L99PM72PXP datasheet(16/128 Pages) STMICROELECTRONICS

tên linh kiện	L99PM72PXP

Giải thích chi tiết về linh kiện	Advanced power management system IC with embedded LIN and high speed CAN transceiver supporting CAN Partial Networking

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Detailed description

L99PM72PXP

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Doc ID 023553 Rev 3

Alternatively, Voltage Regulator 1 can be used to provide the 5 V reference for this topology.

However, the additional current consumption through R3 and R4 has to be considered in

V1_standby Mode.

2.1.4

Voltage regulator failure

The V1 and V2 regulator output voltages are monitored.

In case of a drop below the V1, V2 - fail thresholds (V1,2 < 2 V, typ for t > 2 µs), the V1,2 -fail

bits are latched. The fail bits can be cleared by a dedicated SPI command.

Short to ground detection

If 4 ms after turn on of the regulator the V1,2 voltage is below the V1,2 fail thresholds,

(independent for V1,2), the L99PM72PXP identifies a short circuit condition at the related

regulator output and the regulator are switched off.

In case of V1 short to GND failure the device enters VBat_standby mode automatically. Bits

Forced VBAT TSD2/SHTV1 and V1_fail were set.

In case of a V2 short to GND failure the V2 short and V2 fail bit is set.

If the output voltage of the corresponding regulator once exceeded the V1,2_fail thresholds

the short to ground detection is disabled. If a short to ground condition occurs the regulator

outputs switch of due to Thermal shutdown (V1 at TSD2; V2 at TSD1).

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