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PDF st2051 Data sheet ( Hoja de datos )
| Número de pieza | st2051 | |
| Descripción | Enhanced power switch | |
| Fabricantes | STMicroelectronics | |
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ST2051
Enhanced power switch
Features
■ 90mΩ high-side MOSFET switch
■ 500mA continuos current per channel
■ Thermal and short-circuit protection with
overcurrent logic output
www.Data■SheOept4eUr.actoinmg range from 2.7V to 5.5V
■ CMOS- and TTL-compatible enable inputs
■ 2.5ms typical rise time
■ Under voltage lock out
■ 10µA Maximum standby supply current
■ Ambient temperature range, 0°C to 85°C
■ 2kV ESD protection
■ Fault-blanking
Description
The ST2051 power distribution switch is intended
for applications where heavy capacitive loads and
short circuits are likely to be encountered. These
devices incorporate 90mΩ N-channel MOSFET
high-side power switches for power-distribution.
The switch is controlled by a logic enable input.
Gate drive is provided by an internal charge pump
designed to control the power-switch rise times
and fall times to minimize current surges during
switching. The charge pump requires no external
components and allows operation from supplies
as low as 2.7V.
SO-8
When the output load exceeds the current-limit
threshold or a short is present, the device limits
the output current to a safe level by switching into
a constant-current mode, pulling the overcurrent
logic output low. When continuous heavy
overloads and short circuits increase the power
dissipation in the switch, causing the junction
temperature to rise, a thermal protection circuit
shuts off the switch to prevent damage. Recovery
from a thermal shutdown is automatic once the
device has cooled sufficiently. Internal circuitry
ensures the switch remains off until valid input
voltage is present.
Order codes
Part number
ST2051BDR
August 2006
Package
SO-8
Rev1
Packaging
Tape and reel
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11
1 page  
ST2051
3 Electrical ratings
Electrical ratings
3.1 Absolute maximum ratings
Table 2. Absolute maximum ratings
Symbol
Parameter
www.DataSheet4U.com
VI
VO
Vienx
Io
ESD
TJ
TSTG
Input voltage range
Output voltage range
EN Input voltage range
Continuous output current
ESD protection level
Junction operating temperature
Storage temperature
Value
-0.3-6.0
-0.3-(Vi+0.3)
-0.3-6.0
Internally limited
2
-40 to 125
-55 to 150
Unit
V
V
V
kV
°C
°C
3.2 Recommended operating conditions
Table 3. Recommended operating conditions
Symbol
Parameter
VI Input voltage
VO Output voltage
IO Continuous output current
Min.
2.7
0
0
Typ.
5.0
5.0
-
Max.
5.5
5.5
500
Unit
V
V
mA
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5 Page 
ST2051
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| PDF Descargar | [ Datasheet st2051.PDF ] | |
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