S-814 SII [Seiko Instruments Inc], S-814 Datasheet - Page 14

• Manufacturer Part Number: S-814
• Description: LOW DROPOUT CMOS VOLTAGE REGULATOR
• Manufacturer: SII [Seiko Instruments Inc]

14
LOW DROPOUT CMOS VOLTAGE REGULATOR
S-814 Series
• Wiring patterns for VIN pin, VOUT pin and GND pin should be designed so that the impedance is low.
• Note that output voltage may increase when a series regulator is used at low load current (Less than 10
• Generally, a series regulator may cause oscillation, depending on the selection of external parts. The
• The voltage regulator may oscillate when the impedance of the power supply is high and the input
• The application conditions for input voltage and load current do not exceed the power dissipation level of
• In determining the output current, attention should be paid to the output current value specified and
• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in
• SII claims no responsibility for any and all disputes arising out of or in connection with any infringement by
Selection of Output Capacitor (C
Precautions
When mounting an output capacitor, the distance from the capacitor to the VOUT pin and the VSS pin
should be as short as possible.
μA).
following conditions are recommended for this IC. However, be sure to perform sufficient evaluation under
the actual usage conditions to select the series regulator.
capacitor is small or an input capacitor is not connected.
the package.
footnote *3 in Table 5 in the “ Electrical Characteristics”.
electrostatic protection circuit.
products including this IC of patents owned by a third party.
Mount an output capacitor between VOUT pin and VSS pin for phase compensation. The S-814 Series
enables customers to use a ceramic capacitor as well as a tantalum or an aluminum electrolytic capacitor.
Pay special attention not to cause an oscillation due to an increase in ESR at low temperatures, when
you use the aluminum electrolytic capacitor.
performance including temperature characteristics.
Overshoot and undershoot characteristics differ depending upon the type of the output capacitor you
select. Refer to “C
“ Transient Response Characteristics”.
Output capacitor (C
Equivalent Series Resistance (ESR): 10 Ω or less
Input series resistance (R
• A ceramic capacitor or an OS capacitor:
• A tantalum or an aluminum electrolytic capacitor:
Use a capacitor of 0.47 μF or more.
Use a capacitor of 0.47 μF or more and ESR of 10 Ω or less.
L
dependencies of overshoot” and “C
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):
IN
):
Seiko Instruments Inc.
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)
0.47 μF or more
10 Ω or less
Evaluate the capacitor taking into consideration its
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dependencies of undershoot” in
Rev.2.1
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