General Description
The SY8286B develops a high efficiency synchronous
step-down DC/DC regulator with 3.3V fixed output
voltage and 6A current rating. The device integrates
main switch and synchronous switch with very low
RDS(ON) to minimize the conduction loss. The SY8286B
also integrates a 3.3V/100mA LDO with bypass switch
and individual enable control.
The SY8286B operates over a wide input voltage range
from 4V to 23V. The DC/DC regulator adopts the
instant PWM architecture to achieve fast transient
responses for high step down applications and high
efficiency at light loads. In addition, it operates at
pseudo-constant frequency of 600kHz under heavy
load conditions to minimize the size of inductor and
capacitor.

Features
 Low RDS(ON) for Internal Switches (Top/Bottom):
38/19 mΩ
 Wide Input Voltage Range: 4-23V
 3.3V LDO with Individual Enable Control and
Bypass Switch
 Integrated Bypass Switch: 1.5Ω
 Instant PWM Architecture to Achieve Fast
Transient Responses
 Internal 1.2ms Soft-start Limits the Inrush Current
 Pseudo-constant Frequency: 600kHz.
 6A Output Current Capability
 +/-1.5% Output Voltage Accuracy
 Power Good Indicator
 Output Discharge Function
 Output Current Limit Protection
 Short Circuit Latch-off Protection
 Output Over Voltage Latch-off Protection
 Input UVLO
 Over Temperature Protection
 RoHS Compliant and Halogen Free
 Compact Package: QFN3X3-20

Applications
 LCD-TV/Net-TV/3DTV
 Set Top Box
 Notebook
 High Power AP