Current Mode Boost Controller


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The RT8525D is a wide input operating voltage range step up controller. High voltage output and large output current are feasible by using an external N-MOSFET. The RT8525D input operating range is from 4.5V to 25V.

The RT8525D is an optimized design for wide output voltage range applications. The output voltage of the RT8525D can be adjusted by the FB pin.


  • LCD TV, Monitor Display Backlight
  • LED Driver Application
  • High Current High Output Voltage DC/DC Converters
  • High Input Voltage DC/DC Converters
Key Spec.
Status Active
Vin (min) (V) 4.5
Vin (max) (V) 25
Iq (typ) (mA) 1.3
VFB (typ) (V) 1.25
Freq (typ) (kHz) 200
Duty (max) (%) 90
Features Adjustable Current Limit;Adjustable Frequency;Adjustable Soft-Start;Current Mode Control;Enable Input;OCP;OVP;Power Good;UVP
Package Type WDFN3x3-12
  • VIN Range : 4.5V to 25V
  • Programmable Soft-Start Time
  • Programmable Boost SW Frequency from 50kHz to 600kHz
  • Output Over Voltage Protection
  • Output Under Voltage Protection
  • 12-Lead WDFN Package
  • RoHS Compliant and Halogen Free
TitleLast UpdateShareDownload
Current Mode Boost Controller2012/04/30
Title Last Update ShareDownload
Current Mode Boost Controller 2015/05/19
Technical Documents
TitleLast UpdateShareDownload
Richtek Wide Input Voltage Range DC/DC Power Solutions for Industrial, Automotive and LED lighting applications2020/12/30
Richtek Selection Guide [Oct., 2020]2020/12/30
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT8525DGQWWDFN3x3-121500 Not available Buy from Distributor