S-8353A20MC-IQFT2X Datasheet, PDF (24/49 Pages) Seiko Instruments Inc – BUILT-IN TRANSISTOR SWITCHING REGULATOR

STEP-UP, PWM CONTROL or PWM / PFM SWITCHABLE BUILT-IN TRANSISTOR SWITCHING REGULATOR
S-8353/8354 Series
Rev.3.0_01
 Precautions
• Mount external capacitors, diodes, and coils as close as possible to the IC. Especially, mounting the output capacitor
(capacitor between VDD pin and VSS pin for VDD / VOUT separate type) in the power supply line of the IC close to the IC
can enable stable output characteristics. If it is impossible, it is recommended to mount and wire a ceramic capacitor
of around 0.1 μF close to the IC.
• Characteristics ripple voltage and spike noise occur in IC containing switching regulators. Moreover rush current flows
at the time of a power supply injection. Because these largely depend on the coil, the capacitor and impedance of
power supply used, fully check them using an actually mounted model.
• Make sure that the dissipation of the switching transistor (especially at a high temperature) does not exceed the
allowable power dissipation of the package.
• The performance of this IC varies depending on the design of the PCB patterns, peripheral circuits and external parts.
Thoroughly test all settings with your device. The recommended external part should be used wherever possible, but if
this is not possible for some reason, contact an SII Semiconductor Corporation sales person.
• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
protection circuit.
• SII Semiconductor Corporation claims no responsibility for any and all disputes arising out of or in connection with any
infringement of the products including this IC upon patents owned a third party.
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