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S-8533A60AFT-TB-U Datasheet(PDF) 1 Page - Seiko Instruments Inc |
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S-8533A60AFT-TB-U Datasheet(HTML) 1 Page - Seiko Instruments Inc |
1 / 33 page S-8533 Series www.sii-ic.com STEP-DOWN, SYNCHRONOUS PWM CONTROL SWITCHING REGULATOR CONTROLLER © SII Semiconductor Corporation, 2002-2010 Rev.3.0_01 1 The S-8533 Series is a synchronous PWM control CMOS step-down switching regulator controller that includes a reference voltage source, synchronous circuit, oscillation circuit, error amplifier, phase compensation circuit, and PWM controller. An efficient step-down switching regulator can be realized simply by adding external P-channel and N-channel power MOS FETs, one coil, and three capacitors. Since the oscillation frequency is a high 300 kHz, the S-8533 can be used to configure a high efficiency step-down switching regulator capable of driving high output current using small external parts and a 3 to 10% increase in efficiency is obtained compared to conventional step-down switching regulators. The 8-Pin TSSOP package and high oscillation frequency make the S-8533 ideal as the main power supply for portable devices. Features • Synchronous rectification system realizing high efficiency (typ. 94%) • Use at maximum duty ratio = 100% and use of a battery up to maximum life is possible by using P-channel and N- channel power MOS FETs externally. • Oscillation frequency : 300 kHz typ. • Input voltage : 2.7 to 16.0 V • Output voltage : 1.25 V 1.3 to 6.0 V, selectable in 0.1 V steps • Output voltage accuracy : ±2.0% • Soft-start function set by an external capacitor (CSS) • Shutdown function • Lead-free, Sn 100%, halogen-free*1 *1. Refer to “ Product Name Structure” for details. Applications • Constant voltage power supply for hard disks and DVD drivers • Power supplies for portable devices, such as digital cameras, PDAs, electronic organizers, and cellular phones • Main or sub power supply for notebook PCs and peripherals • Constant voltage power supply for cameras, video equipment, and communication equipment Package • 8-Pin TSSOP |
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