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S-8521

Seiko Instruments
Part Number S-8521
Manufacturer Seiko Instruments
Description PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Published Jun 2, 2006
Detailed Description S-8520/8521 Series www.sii-ic.com STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER © SII...
Datasheet PDF File S-8521 PDF File

S-8521
S-8521

Overview
S-8520/8521 Series www.
sii-ic.
com STEP-DOWN, PWM CONTROL or PWM / PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER © SII Semiconductor Corporation, 1997-2010 Rev.
9.
0_01 The S-8520/8521 Series is a CMOS step-down switching regulator-controller with PWM control (S-8520 Series) and PWM / PFM switching control (S-8521 Series).
The S-8520/8521 Series has a reference voltage source, an oscillation circuit, an error amplifier, and other components.
The S-8520 Series provides low-ripple power, high efficiency, and excellent transient characteristics due to a PWM control circuit capable of varying the duty ratio linearly from 0% up to 100%.
The S-8520/8521 Series also has a soft-start circuit that ...


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