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STEF05PUR Scheda tecnica(PDF) 1 Page - STMicroelectronics

Il numero della parte STEF05PUR
Spiegazioni elettronici  Electronic fuse for 5 V line
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STEF05PUR Scheda tecnica(HTML) 1 Page - STMicroelectronics

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This is information on a product in full production.
March 2012
Doc ID 019055 Rev 4
1/20
20
STEF05
Electronic fuse for 5 V line
Datasheet
production data
Features
Continuous current (typ): 3.6 A
N-channel on-resistance (typ): 40 m
Ω
Enable/Fault functions
Output clamp voltage (typ): 6.65 V
Undervoltage lockout
Short-circuit limit
Overload current limit
Controlled output voltage ramp
Thermal latch (typ): 165 °C
Uses tiny capacitors
Operating junction temp. - 40 °C to 125 °C
Available in DFN10 (3x3 mm) package
Applications
Hard disk drives
Solid state drives (SSD)
Hard disk and SSD arrays
Set-top boxes
DVD and Blu-ray disc drivers
Description
The STEF05 is an integrated electronic fuse
optimized for monitoring output current and input
voltage. Connected in series to a 5 V rail, it is
capable of protecting the electronic circuitry on its
output from overcurrent and overvoltage. The
device has a controlled delay and turn-on time.
When an overload condition occurs, the STEF05
limits the output current to a predefined safe
value. If the anomalous overload condition
persists, it goes into an open state, disconnecting
the load from the power supply. If a continuous
short-circuit is present on the board, when power
is re-applied the E-fuse initially limits the output
current to a safe value, and then again goes into
an open state. The device is equipped with a
thermal protection circuit. The intervention of the
thermal protection is signalled to the board
monitoring circuits through a signal on the Fault
pin. Unlike mechanical fuses, which must be
physically replaced after a single event, the E-
fuse does not degrade in its performance after
short-circuit/thermal protection interventions and
it is reset either by recycling the supply voltage or
using the Enable pin. The companion chip for
12 V power rails is also available with part number
STEF12.
DFN10 (3x3 mm)
Table 1.
Device summary
Order code
Package
Packaging
STEF05PUR
DFN10 (3x3 mm)
Tape and reel
www.st.com


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