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ST2042 Datasheet

  • ST2042

  • CURRENT LIMITED POWER DISTRIBUTION SWITCHES

  • STMicroelectronics   STMicroelectronics

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ST2042
CURRENT LIMITED
POWER DISTRIBUTION SWITCHES
s
s
s
s
s
s
s
s
s
s
80m鈩?HIGH-SIDE MOSFET SWITCH
500mA CONTINUOUS CURRENT PER
CHANNEL
INDEPENDENT THERMAL AND
SHORT-CIRCUIT PROTECTION WITH
OVERCURRENT LOGIC OUTPUT
OPERATING RANGE FROM 2.7V TO 5.5V
CMOS- AND TTL-COMPATIBLE ENABLE
INPUTS
2.5ms TYPICAL RISE TIME
UNDERVOLTAGE LOCKOUT
10碌A MAXIMUM STANDBY SUPPLY
CURRENT
AMBIENT TEMPERATURE RANGE, 0擄C TO
85擄C
ESD PROTECTION
SOP
DESCRIPTION
The ST2042 power distribution switches is
intended for application where heavy capacitive
loads and short circuits are likely to be
encountered. These devices incorporate 80m鈩?/div>
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
ORDERING CODES
Type
ST2042BD
ST2042BDR
Temperature
Range
-40 to 85 擄C
-40 to 85 擄C
Package
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. 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
Comments
50parts per tube / 40tube per box
2500 parts per reel
SO-8 (Tube)
SO-8 (Tape & Reel)
October 2003
1/8

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