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Overview - S-8363 Series

STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz
PWM / PFM SWITCHABLE SWITCHING REGULATOR S-8363 Series

The S-8363 Series is a CMOS step-up switching regulator which consists of a referencevoltage 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.
The S-8363 Series is capable of start-up from 0.9 V (Iout = 1 mA) by the start-up circuit, and is suitable for applications which use one dry cell.
The output voltage is freely settable from 1.8 V to 5.0 V by external parts.
Ceramic capacitors can be used for output capacitor.
Small packages SNT-6A and SOT-23-6 enable high-density mounting.

DATA SHEET
2010.7.12

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
    • Small packages : SNT-6A, SOT-23-6
    • Lead-free product

Applications

    • MP3 players, digital audio players
    • Digital cameras, GPS, wireless transceiver
    • Portable devices