ST2052
Current limited
power distribution switches
Not recommended for new design
Features
■
80 mΩ high-side MOSFET switch
■
500 mA continuous current per channel
■
independent thermal and short-circuit
protection with overcurrent logic output
■
Operating range from 2.7 V to 5.5 V
■
CMOS- and TTL-compatible enable inputs
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10 ms OC_N fault-blanking
■
2.5 ms typical rise time
■
Undervoltage lock out
■
10 μA maximum standby supply current
■
Ambient temperature range, -40 °C to 85 °C
■
ESD protection
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Order code
ST2052BDR(1)
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Device summary
ST2052BD(1)
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SO-8
■
Table 1.
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Package
Packaging
SO-8
Tube
(50 parts per tube, 40 tube per box)
SO-8
Tape and reel (2500 parts per reel)
1. Not recommended for new design (refer to STMPS2252MTR). Contact ST sales office for availability.
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November 2010
Doc ID 9994 Rev 4
This is information on a product still in production but not recommended for new designs.
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Contents
ST2052
Contents
1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
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4.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.2
Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
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Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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Doc ID 9994 Rev 4
ST2052
1
Description
Description
The ST2052 power distribution switches is intended for application where heavy capacitive
loads and short -circuits are likely to be encountered. These devices incorporate 80 mΩ
N-channel MOSFET high-side power switches for power-distribution systems that require
multiple powers switches in a single package. Each switch is controlled by an independent
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
2.7 V.
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. A 10 ms deglitching circuit provides faultblanking feature, preventing the OC_N pin to be asserted during hot-insertion or short
spikes of overcurrent conditions.
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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. These power-distribution switches are
designed to current limit at 0.9 A.
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Block diagram
2
ST2052
Block diagram
Figure 1.
Block diagram
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Power switch
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ST2052
3
Pin connections
Pin connections
Figure 2.
Pin connections (top view)
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Table 2.
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Pin functions
Pin
Symbol
1
GND
2
IN
3
EN1
4
EN2
5
OC2
Input voltage
OUT2
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Ground
OUT1
OC1
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Enable input. Logic high turns on power switch IN-OUT1.
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Description
Enable input. Logic high turns on power switch IN-OUT2.
Overcurrent. Logic output active low IN-OUT2.
Power switch output
Power switch output
Overcurrent. Logic output active Low IN-OUT2.
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Electrical ratings
ST2052
4
Electrical ratings
4.1
Absolute maximum ratings
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.
Symbol
Parameter
VO
Output voltage range
VIENX
ete
Continuous output current
ESD
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Junction operating temperature
1. All voltages are referred to GND.
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(s
V
-0.3 - (VI + 0.3)
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-0.3 to 6
V
2
kV
-40 to 125
°C
Internally limited
ol
Electrostatic discharge
TJ
Unit
du
-0.3 to 6
(1)
EN Input voltage range
IO
Recommended operating conditions
Table 4.
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Parameter
Input voltage range(1)
Min
Typ
Max
Unit
2.7
5.5
V
VO
Output voltage
range(1)
0
5.5
V
IO
Continuous output current (per switch)
0
500
mA
VI
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Recommended operating conditions
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Symbol
1. All voltages are referred to GND.
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Value
Input voltage range(1)
VI
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Absolute maximum ratings
Doc ID 9994 Rev 4
ST2052
5
Electrical characteristics
Electrical characteristics
VI = 5.5 V, IO = rated current, VIEN = VI, TJ = 25 °C, unless otherwise specified. (See Note 1
on page 8).
Table 5.
Symbol
RDS(on)
Power switch electrical characteristics
Parameter
Static drain-source
ON-state resistance
Test conditions
Min
Output rise time
IO = 0.5 A
80
100
VI = 5 V
IO = 0.5 A, TJ = 85 °C
90
120
VI = 5 V
IO = 0.5 A, TJ =125 °C
100
135
VI = 3.3 V IO = 0.5 A
90
125
VI = 3.3 V IO = 0.5 A, TJ = 85 °C
110
145
Output fall time
Symbol
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RL = 10, C L = 1µF
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mΩ
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120
Pr
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2.5
ms
3
0.3
ms
0.2
Enable Input ENx characteristics
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Parameter
Test conditions
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Min
Typ
Max
High level input
voltage
Low level input
voltage
VI = 4.5 to 5.5 V
0.8
VIL
VI = 2.7 to 4.5 V
0.4
Input current
VIENX = 0 V or VI
Turn-on time
Turn-off time
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Table 7.
Symbol
IOS
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toff
Unit
(s)
VIH
II
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VI = 5.5 V
VI = 2.7 V
Table 6.
bs
VI = 5.5 V
VI = 2.7 V
tf
Max
VI = 5 V
VI = 3.3 V IO = 0.5 A, TJ = 125 °C
tr
Typ
VI = 2.7 to 5.5 V
2
Unit
V
V
0.5
μA
RL= 10 Ω, CL= 100 μF
20
ms
RL= 10 Ω, CL= 100 μF
40
ms
-0.5
Current limit characteristics
Parameter
Short-circuit output
current
Test conditions
Min
Typ
Max
Unit
VI = 5 V, OUT connected to GND,
device enabled into short-circuit
0.7
1
1.3
A
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Electrical characteristics
Table 8.
Supply current characteristics
Symbol
Parameter
ISOL
Current low level
output
ISOH
Current low high
output
IL
Output leakage
current
Table 9.
VIL
VHYS
Table 10.
Typ
Max
0.025
1
VIENX = VI, no load,
TJ = -40 to 125 °C
10
VIENX = 0, no load,
70
VIENX = 0, no load,
TJ = -40 to 125 °C
100
VIENX = VI, output connected to
GND, TJ = -40 to 125 °C
10
Test conditions
Low level input
voltage
Min
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Overcurrent (OC) characteristics
Parameter
Test conditions
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Sink current
VO = 5 V
VO
Output low voltage
IO = 5 mA
IOFF
OFF-state current
TFB
Fault-blanking period
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(s
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Min
2
2.5
V
mV
Max
0.5
V
1
μA
10
2
Specified by design, not production tested.
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Guaranteed by design.
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Unit
mA
Pulse testing techniques maintain junction temperature close to ambient temperature:
thermal effect must be takes into account separately.
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μA
Unit
10
VO = 5 V VO = 3.3 V
VI = 5.5 V, TJ = 25 °C
(See Note 2 and Note 3)
μA
Max
100
Typ
μA
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Hysteresis
Typ
Unit
90
1
3
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Min
VIENX = VI, no load,
Parameter
Symbol
ISINK
Test conditions
Undervoltage characteristics
Symbol
Note:
ST2052
ms
ST2052
Electrical characteristics
Figure 3.
Figure 4.
Test circuit
Waveform - propagation delays (f = 1 MHz; 50% duty cycle)
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Package mechanical data
6
ST2052
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.
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ST2052
Package mechanical data
Figure 5.
SO-8 package outline
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Table 11.
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SO8 - mechanical data
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Millimeters
Symbol
ct
Min
Min
1.75
0.053
0.069
0.10
0.25
0.004
0.010
1.10
1.65
0.043
0.065
0.33
0.51
0.013
0.020
C
0.19
0.25
0.007
0.010
D
4.80
5.00
0.189
0.197
E
3.80
4.00
0.15
0.157
A1
A2
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B
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inches
Max
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A
1.35
Pr
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Typ
&
1.27
Typ
Max
0.050
H
5.80
6.20
0.228
0.244
h
0.25
0.50
0.010
0.020
L
0.40
1.27
0.016
0.050
k
ddd
8° (max.)
0.10
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0.004
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Package mechanical data
Figure 6.
ST2052
Tape and reel SO-8 package outline
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Table 12.
Symbol
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A
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Tape and reel SO-8 mechanical data
Pr
od
Min
Millimeters
Typ
inches
Max
Min
330
Max
12.992
C
12.8
D
20.2
0.795
N
60
2.362
T
13.2
Typ
0.504
22.4
0.519
0.882
A0
8.1
8.5
0.319
0.335
B0
5.5
5.9
0.216
0.232
K0
2.1
2.3
0.082
0.090
P0
3.9
4.1
0.153
0.161
P
7.9
8.1
0.311
0.319
Doc ID 9994 Rev 4
ST2052
7
Revision history
Revision history
Table 13.
Revision history
Date
Revision
Changes
13-Jul-2005
2
Add bullet on pag. 1, add paragraph in the description on pag. 1
and add row TFB on Table 10.
30-May-2007
3
Updated features in cover page, document reformatted
4
Document reformatted, added “Not Recommended for New
Design” and Note 1 below Table 1, corrected typo in Features,
Section 1, Table 2 to Table 10, title of Figure 4, updated Table 1,
Section 4.1, Section 5, ECOPACK® text in Section 6 and
Table 11.
24-Nov-2010
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ST2052
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Please Read Carefully:
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Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the
right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any
time, without notice.
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All ST products are sold pursuant to ST’s terms and conditions of sale.
Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no
liability whatsoever relating to the choice, selection or use of the ST products and services described herein.
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No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this
document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products
or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such
third party products or services or any intellectual property contained therein.
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UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED
WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS
OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.
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UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT
RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING
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GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK.
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Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void
any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any
liability of ST.
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ST and the ST logo are trademarks or registered trademarks of ST in various countries.
Information in this document supersedes and replaces all information previously supplied.
The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners.
© 2010 STMicroelectronics - All rights reserved
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