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WD10721 is a synchronous Buck DC-DC converters optimized for high efficiency and compact solution size. The device integrates switches capable of delivering an output current up to 2A. At PWM mode, the device operates in quasi fixed frequency constant on time mode with 2.1 MHz switching frequency. In shutdown, the current consumption is reduced to less than 2 μA.

An internal soft start circuit limits the inrush current during startup. Other features like over current protection, and thermal shutdown protection are built-in.

The WD10721 is available in SOT-563 package. Standard product is Pb-free and Halogen-free.

- General Purpose POL Supply
- Set Top Box
- Network Video Camera
- Wireless Router
- Solid State Driver / Hard Disk Driver
- Smartphone


Input Voltage Range of 2.5V to 5.5V

Power Saving Mode at Light Load

Up to 95% Efficiency

Integrate 125 mΩ (High Side) / 65 mΩ (Low Side) Low RDS (ON) Power MOSFETs

Adjustable Output Voltage from 0.6V to VIN

100% Duty Cycle for Lowest Dropout

2.1 MHz Typical Switching Frequency

240 μS Fast Turn on Time

4 mS Fast Output Discharge Time

Hiccup Mode Over-current Protection

Thermal Shutdown Protection

Order Information
Ordering No. Vout(V) Package
WD10721V-6/TR NA SOT-563