Description：

The ST1S14 is a step-down monolithic powerswitching regulator able to deliver up to 3 A DCcurrent to the load depending on the applicationconditions. The high current level is also achievedthanks to a HSOP8 package with exposed frame,that allows to reduce the Rth(JA) down toapproximately 40 °C/W. The output voltage canbe set from 1.22 V. The device uses an internal Nchannel DMOS transistor (with a typical RDS(on) of200 mΩ) as the switching element to minimize thesize of the external components. The internaloscillator fixes the switching frequency at 850kHz. Power good open collector output validatesthe regulated output voltage as soon as it reachesthe regulation. Pulse-by-pulse current limit offersan effective constant current short-circuitprotection. Current foldback decreases overstressin a persistent short-circuit condition.

Features：

• 3 A DC output current

• Operating input voltage from 5.5 V to 48 V

• 850 kHz internally fixed switching frequency

• Internal soft-start

• Power good open collector output

• Current mode architecture

• Embedded compensation network

• Zero load current operation

• Internal current limiting

• Inhibit for zero current consumption

• 2 mA maximum quiescent current overtemperature range

• 250 mΩ typ. RDS(on)

• Thermal shutdown

Applications：

• Factory automation

• Printers

• DC-DC modules

• High current LED drivers