Description
The FR8018 is a synchronous step-down DC/DC
converter that provides wide 4.5V to 23V input
voltage range and 4A continuous load current
capability. At light load condition, the FR8018 can
operate at PSM mode to support high efficiency and
reduce power loss.
The FR8018 fault protection includes cycle-by-cycle
current limit, UVLO and thermal shutdown.
Besides, adjustable soft-start or internal soft-start
function prevents inrush current at turn-on. This
device uses current mode control scheme which
provides fast transient response. Internal
compensation function reduces external
compensator components and simplifies the design
process. In shutdown mode, the supply current is
about 1μA.
The FR8018 is offered in SOP-8 (Exposed Pad)
package and provides good thermal conductance.

Features
 Low RDS(ON) Integrated Power MOSFET
 Internal Compensation Function
 Wide Input Voltage Range: 4.5V to 23V
 Adjustable Output Voltage Down to 0.765V
 4A Output Current
 Fixed 500kHz Switching Frequency
 External Programmable Soft-Start or Internal 1ms
Soft-Start
 PSM (High Efficiency at Light Load)
 Cycle-by-Cycle Current Limit
 Over-Temperature Protection with Auto Recovery
 Under Voltage Lockout
 <1μA Shutdown Current
 Hiccup Short Circuit Protection
 FB pin Floating Protection
 SOP-8 Exposed Pad Package
 RoHS Compliant

Applications
 LCD Display, TV
 STB (Set-Top-Box)
 Distributed Power System
 Networking, XDSL Modem