Specifications

WM_PRJ_Q2400_PTS_002 - 002
24th January 2003
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2.19.2 Typical implementation
2.19.2.1 Capacitor
VCC-RTC
Regulator
2.5 V
±
10%
(With very Low Iq)
+VBATT
470
1K
Ex : 470uF
Shottky
Diode
En
Vout
Gn
d
Vin
Estimated range with 470 µF Capacitor : ~30 seconds.
2.19.2.2 Super Capacitor
Regulator
2.5 V
±
10%
(With very Low Iq)
+VBATT
470 1K
Ex : EECE0EL474S
(Panasonic)
Shottky
Diode
En
Vou
t
Gn
d
Vin
VCC_RTC
Estimated range with 0.47 Farad Gold Cap : 2 hours min.
Note : the Gold Capacitor maximum voltage is 2.5 V.