ST1S03| Datasheet

ST1S03, ST1S03PMR, ST1S03PUR

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ST1S03
1.5A, 1.5 MHz adjustable, step-down switching regulator in DFN6
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 50-100us 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 over an input voltage range of 3V to 16V. An high switching frequency (1.5MHz) allows the use of tiny surface-mount components: as well as the resistor divider to set the output voltage value, only an inductor, a schottky diode and two capacitors are required. Besides, a low output ripple is guaranteed by the current mode PWM topology and by the use of low E.S.R. SMD ceramic capacitors. The device is thermal protected and current limited to prevent damages due to accidental short circuit. The ST1S03 is available in DFN6.
DFN6 (3x3mm)

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. It provides up to 1.5A

Order codes
Part number ST1S03PM ST1S03PU March 2007 Packaging ST1S03PMR ST1S03PUR Rev. 5 Package DFN6 (3x3 mm) DFN6D (3x3 mm) 1/17
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