ADP1055ACPZ-R7 datasheet(67/140 Pages) AD

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Data Sheet

ADP1055

Rev. A | Page 67 of 140

VOUT_UV_WARN_LIMIT

The VOUT_UV_WARN_LIMIT command sets the lower voltage threshold (in volts) measured at the sense/output pin that causes an

undervoltage warning condition. The exponent N is set using VOUT_MODE[4:0]. The device notifies the host and sets the NONE_OF_

THE_ABOVE bit in the STATUS_BYTE register, the VOUT bit in the STATUS_WORD register, and the VOUT_UV_WARNING bit in

the STATUS_VOUT register.

Table 41. Register 0x43—VOUT_UV_WARN_LIMIT

Bits

Bit Name

R/W

Description

[15:0]

Mantissa-Y

R/W

Unsigned Y-mantissa used in output voltage related commands in linear data format (V = Y × 2N).

VOUT_UV_FAULT_LIMIT

The VOUT_UV_FAULT_LIMIT command sets the threshold value (in volts) measured at the sense/output pin that causes an under-

voltage fault condition. The exponent N is set using VOUT_MODE[4:0].

Table 42. Register 0x44—VOUT_UV_FAULT_LIMIT

Bits

Bit Name

R/W

Description

[15:0]

Mantissa-Y

R/W

Unsigned Y-mantissa used in output voltage related commands in linear data format (V = Y × 2N).

VOUT_UV_FAULT_RESPONSE

The VOUT_UV_FAULT_RESPONSE command instructs the device on actions to take due to an output undervoltage fault condition.

The device notifies the host and sets the NONE_OF_THE_ABOVE bit in the STATUS_BYTE register, the VOUT bit in the STATUS_WORD

Table 43. Register 0x45—VOUT_UV_FAULT_RESPONSE

Bits

Bit Name

R/W

Description

[7:6]

Response

R/W

Determines the device response to an undervoltage fault condition.

Bit 7

Bit 6

Response

Do nothing.

Continue operation for the delay time (Bits[2:0]). If the fault persists, retry the

number of times specified by Bits[5:3].

Shut down, disable the output, and respond as programmed in the retry

setting (Bits[5:3]).

Disable the output while the fault is present. Operation resumes and the

output is enabled when the fault condition no longer exists.

[5:3]

Retry setting

R/W

Number of retry attempts following a fault condition. A fault condition can be cleared by a reset,

a power-off/power-on sequence, or a loss of bias power.

Bit 5

Bit 4

Bit 3

Number of Retries

Infinite

[2:0]

Delay times

R/W

Number of delay time units (see Register 0xFE3E).

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