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ST2051BDR

P1-P3P4-P6P7-P9P10-P10
Functional descriptions ST2051
4/10 Doc ID 12593 Rev 3
3 Functional descriptions
3.1 Fault-blanking
ST devices feature a 10 ms fault-blanking. Fault-blanking allows current-limit faults,
including momentary short-circuit faults that occur when hot-swapping a capacitive load,
and also ensures that no fault is issued during power-up. When a load transient causes the
device to enter current limit, an internal counter starts. If the load fault persists beyond the
10 ms fault-blanking timeout, the FAULT output asserts low. Load-transient faults less than
10 ms (typical) will not cause a FAULT output assertion. Only current-limit faults are blanked.
Die overtemperature faults and input voltage drops below the undervoltage lock out (UVLO)
threshold will cause an immediate fault output.
3.2 Overcurrent/overtemperature protection
In overcurrent or short-circuit condition, the switch limits the current at 500 mA.
If temperature of die goes above limit value, the switch turns OFF.
3.3 Undervoltage lock out (UVLO)
When input voltage drops below critical value, the power switch turns OFF to prevent
improper operation due to low voltage.
Obsolete Product(s) - Obsolete Product(s)
ST2051 Maximum rating
Doc ID 12593 Rev 3 5/10
4 Maximum rating
Stressing the device above the rating listed in the “Absolute maximum ratings” table may
cause permanent damage to the device. These are stress ratings only, and operation of the
device at these or any other conditions above those indicated in the operating sections of
this specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect device reliability. Refer also to the STMicroelectronics™ SURE
program and other relevant quality documents.
Table 3. Absolute maximum ratings
Symbol Parameter Value Unit
V
I
Input voltage range -0.3-6.0 V
V
O
Output voltage range -0.3-(V
I
+0.3) V
V
IENX
EN Input voltage range -0.3-6.0 V
I
O
Continuous output current Internally limited
ESD ESD protection level 2 kV
T
J
Junction operating temperature -40 to 125 °C
T
STG
Storage temperature -55 to 150 °C
Table 4. Recommended operating conditions
Symbol Parameter Min Typ Max Unit
V
I
Input voltage 2.7 5.0 5.5 V
V
O
Output voltage 0 5.0 5.5 V
I
O
Continuous output current 0 - 500 mA
Obsolete Product(s) - Obsolete Product(s)
Electrical characteristics ST2051
6/10 Doc ID 12593 Rev 3
5 Electrical characteristics
Table 5. Electrical characteristics (T
J
= 25 °C, V
I
= 5.0 V)
Symbol Parameter Test conditions Min Typ Max Unit
R
DS(on)
Static drain-source
on-state resistance
V
I
= 3.3 V;
-40 < T
J
< 125 °C
100 145
mΩ
V
I
= 5.0 V;
-40 < T
J
< 125 °C
90 135
V
I
= 3.3 V;
T
J
= 25 °C
90 130
V
I
= 5.0 V;
T
J
= 25 °C
80 110
t
r
Output rise time
(1)
1. Not tested in production, specified by design
V
I
= 5.5 V,
R
L
= 10 Ω,
C
L
= 1 μF
2.5 ms
V
I
= 2.7 V,
R
L
= 10 Ω,
C
L
= 1 μF
3ms
t
f
Output fall time
(1)
V
I
= 5.5 V,
R
L
= 10 Ω,
C
L
= 1 μF
0.3 ms
V
I
= 2.7 V,
R
L
= 10 Ω,
C
L
= 1 μF
0.2 ms
T
ON
Turn-ON ti me
(1)
R
L
= 10 Ω,
C
L
= 100 μF
20 ms
T
OFF
Turn-OFF time
(1)
R
L
= 10 Ω,
C
L
= 100 μF
40 ms
Table 6. Current limit characteristics
(V
I
= 5.5 V, I
O
= rated current, T
J
= 25 °C, unless otherwise specified)
Symbol Parameter Test conditions Min Typ Max Unit
I
OS
Short-circuit output
current
V
I
= 5 V, OUT connected to
GND, device enabled into
short-circuit
0.7 1.0 1.3 A
Obsolete Product(s) - Obsolete Product(s)
P1-P3P4-P6P7-P9P10-P10

ST2051BDR

Mfr. #:
Buy ST2051BDR
Manufacturer:
STMicroelectronics
Description:
IC DISTRIBUTION SWITCH ASD 8SOIC
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