l99pm62gxp STMicroelectronics, l99pm62gxp Datasheet - Page 12

• Manufacturer Part Number: l99pm62gxp
• Description: Power Management Ic With Lin And High Speed Can
• Manufacturer: STMicroelectronics

Detailed description
2
2.1
2.1.1
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Detailed description
Voltage regulators
The L99PM62GXP contains two independent and fully protected low drop voltage
regulators, which are designed for very fast transient response and don’t require electrolytic
output capacitors for stability.
The output voltage is stable with ceramic load capacitors > 220 nF.
Voltage regulator: V
The V
current and is mainly intended for supply of the system microcontroller. The V
embedded in the power management and fail-safe functionality of the device and operates
according to the selected operating mode.
It can be used to supply the internal HS CAN Transceiver via the CANSUP pin externally. In
case of a short circuit condition on the CAN bus, the output current of the transmitter is
limited to 100 mA and the transceiver is turned off in order to ensure continued supply of the
microcontroller.
In addition the regulator V
regulator is protected against overload and overtemperature. An external reverse current
protection has to be provided by the application circuitry to prevent the input capacitor from
being discharged by negative transients or low input voltage. Current limitation of the
regulator ensures fast charge of external bypass capacitors. The output voltage is stable for
ceramic load capacitors > 220 nF.
If the device temperature exceeds the TSD1 threshold, all outputs (OUTx, RELx, V
deactivated except V
logging. In case of exceeding TSD2 threshold (TSD2>TSD1), also V
state chart in
regulator is deactivated for t
LIN, WU1 to3 and wake up of µC by timer) are disabled. After 1 sec, the voltage regulator
tries to restart automatically. If the restart fails 7 times, within one minute, without clearing
and thermal shutdown condition still exists, the L99PM62GXP enters the forced V
standby Mode.
In case of short to GND at “V
enters the forced V
with signals from CAN, LIN, WU1..3 or periodic wake by timer (see
interrupt / wake-up of microcontroller by
1
voltage regulator provides 5 V supply voltage and up to 250 mA continuous load
Chapter 3: Protection and
BAT
1
. Hence the micro controller has the possibility for interaction or error
standby Mode. Reactivation (wake-up) of the device can be achieved
1
1
drives the L99PM62GXP internal 5 V loads. The voltage
TSD
1
” after initial turn on (V
Doc ID 17639 Rev 3
= 1sec. During this time, all other wake up sources (CAN,
diagnosis). A timer is started and the voltage
timer).
1
< 2V for t > t
V1short
Section 2.2.8: Timer
1
is deactivated (see
) the L99PM62GXP
L99PM62GXP
1
regulator is
BAT
2
, LIN) is