctuation and the characteristics of load fluctuation become worse.

Sufficiently evaluate the output voltage's fluctuation with the actual device.

• Overshoot may occur in the output voltage momentarily if the voltage is rapidly raised at power-on or when the power

supply fluctuates. Sufficiently evaluate the output voltage at power-on with the actual device.

• The application conditions for the input voltage, the output voltage, and the load current should not exceed the package

power dissipation.

• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic

protection circuit.

• In determining the output current, attention should be paid to the output current value specified in Table 6 in “

Electrical Characteristics

” and footnote *5 of the table.

• SII claims no responsibility for any disputes arising out of or in connection with any infringement by products including

this IC of patents owned by a third party.