s-8521b51mc-aukt2g Seiko Instruments Inc., s-8521b51mc-aukt2g Datasheet - Page 22

• Manufacturer Part Number: s-8521b51mc-aukt2g
• Description: Step-down, Pwm Control Or Pwm / Pfm Switchable Switching Regulator Controller
• Manufacturer: Seiko Instruments Inc.

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STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLOR
S-8520 / 8521 Series
Precautions
• Mount the external capacitors, the diode and the coil as close as possible to the IC, and secure grounding
• Characteristics ripple voltage and spike noise occur in IC containing switching regulators. Moreover, rush
• The overload protection circuit of this IC performs the protective function by detecting the maximum duty
• Make sure that dissipation of the switching transistor (especially at a high temperature) does not exceed
• 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 of
at a single location.
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.
time (100 %). In choosing the components, make sure that over currents generated by short-circuits in
the load, etc., will not surpass the allowable dissipation of the switching transistor and inductor.
the allowable dissipation of the package.
electrostatic protection circuit.
the products including this IC upon patents owned by a third party.
Seiko Instruments Inc.
Rev.8.3
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