MC34920FN 데이터 시트보기 (PDF) - Freescale Semiconductor
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MC34920FN Datasheet PDF : 29 Pages
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FUNCTIONAL DESCRIPTION
FUNCTIONAL INTERNAL BLOCK DESCRIPTION
On the VV1_FB glitch condition, RESET behaves as follows:
• If the VV1_FB supply falls below VV1T- and remains there
for less than tPERSIST (10 µs to 30 µs), RESET will not be
asserted. However, if the condition lasts longer than
tPERSIST, RESET will be asserted for a duration of
tDELAY. The 10 µs-to-30 µs persistence time specified in
tPERSIST is for ESD rejection. The reset trigger will be a
retriggerable one-shot, where the delay pulse will be
10 µs to 30 µs for the delay timeout.
ENVIRONMENTAL SPECIFICATIONS
AMBIENT TEMPERATURE AND RELATIVE
HUMIDITY
Table 11 lists the temperature and relative humidity for
operating and storage conditions for the 34920.
Table 11. Ambient Temperature and Humidity
Condition
Temperature (°C) % Relative Humidity
Operating
0 to 70
8.0 to 80
Storage
-40 to 150
5.0 to 80
ESD IMMUNITY
Refer to the Maximum Ratings table, page 5.
OVERTEMPERATURE PROTECTION
The 34920 implements overtemperature detection and
shutdown functions. The overtemperature circuitry monitors
the device’s internal temperature and activates thermal
shutdown circuitry when the temperature exceeds
TJ(SHUTDOWN) (155°C minimum, 175°C maximum). The
thermal shutdown condition is maintained until the die
temperature falls below TJ(ENABLE) (135°C minimum, 155°C
maximum). Each voltage regulator and motor driver circuit
has its own individual shutdown circuit.
Analog Integrated Circuit Device Data
Freescale Semiconductor
34920
23
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