L99PM72PXP datasheet(16/128 Pages) STMICROELECTRONICS

Part #	L99PM72PXP

Description	Advanced power management system IC with embedded LIN and high speed CAN transceiver supporting CAN Partial Networking

PDF	128 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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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).

L99PM72PXP Datasheet(PDF) 16 Page - STMicroelectronics