STMPS2272MTR - STMicroelectronics

STMPS2242, STMPS2252
STMPS2262, STMPS2272
Enhanced dual-channel power switches
Features
■
100 mΩ high-side MOSFET switch
■
500 mA/1000 mA continuous current per
channel
■
Thermal protection
■
Independent short-circuit protection with
overcurrent logic output
■
Operating range from 2.7 V to 5.5 V
■
CMOS and TTL compatible inputs
■
2.5 ms typical rise time
■
Undervoltage lockout
■
13 µA maximum standby supply current
■
Ambient temperature range: -40 °C to 85 °C
■
8 kV ESD protection
■
Reverse current protection
■
Fault blanking
SO-8
MSOP8
Each switch is controlled by an independent logic
enable input. When the output load exceeds the
current limit threshold or a short is present, these
devices limit the output current to a safe level by
switching into a constant current mode, pulling the
overcurrent (OCx) 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.
Description
The STMPS2242/2252/2262/2272 power
distribution switches are intended for applications
where heavy capacitive loads and short-circuits
are likely to be encountered. These devices
incorporate 100 mΩ MOSFET high-side power
switches for power distribution systems that
require multiple power switches in a single
package.
Table 1.
Device summary
Order code
Current limit
Enable
Packing
500
Active low
Tape and reel
STMPS2252TTR
500
Active high
Tape and reel
STMPS2262MTR
STMPS2262TTR
1000
Active low
Tape and reel
STMPS2272MTR
STMPS2272TTR
1000
Active high
Tape and reel
SO-8
MSOP8(1)
(mA)
STMPS2242MTR
STMPS2242TTR
STMPS2252MTR
1. MSOP8 is also known as TSSOP8.
January 2011
Doc ID 15050 Rev 3
1/42
www.st.com
42
Contents
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Contents
1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2
Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4
3.1
Fault blanking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2
Overcurrent/overtemperature protection . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3
Reverse current blocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4
UVLO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1
Absolute maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2
Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5
Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6
Typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.1
6.2
7
2/42
6.1.1
Turn-on/off characteristics for VI = 3 V, RLOAD = 6 Ω . . . . . . . . . . . . . . . 13
6.1.2
Turn-on/off characteristics for VI = 5 V, RLOAD = 10 Ω . . . . . . . . . . . . . . 16
6.1.3
UVLO characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1.4
Overcurrent protection characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.1.5
Other electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
STMPS2262, STMPS2272 characteristics . . . . . . . . . . . . . . . . . . . . . . . . 24
6.2.1
Turn-on/off characteristics for VI = 3 V, RLOAD = 3 Ω . . . . . . . . . . . . . . . 24
6.2.2
Turn-on/off characteristics for VI = 5 V, RLOAD = 5 Ω . . . . . . . . . . . . . . . 27
6.2.3
UVLO characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.2.4
Overcurrent protection characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.2.5
Other electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.1
8
STMPS2242, STMPS2252 characteristics . . . . . . . . . . . . . . . . . . . . . . . . 13
Input and output capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Doc ID 15050 Rev 3
STMPS2242, STMPS2252, STMPS2262, STMPS2272
9
Contents
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Doc ID 15050 Rev 3
3/42
List of tables
STMPS2242, STMPS2252, STMPS2262, STMPS2272
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
4/42
Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Current limit characteristics
(VI = 5.5 V, IO = rated current, TJ = 25°C, unless otherwise specified) . . . . . . . . . . . . . . . 10
Supply current characteristics
(VI = 5.5 V, IO = rated current, TJ = 25°C, unless otherwise specified) . . . . . . . . . . . . . . . 11
Thermal characteristics
(VI = 5.5 V, IO = rated current, TJ = 25°C, unless otherwise specified) . . . . . . . . . . . . . . . 11
UVLO characteristics
(VI = 5.5 V, IO = rated current, TJ = 25°C, unless otherwise specified) . . . . . . . . . . . . . . . 12
OCx pin characteristics
(VI = 5.5 V, IO = rated current, TJ = 25°C, unless otherwise specified) . . . . . . . . . . . . . . . 12
ENx pin characteristics
(VI = 5.5 V, IO = rated current, TJ = 25°C, unless otherwise specified) . . . . . . . . . . . . . . . 12
SO-8 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
MSOP8 mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Reel mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Doc ID 15050 Rev 3
STMPS2242, STMPS2252, STMPS2262, STMPS2272
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Figure 26.
Figure 27.
Figure 28.
Figure 29.
Figure 30.
Figure 31.
Figure 32.
Figure 33.
Figure 34.
Figure 35.
Figure 36.
Figure 37.
Figure 38.
Figure 39.
Figure 40.
Figure 41.
Figure 42.
Figure 43.
Figure 44.
Figure 45.
Figure 46.
Figure 47.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Turn-on for CLOAD = 1 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Turn-on for CLOAD = 100 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Turn-on for CLOAD = 470 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Turn-off for CLOAD = 1 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Turn-off for CLOAD = 100 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Turn-off for CLOAD = 470 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Turn-on for CLOAD = 1 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Turn-on for CLOAD = 100 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Turn-on for CLOAD = 470 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Turn-off for CLOAD = 1 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Turn-off for CLOAD = 100 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Turn-off for CLOAD = 470 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
UVLO, VI rising . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
UVLO, VI falling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Overcurrent protection characteristics, VI = 3 V, RLOAD = 2.2 Ω . . . . . . . . . . . . . . . . . . . . 21
Overcurrent protection characteristics, VI = 5 V, RLOAD = 2.2 Ω . . . . . . . . . . . . . . . . . . . . 21
ICC versus VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
tr versus VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
tf versus VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Rds(on) versus VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Turn-on for CLOAD = 1 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Turn-on for CLOAD = 100 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Turn-on for CLOAD = 470 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Turn-off for CLOAD = 1 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Turn-off for CLOAD = 100 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Turn-off for CLOAD = 470 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Turn-on for CLOAD = 1 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Turn-on for CLOAD = 100 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Turn-on for CLOAD = 470 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Turn-off for CLOAD = 1 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Turn-off for CLOAD = 100 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Turn-off for CLOAD = 470 µF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
UVLO, VI rising . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
UVLO, VI falling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Overcurrent protection characteristics, VI = 3 V, RLOAD = 1 Ω . . . . . . . . . . . . . . . . . . . . . . 32
Overcurrent protection characteristics, VI = 5 V, RLOAD = 1 Ω . . . . . . . . . . . . . . . . . . . . . . 32
ICC versus VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
tr versus VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
tf versus VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Rds(on) versus VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
SO-8 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
MSOP8 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
SO-8 carrier tape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
MSOP8 carrier tape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Reel information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Doc ID 15050 Rev 3
5/42
Block diagram
1
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Block diagram
Figure 1.
Block diagram
/54
).
#URRENT
SENSE
%.
$RIVER
/#
56,/
4HERMAL
SENSE
&AULTBLANKINGREPORTING
DRIVERCONTROLUNIT
/#
#URRENT
SENSE
%.
/54
$RIVER
!-6
6/42
Doc ID 15050 Rev 3
STMPS2242, STMPS2252, STMPS2262, STMPS2272
2
Pin descriptions
Pin descriptions
Figure 2.
Table 2.
Pinout
GND
1
8
OC1
IN
2
7
OUT1
EN1
3
6
OUT2
EN2
4
5
OC2
Pin descriptions
Pin number
Name
Type
Function
1
GND
2
IN
−
−
3
EN1/EN1
I
Channel 1 active low (STMPS2242 and STMPS2262)
or active high (STMPS2252 and STMPS2272) enable
4
EN2/EN2
I
Channel 2 active low (STMPS2242 and STMPS2262)
or active high (STMPS2252 and STMPS2272) enable
5
OC2
O
Open drain output for fault indication of channel 2
6
OUT2
7
OUT1
−
−
8
OC1
O
Ground
VCC input, 2.7 - 5.5 V
Output of channel 2
Output of channel 1
Open drain output for fault indication of channel 1
Doc ID 15050 Rev 3
7/42
Functional description
STMPS2242, STMPS2252, STMPS2262, STMPS2272
3
Functional description
3.1
Fault blanking
The STMPS 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 (typ.) do not cause a FAULT output assertion. Only current-limit faults have faultblanking. Die overtemperature faults and input voltage drops below the UVLO threshold
cause an immediate fault output.
3.2
Overcurrent/overtemperature protection
In overcurrent or short-circuit condition, the switch limits the current at 500 mA for
STMPS2242/STMPS2252 and 1000 mA for STMPS2262/STMPS2272. If the temperature
of the die goes above the limit value, the switch turns OFF.
3.3
Reverse current blocking
When the switch is OFF, or when the STMPS device is not powered (VCC=0 V), the switch
behaves as a Hi-Z at the output pin, ensuring that no reverse current will flow into the device
when VI<VO.
Note:
In the case where the switch is ON, and a voltage higher than VI is applied to the OUT pin, a
reverse current will occur.
3.4
UVLO
When the input voltage drops below the threshold value, the power switch turns OFF to
prevent improper operation due to low voltage.
8/42
Doc ID 15050 Rev 3
STMPS2242, STMPS2252, STMPS2262, STMPS2272
4
Maximum rating
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.
4.1
Absolute maximum rating
Table 3.
Absolute maximum ratings
Symbol
VI
Input voltage range
VO
Output voltage range
VIENx
IO
ESD
TJ
TSTG
4.2
Parameter
EN input voltage range
Continuous output current
Value
Unit
–0.3 – 6.0
V
–0.3 – (VI +0.3)
V
–0.3 – 6.0
V
Internally limited
ESD protection level
8
kV
Junction operating temperature
–40 to 125
°C
Storage temperature
–55 to 150
°C
TR
Thermal resistance (MSOP8)
220
°C/W
TR
Thermal resistance (SO-8)
160
°C/W
Recommended operating conditions
Table 4.
Recommended operating conditions
Value
Symbol
Parameter
Unit
Min
Typ
Max
2.7
5.0
5.5
V
VI
Input voltage
VO
Output voltage
0
5.0
5.5
V
IO
(STMPS2242
STMPS2252)
Continuous output current
0
-
500
mA
IO
(STMPS2262
STMPS2272)
Continuous output current
0
-
1000
mA
Doc ID 15050 Rev 3
9/42
Electrical specifications
5
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Electrical specifications
Table 5.
Electrical characteristics
Value
Symbol
Parameter
Test conditions
Unit
Min
Rds(on)
Rds(on)
tr
tf
Static drain source
ON state resistance
Static drain source
ON state resistance
Max
VI = 2.7 V
TJ = 25°C
120
160
mΩ
VI = 5.0 V
TJ = 25°C;
105
115
mΩ
VI = 2.7 V
-40 < TJ < 125°C
200
VI = 5.0 V
-40 < TJ < 125°C
140
mΩ
VI = 5.0 V
Output rise time
RLOAD = 10 Ω
(STMPS2242,STMPS2252)
CLOAD = 1 µF
0.05
2
ms
VI = 5.0 V
Output rise time
RLOAD = 10 Ω
(STMPS2262,STMPS2272)
CLOAD = 1 µF
0.05
2
ms
VI = 5.0 V
Output fall time
RLOAD = 10 Ω
(STMPS2242,STMPS2252)
CLOAD = 1 µF
0.05
2
ms
VI = 5.0 V
RLOAD = 10 Ω
CLOAD = 1 µF
0.05
2
ms
Output fall time
(STMPS2262,STMPS2272
Table 6.
Typ
Current limit characteristics
(VI = 5.5 V, IO = rated current, TJ = 25°C, unless otherwise specified)
Value
Symbol
Parameter
Test condition
IOS
(STMPS2242
STMPS2252) Short circuit output
current
I
OS
(STMPS2262
STMPS2272)
10/42
VI = 5 V
OUT connected to
GND through 10 mΩ
load, device enabled
into short circuit
Doc ID 15050 Rev 3
Unit
Min
Typ
Max
0.6
0.8
1.0
A
1.1
1.6
2.0
A
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Table 7.
Electrical specifications
Supply current characteristics
(VI = 5.5 V, IO = rated current, TJ = 25°C, unless otherwise specified)
Value
Symbol
Parameter
Test condition
Unit
Min
No load
Switch is off
Ioff
Switch turned off
Ileakage
Ireverse
Max
9
14
μA
No load
Switch is off
-40 < TJ < 125°C
16
No load
Switch is on
Ion
Typ
Switch turned on
50
μA
No load
Switch is on
-40 < TJ < 125°C
85
Ioff (grounded output) Ioff (floating output)
Output leakage
current (1)
Reversed leakage
current
70
1
2
μA
Ioff (grounded output) Ioff (floating output)
-40 < TJ < 125°C
1
6
Switch is off
VI < VO,
Output connected to
5.5 V, 25°C
1
2
Switch is off
VI < VO
Output connected to
5.5 V, 125°C
1
μA
10
1. Ileakage = Ioff-ground - Ioff, where Ioff-ground = current into IN when switch is off and output is grounded
Table 8.
Thermal characteristics
(VI = 5.5 V, IO = rated current, TJ = 25°C, unless otherwise specified)
Value
Symbol
Parameter
Test condition
Unit
Min
Typ
Max
T1
Thermal shutdown
threshold
135
°C
T2
Recovery from
thermal shutdown
125
°C
Hysteresis
10
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°C
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Electrical specifications
Table 9.
STMPS2242, STMPS2252, STMPS2262, STMPS2272
UVLO characteristics
(VI = 5.5 V, IO = rated current, TJ = 25°C, unless otherwise specified)
Value
Symbol
Parameter
Test condition
Unit
Min
VUVLO
Undervoltage lockout
threshold
2.0
Hysteresis
Table 10.
Typ
Max
2.5
75
V
mV
OCx pin characteristics
(VI = 5.5 V, IO = rated current, TJ = 25°C, unless otherwise specified)
Value
Symbol
Parameter
Test condition
Unit
Min
Typ
Max
4
8
15
ms
OC blanking
OCx assertion and
de-assertion
VO
Output low voltage
IO = 5 mA
−
−
0.4
V
Ioff
Off current
VOC = 2.7 V, 5.5 V
(No OC condition)
−
−
1.0
µA
Table 11.
ENx pin characteristics
(VI = 5.5 V, IO = rated current, TJ = 25°C, unless otherwise specified)
Value
Symbol
Parameter
Test condition
Typ
Max
VI = 2.7 V to 5.5 V
2.0
−
−
V
VIH
High level input
voltage
Low level input
voltage
VI = 4.5 V to 5.5 V
−
−
0.8
V
VIL
VI = 2.7 V to 4.5 V
−
−
0.4
V
Input current
VIENx = 0 V or VI
-0.5
−
0.5
µA
ton
Turn ON time(1)
RLOAD = 10 Ω
CLOAD = 100 μF
−
−
5
ms
toff
Turn OFF time (1)
RLOAD = 10 Ω
CLOAD = 100 μF
−
−
10
ms
II
1. Not tested in production, specified by design.
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Unit
Min
Doc ID 15050 Rev 3
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Typical operating characteristics
6
Typical operating characteristics
6.1
STMPS2242, STMPS2252 characteristics
The waveforms and characteristics shown in this section pertain to the STMPS2252 device.
The STMPS2242 is expected to have the same characteristics with inverted EN input
function. All measurements are at ambient temperature 25 °C.
6.1.1
Turn-on/off characteristics for VI = 3 V, RLOAD = 6 Ω
Figure 3.
Turn-on for CLOAD = 1 µF
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Typical operating characteristics
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STMPS2242, STMPS2252, STMPS2262, STMPS2272
Figure 4.
Turn-on for CLOAD = 100 µF
Figure 5.
Turn-on for CLOAD = 470 µF
Doc ID 15050 Rev 3
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Figure 6.
Turn-off for CLOAD = 1 µF
Figure 7.
Turn-off for CLOAD = 100 µF
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Typical operating characteristics
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Typical operating characteristics
Figure 8.
6.1.2
Turn-off for CLOAD = 470 µF
Turn-on/off characteristics for VI = 5 V, RLOAD = 10 Ω
Figure 9.
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STMPS2242, STMPS2252, STMPS2262, STMPS2272
Turn-on for CLOAD = 1 µF
Doc ID 15050 Rev 3
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Typical operating characteristics
Figure 10. Turn-on for CLOAD = 100 µF
Figure 11. Turn-on for CLOAD = 470 µF
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Typical operating characteristics
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Figure 12. Turn-off for CLOAD = 1 µF
Figure 13. Turn-off for CLOAD = 100 µF
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STMPS2242, STMPS2252, STMPS2262, STMPS2272
Typical operating characteristics
Figure 14. Turn-off for CLOAD = 470 µF
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Typical operating characteristics
6.1.3
STMPS2242, STMPS2252, STMPS2262, STMPS2272
UVLO characteristics
Figure 15. UVLO, VI rising
Figure 16. UVLO, VI falling
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Doc ID 15050 Rev 3
STMPS2242, STMPS2252, STMPS2262, STMPS2272
6.1.4
Typical operating characteristics
Overcurrent protection characteristics
Figure 17. Overcurrent protection characteristics, VI = 3 V, RLOAD = 2.2 Ω
Figure 18. Overcurrent protection characteristics, VI = 5 V, RLOAD = 2.2 Ω
Doc ID 15050 Rev 3
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Typical operating characteristics
6.1.5
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Other electrical characteristics
Figure 19. ICC versus VI
60
50
40
I CC (µA)
EN = H
30
EN = L
20
10
0
2
3
4
5
6
VI (V )
AM045006v1
Figure 20. tr versus VI
5.0
4.5
4.0
3.5
3.0
t r (m s)
C L OAD = 1 µF or
100 µF
2.5
C L OAD = 4 7 0 µF
2.0
1.5
1.0
0.5
0.0
0
1
2
3
V I (V )
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4
5
6
AM045007v1
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Typical operating characteristics
Figure 21. tf versus VI
14
12
t f (m s)
10
C L OAD = 1 µF
8
C L OAD = 1 0 0 µF
6
C L OAD = 4 7 0 µF
4
2
0
0
1
2
3
4
5
6
V I (V )
AM045008v1
Figure 22. Rds(on) versus VI
130
120
Rd s(o n ) (m Ω)
110
100
90
80
70
60
2
2.5
3
3.5
4
V I (V )
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4.5
5
5.5
6
AM045009v1
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Typical operating characteristics
6.2
STMPS2242, STMPS2252, STMPS2262, STMPS2272
STMPS2262, STMPS2272 characteristics
The waveforms and characteristics shown in this section pertain to the STMPS2272 device.
The STMPS2262 is expected to have the same characteristics with inverted EN input
function. All measurements are at ambient temperature 25 °C.
6.2.1
Turn-on/off characteristics for VI = 3 V, RLOAD = 3 Ω
Figure 23. Turn-on for CLOAD = 1 µF
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STMPS2242, STMPS2252, STMPS2262, STMPS2272
Typical operating characteristics
Figure 24. Turn-on for CLOAD = 100 µF
Figure 25. Turn-on for CLOAD = 470 µF
Doc ID 15050 Rev 3
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Typical operating characteristics
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Figure 26. Turn-off for CLOAD = 1 µF
Figure 27. Turn-off for CLOAD = 100 µF
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STMPS2242, STMPS2252, STMPS2262, STMPS2272
Typical operating characteristics
Figure 28. Turn-off for CLOAD = 470 µF
6.2.2
Turn-on/off characteristics for VI = 5 V, RLOAD = 5 Ω
Figure 29. Turn-on for CLOAD = 1 µF
Doc ID 15050 Rev 3
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Typical operating characteristics
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Figure 30. Turn-on for CLOAD = 100 µF
Figure 31. Turn-on for CLOAD = 470 µF
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STMPS2242, STMPS2252, STMPS2262, STMPS2272
Typical operating characteristics
Figure 32. Turn-off for CLOAD = 1 µF
Figure 33. Turn-off for CLOAD = 100 µF
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Typical operating characteristics
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Figure 34. Turn-off for CLOAD = 470 µF
6.2.3
UVLO characteristics
Figure 35. UVLO, VI rising
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STMPS2242, STMPS2252, STMPS2262, STMPS2272
Typical operating characteristics
Figure 36. UVLO, VI falling
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Typical operating characteristics
6.2.4
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Overcurrent protection characteristics
Figure 37. Overcurrent protection characteristics, VI = 3 V, RLOAD = 1 Ω
Figure 38. Overcurrent protection characteristics, VI = 5 V, RLOAD = 1 Ω
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STMPS2242, STMPS2252, STMPS2262, STMPS2272
Other electrical characteristics
Figure 39. ICC versus VI
60
50
I CC (µA)
40
EN = H
30
EN = L
20
10
0
2
3
4
5
6
V I (V )
AM045026v1
Figure 40. tr versus VI
3
2.5
2
C L OAD = 1 µF or
100 µF
t r (m s)
6.2.5
Typical operating characteristics
1.5
C L OAD = 4 7 0 µF
1
0.5
0
0
1
2
3
V I (V )
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4
5
6
AM045024v1
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Typical operating characteristics
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Figure 41. tf versus VI
7
6
5
C L OAD = 1 µF
t f (m s)
4
C L OAD = 1 0 0 µF
3
C L OAD = 4 7 0 µF
2
1
0
0
1
2
3
4
5
6
V I (V )
AM045028v1
Figure 42. Rds(on) versus VI
130
120
Rd s(o n ) (m Ω)
110
100
90
80
70
60
2
2.5
3
3.5
4
4.5
5
5.5
6
V I (V )
AM045029v1
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STMPS2242, STMPS2252, STMPS2262, STMPS2272
7
Application information
7.1
Input and output capacitors
Application information
Input and output capacitors improve the performance of the device; the actual capacitance
should be optimized for the particular application. For all applications, a 0.1 µF or greater
ceramic bypass capacitor between IN and GND as close to the device as possible is
recommended for local noise decoupling. This precaution also reduces ringing on the input
due to power supply transients.
An additional capacitor may be needed on the input to reduce input voltage overshoots from
exceeding the absolute maximum voltage of the device during heavy transient conditions.
This is especially important during bench testing when long, inductive cables are used to
connect the evaluation board to the bench power supply. The value of 100 µF may be
adequate in most situations.
An output capacitor is not required for device functionality, but placing a high-value (in the
order of 10 - 100 µF) electrolytic capacitor on the output pins is recommended when large
transient currents are expected on the output.
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Package mechanical data
8
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Figure 43. SO-8 package outline
0016023 C
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STMPS2242, STMPS2252, STMPS2262, STMPS2272
Table 12.
Package mechanical data
SO-8 mechanical data
Millimeters
Symbol
Min
Typ
Max
A
1.35
−
1.75
A1
0.10
−
0.25
A2
1.10
−
1.65
B
0.33
−
0.51
C
0.19
−
0.25
D (1)
4.80
−
5.00
E
3.80
−
4.00
e
−
1.27
−
H
5.80
−
6.20
h
0.25
−
0.50
L
0.40
−
1.27
k
ddd
0° (min.), 8° (max.)
−
−
0.10
1. Dimension D does not include mold flash, protrusions or gate burrs. Mold flash, potrusions or gate burrs
shall not exceed 0.15 mm (0.006 inch) in total (both sides).
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Package mechanical data
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Figure 44. MSOP8 package outline
MSOP8_7277133_C
Table 13.
MSOP8 mechanical data
Millimeters
Symbol
Min
Typ
Max
A
−
−
1.10
A1
0
−
0.15
A2
0.75
0.85
0.95
b
0.22
−
0.40
c
0.08
−
0.23
D
2.90
3.00
3.10
D3
−
2.16
−
E
4.67
4.90
5.07
E1
2.90
3.00
3.10
E5
−
1.73
−
e
−
0.65
−
1.95
−
e1
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L
0.40
−
0.80
L2
−
0.25
−
<
0°
−
6°
Doc ID 15050 Rev 3
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Package mechanical data
Figure 45. SO-8 carrier tape
0010914_G
Figure 46. MSOP8 carrier tape
?"
Doc ID 15050 Rev 3
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Package mechanical data
STMPS2242, STMPS2252, STMPS2262, STMPS2272
Figure 47. Reel information
Table 14.
Reel mechanical data
Millimeters
Symbol
Min
A
Max
330
C
12.8
D
20.2
N
60
T
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Typ
13.2
22.4
Doc ID 15050 Rev 3
STMPS2242, STMPS2252, STMPS2262, STMPS2272
9
Revision history
Revision history
Table 15.
Document revision history
Date
Revision
Changes
03-Dec-2008
1
Initial release.
18-Dec-2009
2
Modified: Table 6, Table 7 and Table 9.
19-Jan-2011
3
Added Section 6: Typical operating characteristics and Section 7:
Application information; minor textual changes.
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STMPS2242, STMPS2252, STMPS2262, STMPS2272
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