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ST2052 Datasheet

  • ST2052

  • CURRENT LIMITED POWER DISTRIBUTION SWITCHES

  • 9頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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ST2052
CURRENT LIMITED
POWER DISTRIBUTION SWITCHES
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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
10 ms OC_N FAULT BLANKING
2.5ms TYPICAL RISE TIME
UNDERVOLTAGE LOCKOUT
10碌A(chǔ) MAXIMUM STANDBY SUPPLY
CURRENT
AMBIENT TEMPERATURE RANGE, 0擄C TO
85擄C
ESD PROTECTION
SOP
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 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
switching. The charge pump requires no external
Table 1: Order Codes
Type
ST2052BD
ST2052BDR
Temperature
Range
-40 to 85 擄C
-40 to 85 擄C
Package
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 10ms deglitching circuit
provides fault-blanking feature, preventing the
OC_N pin to be asserted during hot-insertion or
short spikes of overcurrent conditions.
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)
July 2005
Rev. 2
1/9

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