Overview

The RK860 is a high efficiency 2.4MHz synchronous step down DC/DC regulator IC capable of

delivering up to 7A output current. It can operate over a wide input voltage range from 2.7V

to 5.5V. And, it integrates a main switch and a synchronous switch with both very low RDS (ON)

to minimize the conduction loss. The output voltage can be programmed from 0.7125V to 1.5V

with 12.5mV/step or 0. 5V to 1.5V with 6.25mV/step through I2C interface.

The RK860 is in a space saving, low profile WLCSP 1.65mm*2.05mm-20 package.

Feature

 Input voltage range：2.7V-5.5V

 2.4MHz switching frequency minimizes the external components

 Typical 70uA quiescent current when VIN=3.8V and Temp=25℃

 Low RDs(ON) for internal switches(PFET/NFET):24mohm/16ohm @ VIN=3.8V

 Programmable output voltage:0.7125V to 1.5V with 12.5mV/step or 0.5V to 1.5V

with 6.25mV/step

 7A continuous output current capability

 Capable for 0.24uH inductor and 22uF*2 ceramic capacitor

 Hic-cup mode protection for hard short condition

 Integrate inner protection：Cycle by cycle OCP and VIN-OVP/UVLO/DIE-TSD

 RoHS compliant and Halogen free

 Compact package: WLCSP 1.65*2.05-20