DS6257A Datasheet, PDF (4/15 Pages) Richtek Technology Corporation – 6A, 18V, 500kHz, ACOTTM Step-Down Converter

RT6257A/B
driver supply voltage for the high-side N-channel MOSFET
switch.
Over-Temperature Protection
The RT6257A/B includes an Over-Temperature Protection
(OTP) circuitry to prevent overheating due to excessive
power dissipation. The OTP will shut down switching
operation when the junction temperature exceeds 150°C.
Once the junction temperature cools down by
approximately 15°C, the IC will resume normal operation.
For continuous operation, provide adequate cooling so
that the junction temperature does not exceed 150°C.
UVP Protection
The RT6257A/B detects under-voltage conditions by
monitoring the feedback voltage on FB pin. When the
feedback voltage is lower than 60% of the target voltage,
the UVP comparator will go high to turn off both internal
high-side and low-side MOSFETs.
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DS6257A/B-00 September 2016