Features 
  8V ~ 40V Supply Voltage Range 
  45V Input Voltage Surge 
  42V Input Over Voltage Protection 
  3% Voltage Reference Accuracy 
  7% Constant Current Accuracy 
  Cycle by Cycle Current Limit 
  External Optional Current Limit Mode 
  Programmable Frequency（60KHz ~ 1
  Built in Adjustable Line-Compensation 
  Hiccup Short Circuit Protection 
  Duty Cycle Range (0~100%) 
  Internal Soft Start 3ms 
  CC/CV Mode Control 
  SOP-8L Package 

General Description 
The  SP1236FH  is a synchronous buck  Regulator  with 
output current to 3.1A. It is designed to allow for operating 
a wide supply voltage range from 8V to 40V. The internal 
compensation  requires  a minimum number  of readily 
available standard external components. 
The  SP1236FH  operates in the CC(Constant output 
Current) mode or CV(Constant output Voltage) mode, and 
the OCP current value is set by current sensing  power 
resisters or setting non power resisters.   
The SP1236FH is suitable for the DC/DC switching power 
applications  when requested the current limit function. 
The devices are available in SOP-8L package and require 
very few external devices for operation. 
 
Applications 
  Car Chargers   
  Portable Charger Devices   
  DC/DC Converters with Current Limit