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TS33001-M033QFNR Arkusz danych(PDF) 8 Page - Semtech Corporation |
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TS33001-M033QFNR Arkusz danych(HTML) 8 Page - Semtech Corporation |
8 / 16 page TS33001/2/3 Final Datasheet Rev 1.6 January 15, 2016 www.semtech.com 8 of 16 Semtech Proprietary & Confidential Internal Protection Details Internal Current Limit Current limit is always active when the regulator is enabled. High side current limit will shorten the high side on time and tri-state the high side. Additionally, low side current limit will protect the low side FET and turn off the switch if current limit is sensed on the low side switch. Since the output is fully synchronous, the current limit is protected on the low side in both the positive and negative direction. Soft Start Soft start ensures current limit does not prevent regulator startup and minimize overshoot at startup. The typical startup time is 3ms. These values do not change with output voltage, current limit settings, or adjustable/fixed mode. The soft start is re-triggered with the any rising edge that enables the regulator, including the EN input pins, thermal shutdown, VCC Undervoltage, or a VCC Power cycle. Thermal Shutdown If the temperature of the die exceeds 170C, the VSW outputs will tri-state to protect the device from damage. The PG and all other protection circuitry will stay active to inform the system of the failure mode. Once the device cools to 160C, the device will attempt to start up again, following the normal soft start sequence with 10ms delay on PG. If the device reaches 170C, the shutdown/restart sequence will repeat. Output Overvoltage If the output of the regulator exceeds 106% of the regulation voltage, the VSW outputs will tri-state to protect the device from damage. This check occurs at the start of each switching cycle. If it occurs during the middle of a cycle, the switching for that cycle will complete, and the VSW outputs will tri-state at the beginning of the next cycle. VCC Under-Voltage Lockout The device is held in the off state until VCC reaches 2.2V. There is a 200mV hysteresis on this input, which requires the input to fall below 2V before the device will disable. |
Podobny numer części - TS33001-M033QFNR |
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Podobny opis - TS33001-M033QFNR |
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