MFS5600AMMA7ES datasheet(39/111 Pages) NXP

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NXP Semiconductors

FS5600

Automotive buck regulator and controller with voltage monitors and watchdog timer

Parameter

Symbol

Min

Typ

Max

Unit

OTP_VMONx_OVTH[3:0]: Set point

Accuracy OTP_VMONx_OVTH[3:0] = 1011

VMONx_OVTH

107

108.5

110

OTP_VMONx_OVTH[3:0]: Set point

Accuracy OTP_VMONx_OVTH[3:0] = 1100

VMONx_OVTH 107.5

109

110.5

OTP_VMONx_OVTH[3:0]: Set point

Accuracy OTP_VMONx_OVTH[3:0] = 1101

VMONx_OVTH

108

109.5

111

OTP_VMONx_OVTH[3:0]: Set point

Accuracy OTP_VMONx_OVTH[3:0] = 1110

VMONx_OVTH 108.5

110

111.5

OTP_VMONx_OVTH[3:0]: Set point

Accuracy OTP_VMONx_OVTH[3:0] = 1111

VMONx_OVTH

109

110.5

112

UV Debounce OTP_VMONx_UV_DB[1:0] =

VMONx_UVDB

UV Debounce OTP_VMONx_UV_DB[1:0] =

VMONx_UVDB

UV Debounce OTP_VMONx_UV_DB[1:0] =

VMONx_UVDB

UV Debounce OTP_VMONx_UV_DB[1:0] =

VMONx_UVDB

OV Debounce OTP_VMONx_OV_DB[1:0] =

VMONx_OVDB

OV Debounce OTP_VMONx_OV_DB[1:0] =

VMONx_OVDB

OV Debounce OTP_VMONx_OV_DB[1:0] =

VMONx_OVDB

OV Debounce OTP_VMONx_OV_DB[1:0] =

VMONx_OVDB

100

125

150

Table 37. VMON1-4 electrical specifications...continued

17.3 Watchdog

The FS5600 offers a windowed watchdog with Simple and Challenger schemes. The

Challenger scheme is available only in the Enhanced ASIL B version. The Watchdog

timer is enabled by setting OTP_WD_DIS = 0. The Watchdog timer is disabled if

OTP_WD_DIS = 1.

When OTP_WD_SELECTION = 0, the Simple scheme is selected. When

OTP_WD_SELECTION = 1, the Challenger scheme is selected.

In the windowed watchdog, the watchdog duration is split into OPEN and CLOSED

windows. The first half of the duration (window) is CLOSED and the second half of the

duration (window) is OPEN. A good watchdog refresh must occur during the OPEN

window.

The following constitute a bad (erroneous) watchdog refresh:

• Wrong watchdog answer during the OPEN window

• No watchdog refresh during the OPEN window

• Good or bad watchdog answer during the CLOSED window.

FS5600

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 3 — 2 August 2022

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