stmps2242 STMicroelectronics, stmps2242 Datasheet - Page 7

• Manufacturer Part Number: stmps2242
• Description: Enhanced Dual Channel Power Switches
• Manufacturer: STMicroelectronics

STMPS2242, STMPS2252, STMPS2262, STMPS2272
3
3.1
3.2
3.3
Note:
3.4
Functional description
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 are blanked.
Die over-temperature faults and input voltage drops below the UVLO threshold cause an
immediate fault output.
Overcurrent/over-temperature 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 temperature of
die goes above limit value, the switch turns OFF.
Reversed current blocking
When the switch is OFF, or when the STMPS device is un-powered (V
behaves as an Hi-Z at the output pin, ensuring that no reverse current will flow into the
device when Vi<Vo.
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.
UVLO
When input voltage drops below critical value, the power switch turns OFF to prevent
improper operation due to low voltage.
Doc ID 15050 Rev 2
Functional description
CC
=0 V), the switch
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