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STEF4S 데이터시트 PDF




STMicroelectronics에서 제조한 전자 부품 STEF4S은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 STEF4S 기능
기능 Electronic fuse
제조업체 STMicroelectronics
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STEF4S 데이터시트, 핀배열, 회로
STEF4S
Electronic fuse for 3.3 V and 5 V lines
')1[/
Features
Power MOSFET on-resistance (typ.): 40 mΩ
Enable function
Output clamp voltage (typ.): 5.7 V in 5 V mode,
and 3.8 V in 3.3 V mode
Undervoltage lockout
Short-circuit limit
Overload foldback current limit
Controlled soft-start
Thermal auto-retry
Internal sensing FET
Operative temp. range: - 40 °C to 85 °C
Available in DFN 3x3 10L package
Description
The STEF4S is an integrated electronic fuse
optimized for monitoring the output current and
the input voltage. It can be connected in series to
3.3 V or 5 V rails, protecting the electronic
circuitry on its output from overcurrent and
overvoltage. The operating mode (5 V or 3.3 V)
can be selected by a dedicated pin. The STEF4S
has a controlled turn-on time, adjustable by an
external capacitor. When an overload condition
occurs the device limits the output current to a
Datasheet - production data
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,
the E-fuse limits the output current to a safe
value.
In case of overvoltage on the input, the device
clamps the output voltage to a predefined value
and protects the load.
If the anomalous fault condition pe rsists, the
internal thermal protection circuit shuts down the
device and then automatically attempts to re-
supply the load until the fault condition is
removed.
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.
Applications
Hard disk drives
Solid state drives (SSD)
Hard disk and SSD arrays
Set-top boxes
DVD and blu-ray disc drivers
Table 1. Device summary
Order code
Package
Packing
STEF4SPUR DFN 3x3 10L Tape and reel
October 2013
This is information on a product in full production.
DocID025259 Rev 1
1/21
www.st.com
21




STEF4S pdf, 반도체, 판매, 대치품
Pin configuration
2 Pin configuration
Figure 2. Pin configuration (top view)
STEF4S
9,1
9,1
9,1
9&3
*1'





*1'
 9287
 9287
 9287
 (1
 667
$09
Pin n°
1, 2, 3
4
5
6
7
8,9,10
EXP
Symbol
VIN
VCP
GND
SST
EN
VOUT
GND
Table 2. Pin description
Note
Input supply voltage pin
Voltage clamping and UVLO selection pin (high state 5 V, low state 3.3 V)
Ground pin (can be left floating if TAB is connected to GND)
Soft-start time selection pin. A capacitor can be connected between this pin and GND to
increase the startup time
Enable pin (active high)
Output voltage pin
Exposed pad is internally connected to GND
4/21 DocID025259 Rev 1

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STEF4S 전자부품, 판매, 대치품
STEF4S
Electrical characteristics
Symbol
Table 5. STEF4S electrical characteristics
Parameter
Test conditions
Min.
Total device
IBias Bias current
Vmin Minimum operating voltage
Thermal latch
TSD
Shutdown temperature
Hysteresis
ON state, VEN = VIN = 5 V
OFF state, VEN = GND, VIN = 5 V
Device is in OFF state (VOUT = 0)
2
1. Guaranteed by design, not tested in production.
Typ. Max. Unit
50 65
µA
15
V
140 °C
20
DocID025259 Rev 1
7/21

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부품번호상세설명 및 기능제조사
STEF4S

Electronic fuse

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