ULTRA LOW CURRENT CONSUMPTION AND LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1206 Series
Rev.1.1_00
Precautions
• Wiring patterns for the VIN pin, VOUT pin and GND pin should be designed so that the impedance is low. When
mounting an output capacitor between the VOUT pin and VSS pin (CL) and a capacitor for stabilizing the input between
the VIN pin and VSS pin (CIN), the distance from the capacitors to these pins should be as short as possible.
• Note that the output voltage may generally increase when a series regulator is used at low load current (10 µA or less).
• Note that the output voltage may generally increase due to driver leakage when a series regulator is used at high
temperatures.
• Generally a series regulator may cause oscillation, depending on the selection of external parts. The following
conditions are recommended for this IC. However, be sure to perform sufficient evaluation under the actual usage
conditions for selection, including evaluation of temperature characteristics. For the equivalent series resistance
(RESR) of the output capacitor, refer to (5) Equivalent Series Resistance vs. Output Current Characteristics
Example (Ta = 25°C) in “ Reference Data”.
Input capacitor (CIN) :
Output capacitor (CL) :
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, the power supply fluctuation and load fluctuation characteristics become worse.
Sufficiently evaluate the output voltage fluctuation with the actual device.
• If the power supply suddenly increases sharply when the output capacitance is small, a momentary overshoot may be
output. It is therefore important to sufficiently evaluate the output voltage at power application in the actual device.
• The application conditions for the input voltage, output voltage, and 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.
14
Seiko Instruments Inc.
SII [ SEIKO INSTRUMENTS INC ]
