Description
The ST1S03 is a step down DC-DC converter optimized for powering low-voltage digital core in HDD applications and, generally, to replace the high current linear solution when the power dissipation may cause an high heating of the application environment.

Features
■ Step-down current mode PWM (1.5MHz) DC-DC converter
■ 2% DC output voltage tolerance
■ Internal soft start for START-UP current limitation and power on delay of 50-100µs
■ Typical efficiency: > 70% over all operating conditions
■ 1.5A Output current capability
■ Not switching quiescent current: max 2.5mA over temperature range
■ Switch VDS: max 350mV @ ISW=750mA
■ Uses tiny capacitors and inductors
■ Available in DFN 3x3 exposed pad