Preliminary Data
August 2006
Rev 1
1/18
18
This is preliminary information on a new product now in development or undergoing evaluation.
Details are subject to change without notice.
STMEC001
Power switch for ExpressCard
Features
Comply with PC Card
TM
standard for
ExpressCard
3-channel power switch
Over-current & thermal protection & soft start
Built-in under-voltage lockout (UVLO) circuit
Ultra-low standby-mode current
5V or 12V power supply not required
High reliability ensured with integrated over-
current, thermal and undervoltage protection
circuitries applied to each voltage rail
Soft start function for non-rush current
Ultra-low standby-mode current for power
saving
Ultra-low ON resistance for fast switching
Description
The STMEC001 is an ExpressCard power
interface switch providing total power
management solution required by ExpressCard
Specification. STMEC001 consists of 3 internal
switches distributing 3.3V, 3.3V
AUX
, and 1.5V to
ExpressCard Socket without additional charge
pump or external switches required. STMEC001
ExpressCard power switch can be applied to
notebook computers, desktop computers,
personal digital assistant (PDA), and other
handheld devices implementing ExpressCard.
TSSOP24
TSSOP20
www.st.com
Order codes
Part number
Package
STMEC001BTTR
TSSOP24 ( with Exposed Pad )
STMEC001ATTR
TSSOP20
Typical application
Contents
STMEC001
2/18
Contents
1
Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1
Pin functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2
Power states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3
Power states description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5
Logic characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6
Switching times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Maximum ratings
STMEC001
4/18
2 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.
Note:
Absolute maximum ratings are those values above which damage to the device may occur.
Functional operation under these conditions is not implied. All voltages are referenced to GND.
Table 1.
Absolute maximum ratings
Symbol Parameter
Value
Unit
V
I
Input voltage
V
I
(3.3V
IN
) 0.3 to 4.6
V
V
I
(1.5V
IN
) 0.3 to 4.6
V
V
I
(3.3V
AUX
) 0.3 to 4.6
V
I
O
Output current
V
I
(3.3V
IN
)
I
nternally limited
V
I
(1.5V
IN
) Internally limited
V
I
(3.3V
AUX
) Internally limited
T
OP
Operating junction temperature, T
J
(max to be
calc. at worst case PD at 85 C ambient)
40 to 120
C
T
STG
Storage temperature range
55 to 150
C
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