STMPS2272MTR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STMPS2272MTR

Enhanced dual-channel power switches

STMicroelectronics 

Functional description

STMPS2242, STMPS2252, STMPS2262, STMPS2272

3

Functional description

3.1

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 have fault-

blanking. Die overtemperature faults and input voltage drops below the UVLO threshold

cause an immediate fault output.

3.2

Overcurrent/overtemperature 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 the temperature

of the die goes above the limit value, the switch turns OFF.

3.3

Note:

Reverse current blocking

When the switch is OFF, or when the STMPS device is not powered (VCC=0 V), the switch

behaves as a 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.

3.4

UVLO

When the input voltage drops below the threshold value, the power switch turns OFF to

prevent improper operation due to low voltage.

8/42

Doc ID 15050 Rev 3

Share Link: