13
AT73C202
2740B–PMGMT–05/03
Backup Battery LDO
(V-BCK)
T
AMB
= -20°C to 85°C, V
BAT
= 3V to 4.2V unless otherwise specified.
Note: 1. V
OUT
and I
OUT
refer to V-BCK.
RTC LDO
(V-RTC)
T
AMB
= -20°C to 85°C, V
BAT
= 3V to 4.2V unless otherwise specified.
Note: 1. V
OUT
and I
OUT
refer to V-RTC
Table 12. Backup Battery LDO (V-BCK)
(1)
Electrical Characteristics
Symbol Parameter Conditions Min Typ Max Unit
V
OUT
(1)
Output Voltage BB1 = 0 2.4 2.45 2.50 V
V
OUT
(1)
Output Voltage BB1 = 1 2.65 2.7 2.75 V
I
OUT
(1)
Output Current 25mA
V
DROP
Dropout Voltage 50 mV
I
QC
Quiescent Current 4.8 6.6 9.7 µA
PSRR Ripple Rejection 40 dB
T
R
Rise Time 110 320 µs
Table 13. Backup Battery LDO (V-BCK) External Components
Symbol Parameter Conditions Min Typ Max Unit
C
OUT
Output Capacitor Value 1.98 2.2 2.42 µF
C
ESR
Output Capacitor ESR 100 KHz 100 mΩ
Table 14. RTC LDO (V-RTC)
(1)
Electrical Characteristics
Symbol Parameter Conditions Min Typ Max Unit
V
OUT
(1)
Output Voltage BB1 = 0 1.45 1.50 1.55 V
BB1 = 1 (not used)
I
OUT
(1)
Output Current 0.5 mA
V
DROP
Dropout Voltage 50 mV
I
QC
Quiescent Current 4.8 6.6 9.7 µA
I
SD
Shutdown Current 0.1 1 µA
PSRR Ripple Rejection 40 dB
T
R
Rise time 110 320 µs
Table 15. RTC LDO (V-RTC) External Components
Symbol Parameter Conditions Min Typ Max Unit
C
OUT
Output Capacitor Value 198 220 242 nF
C
ESR
Output Capacitor ESR 100 KHz 100 mΩ