HA16666P

·  High-speed switching;
      tr = 80 ns (15 V amplitude)
      tf = 40 ns (15 V amplitude)
·  Low power dissipation;
      0.3 mA max in standby state
      12 mA max in operation state (V_IN = 15 V)
·  Dual-slope highly accurate dead-band duty setup circuit; Setup accuracy Du = ±3% (max)
·  Wide output pulse width control range; 0 to 75% 
·  Undervoltage lockout protection;
      V_IN high threshold voltage 10 V typ
      V_IN low threshold voltage 8 V typ
·  Two input threshold voltage for overcurrent protection cmparator;fixed voltage (1.3 V) variable voltage
·  Double pulse output protection by overcurrent protection circuit with one-pulse latch mode
·  Wide input supply voltage range; V_CC = 11 to 40 V

The HA16666P/FP is a voltage mode PWM (pulse width modulation) control IC for switching regulator control. It can drive a power MOS FET efficiently on 600 kHz. Its stanby current is 0.3 mA (max), and it is used as the primary control power supply.