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ST1S14PHR Datasheet(PDF) 1 Page - STMicroelectronics |
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ST1S14PHR Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 46 page  This is information on a product in full production. March 2013 DocID17977 Rev 2 1/46 46 ST1S14 Up to 3 A step-down switching regulator Datasheet - production data 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 over temperature range • 250 mΩ typ. RDS(on) • Thermal shutdown Applications • Factory automation • Printers • DC-DC modules • High current LED drivers Description The ST1S14 is a step-down monolithic power switching regulator able to deliver up to 3 A DC current to the load depending on the application conditions. The high current level is also achieved thanks to a HSOP8 package with exposed frame, that allows to reduce the Rth(JA) down to approximately 40 °C/W. The output voltage can be set from 1.22 V. The device uses an internal N- channel DMOS transistor (with a typical RDS(on) of 200 m Ω) as the switching element to minimize the size of the external components. The internal oscillator fixes the switching frequency at 850 kHz. Power good open collector output validates the regulated output voltage as soon as it reaches the regulation. Pulse-by-pulse current limit offers an effective constant current short-circuit protection. Current foldback decreases overstress in a persistent short-circuit condition. Figure 1. Application schematic HSOP8 - exposed pad www.st.com |
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