ABLIC S-8533A30AFT-TB-G

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.

• 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 Nchannel 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

• 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