ACT41000-101 datasheet(48/72 Pages) QORVO

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ACT41000

Programmable Voltage, Programmable Current, Low Noise

RFPoL Step-Down Voltage Regulator

Executing Protections

The ACT41000 integrates multiple levels of device protections. Each level of protection behavior is explained in following

sections in the order of severity.

Protection Level 1

The level 1 protection is a complete shutdown of the device except very minimum functions.

When following protections are triggered, the device stops its entire function except UVLO and OVLO blocks because the

input voltage VIN (and PVIN) is out of acceptable operation range.

See Recommended Operating Conditions.

• Under-Voltage Lock-Out

• Over-Voltage Lock-Out

This level 1 protection status continues until both UVLO and OVLO are released.

The OVLO does not protect the device from any potential damage caused by over-voltage events.

See Note of Absolute Maximum Rating.

Protection Level 2

The level 2 protection is a whole device reset of the device by executing an auto-restart procedure.

When following protections are triggered, the device executes the Reset Sequence because the device cannot continue its

normal operations safely.

• Mini-buck Over-Current Protection

• Mini-buck Over-Voltage Protection

• Mini-buck Under-Voltage Protection

• AUX LDO Under-Voltage Protection

• Hard TSD

Reset Sequence

1. Stop the Mini-buck Regulator and Auxiliary LDO.

2. Start a logic timer of the tD(RESET) reset blanking period.

3. Restart the Mini-buck Regulator at the time out of "2." timer.

Protection Level 3

The level 3 protection is a latch-OFF of the Main-buck Regulator function.

When following protections are triggered, the device turns OFF the Main-buck Regulator and remains OFF until the iEN

signal becomes logic-L. This latch-OFF status is just like a device waiting for an enable trigger even though iEN maintains

logic-H from the timing of event caused this latch-OFF state.

• Latch-off Operation

• SYNC Input Error Latch-off Operation

• Over-Voltage Protection

• Over-Current Protection

Protection Level 4

The level 4 protection is a temporary disable of the Main-buck Regulator function, with an auto-restart. Or it is so called a

"hiccup" operation.

When following protections are triggered, the device turns OFF the Main-buck Regulator for the tW(HICCUP) period and retry

to activate the main-buck. When a cause of protection remains, another disable cycle is repeated for another tW(HICCUP)

period.

• Hiccup Operation

• SYNC Input Error Hiccup Operation

• Soft TSD

ACT41000 Data Sheet, Rev. B, 01-Apr-2022

Subject to change without notice

ACT41000-101 Datasheet(PDF) 48 Page - Qorvo, Inc

ACT41000-101 Datasheet(HTML) 48 Page - Qorvo, Inc

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