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The WD1305E20 is a high efficiency,500kHzswitch frequency,synchronous step-down DC-DC converter with delivering 2Acurrentcapability. The WD1305E20operates over a wideinput voltage range from 4.5V to 18V and integrates main switch and synchronous switch with very low RDS(ON)to minimize the conduction loss.

The WD1305E20appliesConstant-on-time(COT)controlmode whichprovides very fastloadtransient responseand easy loop design.The WD1305E20integratesfull protections features includingshort-circuit protection, over-current protection, under voltage protection and thermal shutdownto make the part operatingsafely.

The WD1305E20is availablein SOT-23-6L package. Standard product is Pb-free and Halogen-free.

- Set Top Box
- Access Point Router
- DSL Modem、Security Cameras 
- Flat-Panel Televisions and Monitors 


Wide input voltage range of 4.5V to 18V 

Integrate 140mΩ (High Side) / 110mΩ (Low Side)
Low RDS(ON) Power MOSFETs 

70μA Low Quiescent Current 

High-efficiency synchronous-mode Operation 

Power save mode at light load 

Fast load transient response with COT control mode 

Over-current protection and Hiccup 

Output adjustable from 0.6V 

Order Information
Ordering No. Vout(V) Package
WD1305E20-6/TR N/A SOT-23-6L