STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz PWM / PFM SWITCHABLE SWITCHING REGULATOR

The S-8363 Series is a CMOS step-up switching regulator which consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a current limit circuit, and a start-up circuit.

Due to the operation of the PWM / PFM switching control, pulses are skipped under the light load operation and the S-8363 Series prevents decrease in efficiency caused by IC’s operating current.

Features

• Low operation voltage : Start-up from 0.9 V (IOUT = 1 mA) guaranteed

• Oscillation frequency : 1.2 MHz

• Input voltage range : 0.9 V to 4.5 V

• Output current : 300 mA (VIN = 1.8 V, VOUT = 3.3 V)

• Reference voltage : 0.6 V±2.5

• Efficiency : 85

• Soft start function : 1.2 ms typ.

• Low current consumption : During switching-off, 95 μA typ.

• Duty ratio : PWM / PFM switching control max.88

• Power-off function : Current consumption during power-off 3.0 μA max.

• Current limit circuit : limits the peak value of inductor current

• Nch power MOS FET ON resistance : 0.25 Ω typ.

• Start-up function : Operation with fixed duty pulse under the VOUT voltage of 1.4 V or less

• Lead-free, Sn 100, halogen-free*1

Applications

• MP3 players, digital audio players

• Digital cameras, GPS, wireless transceiver

• Portable devices