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ST1S14 Datasheet PDF - STMicroelectronics

Part Number ST1S14
Description Up to 3A step-down switching regulator
Manufacturers STMicroelectronics 
Logo STMicroelectronics Logo 

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ST1S14 datasheet, circuit
ST1S14
Up to 3 A step-down switching regulator
Datasheet - production data
HS+O6P283- exHp[SoRsVeHdGSpDaGd
Applications
Factory automation
Printers
DC-DC modules
High current LED drivers
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
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 mΩ) 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
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March 2013
This is information on a product in full production.
DocID17977 Rev 2
1/46
www.st.com
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ST1S14 equivalent
ST1S14
List of figure
Figure 46.
Figure 47.
Figure 48.
Figure 49.
Figure 50.
Figure 51.
Zoom - 1 A to 3 A rising edge load transient (VIN 24 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Zoom - 1 A to 3 A falling edge load transient (VIN 24 V). . . . . . . . . . . . . . . . . . . . . . . . . . . 41
1 A to 3 A load transient (VIN 32 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Zoom - 1 A to 3 A rising edge load transient (VIN 32 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Zoom - 1 A to 3 A falling edge load transient (VIN 32 V). . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Package dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
DocID17977 Rev 2
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Information Total 30 Pages
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