The Infineon OPTIREG switcher is a 2.8 MHz synchronous step down regulator especially designed for automotive applications. The device has a current capability of 2 A, fixed 3.3 V output voltage and a feedback voltage accuracy of ±1.5% in PWM mode. The integrated power stages, soft-start feature and integrated compensation network reduce the required amount of external components and thus system costs and board space. The wide input voltage range and a 100% duty cycle operation mode make the device suitable for battery cranking scenarios in automotive applications. The wide switching frequency range allows the selection of appropriate coils and capacitors. The switching frequency can be synchronized to an external clock signal.

Integrated high side and low side power MOSFETs
Peak current mode PWM regulation
Light load PFM mode with improved efficiency
100% duty cycle operation
Synchronization input
Spread spectrum frequency modulation for improved EMI performance
Soft-start function
Integrated compensation network
Output discharge function in disabled state
Ultra low current consumption in disabled state