DFE252012F-R47M datasheet(51/122 Pages) AD

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● If the VSYS falls below the VUVLO_F (typ 2.7V), all individual buck outputs are disabled immediately (the UVLO_I

interrupt asserts) and the output-voltage setting registers (Type F) of all buck phases are reset to their default values

(enters buck x output off state).

● If the VIO falls below the VIO_UVLO_F (typ 0.97V), all individual buck outputs are disabled immediately (the VIOFLT_I

interrupt asserts) and the output-voltage setting registers (Type F) of all buck phases are reset to their default values

(enters buck x output off state).

● If one of the enabled buck outputs falls below the VPOK_F (typ 78% of regulation target), the Mx_POKFLT_I asserts.

● If one of the enabled buck outputs stays below the VPOK_R (typ 82% of regulation target) for longer than the

tPOK_TO, only the corresponding output is disabled immediately and the output-voltage setting registers (Type F) of

the corresponding buck are reset to their default values.

● If one of the enabled buck outputs falls below the VSCP (typ 20% of regulation target), only the corresponding output

is disabled immediately (the Mx_SCFLT_I interrupt asserts) and the output-voltage setting registers (Type F) of the

corresponding buck are reset to their default values.

● If the junction temperature exceeds the TSHDN (typ +165°C), all individual buck outputs are disabled immediately

(the TSHDN_I interrupt asserts) and the output-voltage setting registers (Type F) of all buck phases are reset to their

default values.

● POK and SCP monitoring are not active (masked) during soft-start and soft-stop.

When POK fault time-out, SCP, and/or TSHDN fault occurs, the corresponding buck enters either the latch-off or the wait

state from the reset state, depending on the AUTO_RSTRT bit setting.

● If AUTO_RSTRT = 0,

• The output of the individual buck is forced disabled in latch-off state.

• When Mx_EN = EN_Mx = 0 AND TJ ≤ +150°C, the individual buck exits latch-off state and enters buck x output off

state.

● If AUTO_RSTRT = 1,

• After 500ms of forced-disable in wait state, the individual buck automatically exits wait state and enters buck x

output off state, if the junction temperature falls below +150°C (TSHDN = 0).

• If the enable logic of individual buck is still valid when it enters buck x output off state, the corresponding buck

initiates soft-start as it goes into buck x output on state immediately.

MAX77542

16VIN/16A, Quad-Phase High-Efficiency Buck

Converter

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DFE252012F-R47M Datasheet(PDF) 51 Page - Analog Devices