S-8363B-I6T1U2 Datasheet, PDF (1/50 Pages) Seiko Instruments Inc – PWM/PFM SWITCHABLE SWITCHING REGULATOR

S-8363 Series
www.sii-ic.com
STEP-UP, SUPER-SMALL PACKAGE, 1.2 MHz
PWM / PFM SWITCHABLE SWITCHING REGULATOR
© SII Semiconductor Corporation, 2010
Rev.2.0_01
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.
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.
 Features
• Low operation voltage
• Oscillation frequency
• Input voltage range
• Output current
• Reference voltage
• Efficiency
• Soft start function
• Low current consumption
• Duty ratio
• Power-off function
• Current limit circuit
• Nch power MOS FET ON resistance
• Start-up function
• Lead-free, Sn 100%, halogen-free^*1
: Start-up from 0.9 V (IOUT = 1 mA) guaranteed
: 1.2 MHz
: 0.9 V to 4.5 V
: 300 mA (VIN = 1.8 V, VOUT = 3.3 V)
: 0.6 V±2.5%
: 85%
: 1.2 ms typ.
: During switching-off, 95 μA typ.
: PWM / PFM switching control
max.88%
: Current consumption during power-off 3.0 μA max.
: limits the peak value of inductor current
: 0.25 Ω typ.
: Operation with fixed duty pulse under the VOUT voltage of 1.4 V or less
*1. Refer to “ Product Name Structure” for details.
 Applications
• MP3 players, digital audio players
• Digital cameras, GPS, wireless transceiver
• Portable devices
 Packages
• SNT-6A
• SOT-23-6
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