ATA6602-PLQW ATMEL [ATMEL Corporation], ATA6602-PLQW Datasheet - Page 14
ATA6602-PLQW
Manufacturer Part Number
ATA6602-PLQW
Description
Microcontroller with LIN Transceiver, 5V Regulator and Watchdog
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATA6602-PLQW.pdf
(362 pages)
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3.3.16
14
ATA6602/ATA6603
Voltage Regulator
The voltage regulator needs an external capacitor for compensation and to smooth the distur-
bances from the microcontroller. It is recommend to use an tantalum capacitor with C > 1.8 µF
and a caramic capacitor with C = 100 nF. The values of these capacitors can be varied by the
customer, depending on the application.
During mode change from Silent to Normal Mode, the voltage regulator ramps up to 6V for only
a few microseconds before it drops back to 5V. This behavior depends on the value of the load
capacitor. With 4.7 µF, the overshoot voltage has its greatest value. This voltage decreases with
higher or lower load capacitors.
The main power dissipation of the IC is created from the V
needed for the application.
In
Figure 3-7.
• The WD_OSC pin is a constant voltage regulator which supplies 2.5V for the external resistor
Figure 3-8 on page 15
ROSC to adjust the watchdog timing. This output is short circuit protected. A short circuit to
GND causes a reset a pin NRES after typically 4 ms. An open circuit causes a reset at pin
NRES after typically 7 ms.
NRES
VDD
VS
V
5.5V
12V
thun
3V
5V
5V
VDD Voltage Regulator: Ramp Up and Undervoltage
you see the safe operating range of the LIN-SBC.
t
vcc
t
res
DD
output current I
t
res_f
4921C–AUTO–01/07
VDD
, which is
t
t
t
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